X-29 Foam Park Flyer

[scottwhite68]

Hi guys ive just d/l the plans and ive been cutting the pieces out..
This should be a great plane..

[Barkin9]

Just found out that Krolyn has a latex besed spray paint called H2O gave it a try, and it worked well. I found it worked well for a base coat. did not eat FFF. I cant afford an airbrush just yet.
Barkin

Will 1/2 throttle eliminate the torque roll on take off?
Is it as bad as people are stating? getting close to maiden
I guess I can just launch it in the verticle. LOL

Oh by the way, how are you setting up the controll surfaces? Just do it like Jetset's Grippen?
thanks

[Mad Hungarian]

I know this question has been asked and answered couple of times but can anybody tell me what material to use and were to get it to build a X-29 please? I have looked for depron localy but no one seem to know what it is and/or carry it. Any help would be appreciated.

[derailed]

i can't get depron here eigther
i made an F-18 from the foam at walmart
i found it in the stationary department with the cardboard
3mm thick foam with a paper layer on each side
just remove the paper sheets, and ya got 3mm white foam
i used it for this F-18,a few profile planes,and other projects

[Photon]

You can try here:
http://www.depronusa.com/
http://www.rcfoam.com/

[RCParkflyer]

I have the FREE 3D Foamy X-29 plans and Parts Template files (2 Each tiled and Non-tiled) in the original zip file. I opened the zip-file and tried to up-load the 4 PDF files directly to the thread but 3 out of the 4 are over the 100K file limit.

So, I will be hosting the ZIP File on my RCHomepage site for the time being, so anyone who wants to download it can do that for a while, till I chew up too much bandwidth again :(

FREE 3D foamy X-29 Plans and Templates ZIP File. (http://www.parkfly.rchomepage.com/plans/3DF_X-29.zip)

I'll also be posting the links on my RCHomepage Free Jet Plans Page (http://www.parkfly.rchomepage.com/plans.html)

Tom - Milwaukee

[Action Jack]

Derailed, I got some depron through Great Hobbies here in Edmonton. They had some sheets of 5mm and 6mm in their store so maybe give them a call. They have a shop out east.

Jack

[roccobro]

Thanks Tom!

Justin

[Barkin9]

I logged my 1st and 2nd flight Sunday! This plane is like nothing I have ever flown. I can go so slow it is great. Once I got it trimmed out it was a pussycat.
I will have video of the 3rd flight tonight after work.
Plane ended up 15.90oz, but all in all if flew fantastic. Torque roll was not a factor at all at ½ throttle.

How is everyone setting up your canard?
I have it mixed as flap and elevator
Barkin

[Arbo]

Congrats. Look forward to the video.

[RCParkflyer]

Hi Barkin

If anyone can wring out this jet, it's you!!!! (I've seen your F-18 Video's) :D

BTW if you ever go to the USAF Muesum (I'd have my own reserved spot there if I lived in Dayton) :) the X-29 is in the R&D Hanger on the main base. I wonder if they'd ever let us R/C guys take our foamy's in the muesuem, and pose next to the planes we have modeled :eek:

Best of luck, and I too look forward to the video!!

Tom - Milwaukee

[empeabee]

I logged my 1st and 2nd flight Sunday! This plane is like nothing I have ever flown. I can go so slow it is great. Once I got it trimmed out it was a pussycat.
I will have video of the 3rd flight tonight after work.
Plane ended up 15.90oz, but all in all if flew fantastic. Torque roll was not a factor at all at ½ throttle.

How is everyone setting up your canard?
I have it mixed as flap and elevator
Barkin

Congratulations.
Mike

[Barkin9]

Sweet I live in Dayton as well. I go to the Museum all the time. Great place to hang out on a rainy day. They have one in the annex? Ill go check it out.
We need to get together and fly. My friend and flying partner in crime's mother has a place in Xenia with a big field in her front yard.

Thanks for the comments on the F-18 that was a great plane, it is retired now

Where do you do your flying??
Barkin

(Edit) thought you lived in Dayton Dang. Yes I go several times a quater
Yes we coud do that, I have friend(of a friend) that works there full time restoring planes. Man what a horrible job. HAHA I would tell you I can get in there after hours and sit in cockpits but that might get somone it trouble so I cant
Barkin

[Barkin9]

If you ever want to come to D-town and check out the AFM let me know. I would be happy to get you set up here with the whole tour. I am forturnate to be the son of an ex test pilot stationed a Wright Patt so there are many friends still in the area. My father personaly flew 2 aircraft now parked there.
I got to start the engines on both of these aircaft as a child. Now you know why I love anything that flys!
Barkin

[Red 61]

I don't mean to be a dark cloud, but I have a question... I did a computer ethics term paper on "Killer Computers", which included the X-29. This airplane is intentionally unstable for short takeoff and landing, as well as being extremely nimble in dogfighting.

This aircraft has three onboard computers; each computer "votes" on what the control surfaces should do to keep the airplane in the air. Two computers will outvote the third. What the computer does is independant of the pilot's stick input.

IF two of the computers make an incorrect calculation, and out-vote the correct computer, the aircraft will flip around and self-destruct in 1/10th of a second! The X-29 will be traveling one direction, while the jet engine tears through the fuselage going the other direction.

Again, I don't mean to sound bleak, but I'm wondering how an R/C version of this aircraft will fly... Maybe you should install an "autopilot" module before your first flight? It's only one computer voting, but that would be better than nothing!

I wish you the very best maiden -- I've always loved how this airplane looks! :)

[Barkin9]

That is a great question Red61
The CG of the X-29 was intently set extremely far aft for maneuverability (I heard that the CG was not even on the aircraft, but i cant confirm that). The computers were needed to keep it flying straight, as a human pilot would not be able to make stick corrections fast enough, but the computer can. The F-16 is in a similar setup but not as extreme as the X-29. The designer just set the CG on the model like a normal aircraft so it flys very well.
Hope this makes sense.
I hope to have video of the 3rd flight tonight
Barkin

[Barkin9]

Foud this on the NASA site. I am using elevon settings for primary pitch control with mixed canard. I will try their setup like the real X-29 after I get som Vid

quote
"The flight control surfaces on the X-29 were the forward-mounted canards, which shared the lifting load with the wings and provided primary pitch control; the wing flaperons (combination flaps and ailerons) used to change wing camber and function as ailerons for roll control when used asymmetrically; and the strake flaps on each side of the rudder that augmented the canards with pitch control"

Any comments
Barkin

[Barkin9]

Any one thought about making the secondary pitch control thingys work? could be cool as heck
sorry I'm getting way into this X-29

[RCParkflyer]

HI Barkin,

I think it would be easy to tie in the Canards with the rear strake flaps, a single rod should do it. I'm planning on building an F-22 with the leading edge flaps and "normal flaps" coupled like that, too.

I used to live in Cincinnati back in the 60's but the family moved to Milwaukee in 69.

I have a daughter (and family) that Live in Indy, so every time I go there, I make sure I take a day and take the drive over to the "Holy Hangers" :) I've seen pictures of the shop hangers, and I know they have a tour that goes through occasionally. I have to say my favorite place is the X-planes hanger, though.

Although I have to be honest, I must have walked right past the X-29 and never saw the darn thing (It's to the left of the blue F-16, and at the time I was drooling over the XB-70 (My fav plane) and never saw the X-29, though I did get pieces of it on my pictures LOL. If I could get them to put my ashes in that hanger I would be burried there :eek: (Just park the urn infront of the X-24-B so I'm between the X-15-A2 and the XB-70)...... I'm like a kid in a candy store in that hanger.

Again, I don't mean to sound bleak, but I'm wondering how an R/C version of this aircraft will fly... Maybe you should install an "autopilot" module before your first flight? It's only one computer voting, but that would be better than nothing!

Hi Red61,

The R/C models behave a little differently then there "Real brothers" mainly due to the relative size/air pressure. This is why most of the parkjets fly good with flat plate wings, where as the real ones would never get off the ground. If the air pressure was reduced at the same scale as the model, that would be a different story entirely.

Barkin, I'd be thrilled to meet up and take a tour of the Muesuem with you, someday :) Sorry to hear of the F-18 retirement, I hope you build another one.

Tom - Milwuakee

[Barkin9]

Any time Tom The X-29 is in the musem. It is hainging up in the rafters, so I cant get in that one.

Ok 3rd flight with elevon pretty cool did an underhand launch, and putted around did some slow rolls and a loop, and some nice slow passes.

4ht flight I swiched modes to flapperon with the cannard as primary pitch control. gave myself some more control deflection and (forgot to secure the battery) all is well no crash. I like this setup much better of the 2. It was easier to trim out (besides the battery sliding around LOL) nice quick rolls and tighter loops. Still getting the feeling of this one but I did sling it around some. I will test the limits of this one in a few more flights. THIS IS A GOOD FLYER.

I will post links to the video soon as we are getting a few cold ones from the store
3rd Flight
http://www.fanfoldrc.com/gallaries/rcvideo/X29/X29-3.wmv

[Photon]

(I heard that the CG was not even on the aircraft, but i cant confirm that).

I surely hope you were kidding.
The physical definition of CG makes such a case impossible.

[Barkin9]

I was not, but now it seems foolish and wrong. I just remember my father talking about Cg's not on an aircraft, that was 25 years ago, could have been theory stuff. He was going through cg calculations for a new plane he was going to fly, and I was sitting with him asking questions. I apologize for not confirming my statements
Barkin

Here is the link to the 4th flight. I changed to flaperon configuration with the canard as primay pitch control. I liked this setup better, but I forgot to secure the battery so it was causing a few flight problems
The auto focus was messing up, and the cam is in black & white???
Ill get that fixed up next time

http://www.fanfoldrc.com/gallaries/rcvideo/X29/X29-4.wmv

[empeabee]

I was not, but now it seems foolish and wrong. I just remember my father talking about Cg's not on an aircraft, that was 25 years ago, could have been theory stuff. He was going through cg calculations for a new plane he was going to fly, and I was sitting with him asking questions. I apologize for not confirming my statements
Barkin

Here is the link to the 4th flight. I changed to flaperon configuration with the canard as primay pitch control. I liked this setup better, but I forgot to secure the battery so it was causing a few flight problems
The auto focus was messing up, and the cam is in black & white???
Ill get that fixed up next time


It looked very good, but at times it looked so close to the stall that I was holding my breath, and your lawn mowing atempt raised eyebrows from my better half..
Mike

[CRAZYPILOT]

That is a great question Red61
The CG of the X-29 was intently set extremely far aft for maneuverability (I heard that the CG was not even on the aircraft, but i cant confirm that). The computers were needed to keep it flying straight, as a human pilot would not be able to make stick corrections fast enough, but the computer can. The F-16 is in a similar setup but not as extreme as the X-29. The designer just set the CG on the model like a normal aircraft so it flys very well.
Hope this makes sense.
I hope to have video of the 3rd flight tonight
Barkin


Mayby this will help.

Kenneth

[Red 61]

Whew! Yea, that dive towards the end got my heart pumping! Glad you pulled that one off! :)

[Barkin9]

Yeah that was close. I only have 4 flights using expo so I am a bit slow to react. I'm used to having a twitchy plane. I am setting the CG per the plans do you gents thing it is a tad bit aft? I will try to keep it on the model, lol
barkin

[SX_]

sorry,,,,,,,

[MicroRotors]

Is the CG that far off? I am building one now and want to make sure it is in the spot. Is everyone’s set different according to the way they like to fly?

Thanks
Bill

[Barkin9]

I set mine about 1/8" in front of the plans. in between the 2 locations in the pic above. it flys pretty stable
barkin

[newcomer]

Dre, did the EDF ever fly?

[Dré]

Yes it did but was highly underpowerd.It had a speed 300 in a wemotek micro fan but I got a himaxx 2015-5400 brushless motor for it now that should solve the problem.My X29 should be here in 3 weeks,its still on its way over from europe to california were I recently moved to.will let ya know how it fly's as soon as it gets here.
Dré

[roccobro]

Man, your going to have to change your location under your name now. :D Where in CA are you now?

Justin

[Dré]

Justin
ya I know,haven't gotten around to it yet.I'm in willits which is about 3hours north of san francisco.
Dré

[MicroRotors]

Justin
ya I know,haven't gotten around to it yet.I'm in willits which is about 3hours north of san francisco.
Dré


Sacramento?

[Dré]

Microrotor
Sacramento is about a 2hour drive from were I'm.Your BB name would make me think you fly micro heli's(now what would make me think that humm,LOL)as well as jets,got me a couple piccolo's and love'm.
Dré

[Dré]

BAM,changed.LOL

[roccobro]

Good deal! Now we just have to wait three more weeks! :p

Justin

[MicroRotors]

Microrotor
Sacramento is about a 2hour drive from were I'm.Your BB name would make me think you fly micro heli's(now what would make me think that humm,LOL)as well as jets,got me a couple piccolo's and love'm.
Dré


Dré,

If it has any possibility of defying gravity for more than 5 seconds, or can float, Count me in. I just can't get into the RC car thing. Reminds me of sitting in traffic and in so. Cal. "WE ALL" do not want to do it any longer than we have to.

Now I'm probably going to get flamed for saying this (putting on my flame suit), but RC Cars are for the people who just can't fly. :p

[derailed]

i have an RC formula 1 for the days i can't fly in summer and a 4x4x4 monster truck for running where the race car can't and winter snow bank climbing
as for not being able to fly?
i also own 28 planes from slow parks to ducted jets,and gas 1/4 scale
just sold my 5 1/2 foot long long ranger 3 .91 glow heli

[MicroRotors]

derailed ;)

Of coarse we are talking general terms here. If you go to a hobby shop that has tons of cars and trucks just ask the customers there, the majority will tell you, nope, they could not master it.

Bill

[derailed]

cause theyre not willing
it all depends on if you want to or not
i like variety
others, will be happy with one car,one boat,or one aircraft
I WANT THEM ALL!!!!!
LOL

[empeabee]

cause theyre not willing
it all depends on if you want to or not
i like variety
others, will be happy with one car,one boat,or one aircraft
I WANT THEM ALL!!!!!
LOL
A car/truck does give instant gratification, and 4 me nearly instant boredom.
But they have a faithfull following, so it realy is one mans meat is another mans poison :D
I like to throw something round the sky, and interestingly the shocky is the one that is first to be repaired after journeys to the center of the earth!
Mnd you it gives me bad habits - no inertia, so ' normal ' aircraft catch me out - haul in full up when in doubt == instant spin on anything with a real wing and mass :(
Mike

[MicroRotors]

cause theyre not willing
it all depends on if you want to or not



I’m not so sure about that. Theirs just some folks out there that cannot, will not ever get the grasp of it. Some people no matter how hard they try and how much heart they put into it, they just cannot think in 3D and can only see things in a 2 dimensional world. And there you have your average car/truck guy. Most of them complain about the cost of flying, but to me, it seems cheaper than your high priced car/truck. The only reason flying would be cheaper, is if you didn’t have all the planes for the different types of flying. But my wife will tell you different. She says flying RC is my CRACK habit. :eek: :D

Ok, she’s right, and I guess since I can admit that, then I guess I’m on my road to recovery.

"NOT"

Thanks
Bill

[derailed]

well i know one thing
i'm printing out a set of plans for the T-38(thanks Steve)
i'll be building this one as a T-38,an F-5 and F-20
yep 3 planes from one plan
heck, i wore out 3 cartriges printing plans
i started printing over 5 hrs ago
that's alot of printing
lol
i'm not happy unless i'm building something
ha, think RC is expensive?
look at model railroading
it made a mega jump in price over the last couple of yrs
i'm over $30,000 and it's still not done
i'm building scale,with realistic scenery,fine details in scenery,structures and railroad equipment
yes my locos even have windsheild wipers,door handles,locks,and the fuel fillers,etc
and naturally RC(DCC in railroad....AKA digital command control)
controller alone was $700
so what hobby is expensive?
LOL

[MicroRotors]

Oh boy, now you sound like my brother, He lives, eats and breathes trains. He bought a 2 story home about 5 years ago and it is a railroad museum dam near. He has the garage in 2 levels and the thing runs through every room in the house, even the 2 bathrooms. No kidding! :eek: I guess it’s a good thing he is single.

Bill

[Dré]

Think of the turbine powerd jets you could build with $30,000 bucks :rolleyes:
Me personaly I love all things rc(including trains) but jets and heli's are my pasion.
Dré :cool:

[derailed]

lol
looks like i'd get along well with your brother then
my railroad is only 11 feet by 13 feet
i have an order for detail parts on its way now
lol
some,id never use but heck,i got a great deal
lol

Dre, i can just picture the turbines
problem is,one mistake and good bye
at least with trains, it doesn't crash........er.........almost doesnt crash
lol
yea i had a head on collision while running this DCC system
eack loco is completely independent and my system can handle 256 locos at one time
overkill? nawwww
hmmmmmm
i wonder how could i setup a ducted fan unit to run on the railroad
lol
what's the smallest ducted fan out there?
lol yea i wanna build one

[Dré]

derailed,
smallest I know of are gws edf 40's modified to 30mm.what scale tracks ya runnin on??
and yes,crashing a turbine powerd jet would probably be enough to make a grown man cry.
Dré :cool:

[MicroRotors]

As far as my train experience goes, all I can remember when we were little was I pulled an Adams family thing on him one day. I wired one diesel backwards polarity and when my brother saw me in front of the transformer, I let him have it, head on. Boy did I get it for that one then, but we laugh about it to this day.

Bill

[derailed]

i'm running HO scale but starting an N scale and in early planning on a G scale
now with G, i can go edf 75 but the trust is too low to pull anything
lol
HO train (http://www.derailed.8k.com/cgi-bin/framed/2317/fairbanks.jpg)

now with my layout, i don't need to rewire,i just type in the cab number,press enter then choose direction and adjust speed
so simple,yet so easy for a colision if you don't watch
hmmmm
sounds like flying a heli
lol

[Dré]

sounds like flying a heli
lol

Guessin you don't fly heli's ;) nothin but flying a heli is like flying a heli.
Dré :cool:

[derailed]

had a .91 glow heli
long ranger 3
sold it cause it stressed me more than anything
planes are more relaxing,unless i go jets
lol
hmmmmmmm
i gotta get some GWS edf75s
i just got an idea
oh oh, i hear the sound of my last pennies leaving

[Chrysagon]

derailed,
smallest I know of are gws edf 40's modified to 30mm.what scale tracks ya runnin on??
and yes,crashing a turbine powerd jet would probably be enough to make a grown man cry.
Dré :cool:

Guess you guys didn't see the video of the B52 crash at the British Nationals last year. Something like 2 years to build and 8, yes 8, turbines, everything totalled and burned.
Now that was heart rending but another one is already being built. You can't keep a good plane down.

Chas :D

[empeabee]

i'm running HO scale but starting an N scale and in early planning on a G scale
now with G, i can go edf 75 but the trust is too low to pull anything
lol
HO train (http://www.derailed.8k.com/cgi-bin/framed/2317/fairbanks.jpg)

now with my layout, i don't need to rewire,i just type in the cab number,press enter then choose direction and adjust speed
so simple,yet so easy for a colision if you don't watch
hmmmm
sounds like flying a heli
lol
<off topic>
Sounds like you need to learn to program your computer - to produce a fully interlocked real time skeduulin system - barcodes on the underside with IR readers & LCD 'next traind from ...' on platforms ;) ;)
</offtopic>
Mike

[10Thumbs]

Uh, guys, does any of this have to do with the topic of this thread? Trains, helis, c'mon, let's get back on topic here.

[derailed]

hey i'm TRAINing
LOL

[derailed]

Chrysagon
is there a vid or pics of that online somewhere?
something like that would make me retire from RC permenent

[empeabee]

Gawd now its Health and Efficiency ;)
Mike

[derailed]

have a good day too Mike

[Chrysagon]

Derailed

I think I have a vid, from a website, of it somewhere, I was there at the time but it happened so fast that I didn't have time to get my camcorder fired up.
I'll see if I can dig it out and post it.

cheers
Chas :)

[derailed]

thanks
please PM me on this?

[Chrysagon]

Derailed

Do a search for "B52 Crash" on this site and it will turn up, its in Jets-Big Jets I think. I'll post my video as it's the flight from takeoff to crash.

Chas :)

[Chrysagon]

Derailed
PM'ed you about B52

Chas

[derailed]

thanks
replied

[jmralves]

Hi folks,

I'm sure the rest of us would like to watch the video too ;)

Jorge

[empeabee]

Guess you guys didn't see the video of the B52 crash at the British Nationals last year. Something like 2 years to build and 8, yes 8, turbines, everything totalled and burned.
Now that was heart rending but another one is already being built. You can't keep a good plane down.

Chas :D
Chas
Heard a rumor that they had buried that one as well :( :( :eek:
Mike

[Chrysagon]

Mike

I hope that's just a rumour, I was hoping to see it at the Nats.
If it's true I wouldn't blame them if they called it a day.

Chas

[derailed]

all RC flags are at half mast for that bomber and RC crew

[beanie]

is this the crash (video 4)?: http://www.mcgirt.net/RC/VIDEOS/Giant_B52/
-beanie

[Chrysagon]

Beanie

Yes that's the crash but the video I have is longer and shows the take off and turn, also, it doesn't shake.
My ISP doesn't seem to allow hosting of videos, at least I can't find a way to do it, so if someone would host it for me I will gladly e-mail it to them.

Chas

[empeabee]

Beanie

Yes that's the crash but the video I have is longer and shows the take off and turn, also, it doesn't shake.
My ISP doesn't seem to allow hosting of videos, at least I can't find a way to do it, so if someone would host it for me I will gladly e-mail it to them.

Chas
Upload it into your personal RCGroups Gallery.
Mike

[Chrysagon]

BTW guys

I didn't mean to hijack this thread, I don't want to upset anyone who wants to read about the X-29 . Maybe this should be continued on another thread, I will start a new one called 'B52 Crash'

Chas

[Chrysagon]

Mike

Will do, didn't know it was possible.

cheers
Chas

[Chrysagon]

For anyone interested
I just uploaded the B52 crash video into the Thread of the same name.

cheers
Chas.

[Starlancer]

Anyone know where I can find them .It seems at foamy I am unable to d/l them.
Any help would be great
Thanks!!

[RCParkflyer]

www.parkjets.com/free-plans.html

[RSteel]

I finally finished my X-29 and am eager to fly it. I have the Flight Controls setup as such:

Flaperon:

Ailerons: +- 1"
Canards: + 1.5" - 1"
Flaps -1"

RTF weight: 14.2 oz.
Powerplant: GWS EPS350, 3 cell/11.1v/1200 mah/Lipo
Pixie 20P ESC

Hopefully, I will have some GOOD video for you and not video of me crashing into either the ground or uprights :eek:

Its been done....


Here goes nothing..

Ray

[RSteel]

http://home.surewest.net/rayb/Pics/RC_Projects/X29/DSC01055.JPG

http://home.surewest.net/rayb/Pics/RC_Projects/X29/DSC01056.JPG

Lets hope she stays this way ;)


Ray

[RCParkflyer]

she looks Great Ray, best of luck on the Maiden!!!

[empeabee]

Best of luck - especially after the Gripen... :eek:
Mike

[roccobro]

Good luck!

Justin

[RSteel]

Well all,

After about 5 flights today, I have come to the conclusion of....

I just dont really like the way it flys.

Don't get me wrong and all, I like the sinister look of the plane and the whole fwd swept wing thing but...I just dont like the way it flys. :(

Launch was very simple and straight foward. Before I launched with power on, I had a friend hold the aircraft nose up and I applied full power. Yup, nice big torque roll to the left wants to happen here. After applying several clicks of right roll and nose up, we were ready. Launching was uneventful and the aircraft flew straight and rose into the sky.

Banking the aircraft was on a dime and it swung around beautifully on its edge with little to no nose droop. After leveling off, the aircraft continued to rise. This was beginning to become a problem as I am now constantly trimming nose down and fighting a porpoising effect. CG was set at 1/4 and 3/8" in front of the wing L.E. Same problem, this X29 wants to rise into the air and keep rising. After appying nose down, she wanted to keep nosing down until aft stick was applied again and we start the process all over again.

Turning into the wind, I decided to try and do a loop. After all it does want to go up right? Pointing the nose down I gained some speed and pulled the stick full aft. Yup she shot straight up like a rocket and wouldnt quite turn over until it stalled. :confused:
I tried it again, and still the same effect. No nose over onto its back.

Hmmmmm....

Ok, lets try a few rolls. This time I thought, I wasnt getting enough speed. So I turned with the wind and sling shot it foward. Slight nose up, full stick left, the wing dips down, the nose drops, and the tail slides around :confused:

Try again, same effect. Dont know.

Land, pack up go home.

Mabey I'm doing something wrong, dont know.

I think the wing surface at the tail is to wide and has too much surface area to be trying to throw around. It acts like a belly heavy aircraft in flight with the hard to roll, hard to loop and tail sliding. The flap strakes should be incorporated and mixed with the carnards giving more elevator authority to play with.

Kudos to the designers of this model as its a feat to build an inherently unstable wing design into a foam pusher. I'm glad I built and flew this one. My curiousity is satisfied. I guess different strokes...

If anyone as had a different view please post your setup, throws and conditions so that I can give it another go..until then back to building a new Gripen ;)

Ray

[empeabee]

Well all,

After about 5 flights today, I have come to the conclusion of....

I just dont really like the way it flys.

Don't get me wrong and all, I like the sinister look of the plane and the whole fwd swept wing thing but...I just dont like the way it flys. :(

Launch was very simple and straight foward. Before I launched with power on, I had a friend hold the aircraft nose up and I applied full power. Yup, nice big torque roll to the left wants to happen here. After applying several clicks of right roll and nose up, we were ready. Launching was uneventful and the aircraft flew straight and rose into the sky.

Banking the aircraft was on a dime and it swung around beautifully on its edge with little to no nose droop. After leveling off, the aircraft continued to rise. This was beginning to become a problem as I am now constantly trimming nose down and fighting a porpoising effect. CG was set at 1/4 and 3/8" in front of the wing L.E. Same problem, this X29 wants to rise into the air and keep rising. After appying nose down, she wanted to keep nosing down until aft stick was applied again and we start the process all over again.

Turning into the wind, I decided to try and do a loop. After all it does want to go up right? Pointing the nose down I gained some speed and pulled the stick full aft. Yup she shot straight up like a rocket and wouldnt quite turn over until it stalled. :confused:
I tried it again, and still the same effect. No nose over onto its back.

Hmmmmm....

Ok, lets try a few rolls. This time I thought, I wasnt getting enough speed. So I turned with the wind and sling shot it foward. Slight nose up, full stick left, the wing dips down, the nose drops, and the tail slides around :confused:

Try again, same effect. Dont know.

Land, pack up go home.

Mabey I'm doing something wrong, dont know.

I think the wing surface at the tail is to wide and has too much surface area to be trying to throw around. It acts like a belly heavy aircraft in flight with the hard to roll, hard to loop and tail sliding. The flap strakes should be incorporated and mixed with the carnards giving more elevator authority to play with.

Kudos to the designers of this model as its a feat to build an inherently unstable wing design into a foam pusher. I'm glad I built and flew this one. My curiousity is satisfied. I guess different strokes...

If anyone as had a different view please post your setup, throws and conditions so that I can give it another go..until then back to building a new Gripen ;)

Ray
Congrats on the maiden+4 - no lamp posts this time :D
The non-loop sounds like the canard is stalling, or at least running out of authority(spell :confused: ) at low air speed.
The pitch instability could be cog or could be the wing twisting under load.
( I'm not a hairydynamiteist, just my random feeling )
ISTR that the real ship had an elevator coupled to the canard.
Mike

[Barkin9]

I had the same problem with loops; I was able to get it to roll when I increased the aileron throws. I did try different mixing. I would only use canard mixing when doing high alpha passes or landing. To fix the pitch up I mixed throttle and down canard and that did work well. Maybee the Model needs more thrust and speed than my little BP-21 can give. My buddy has a Himax I can test it with I'll give a report

[RSteel]

Ya know, I never thought of mixing the canard with the throttle for pitching problem.

Thanks.

[hate]

hey guys...

are these 3d foamy pusher jets (x-29, f-18. f-15, f-14, etc..) able to take off from the land if i put some wheels on it ?

[Photon]

They can, but you have to make sure it sits high enough for the prop to clear the ground. Also note that when rotating to take off, the prop goes even lower.

[derailed]

if you dont want to toss to launch,
how about a small catapult?
you can lauch then kick to full power once the prop clears
would mean installing a hook tho
think of it as a carrier launch
lol
i'm gonna make a catapult and mount it(bolt it) to the roof of my half ton van
that way i just point the van into the wind,step out,place the jet,and fire when ready
besides, it will alrady be 6 feet above the ground at launch allowing for correction so less chances of contact with the ground

ok so it will get people curious when i'm on the road
maybe i should make a safety cover for it while im at it
lol

[hate]

i don't know, but i think the cool thing is to taxi the plane, get ready to the take off, and take it off properly....

[derailed]

well, theres always convert to brushless ducted fan and you wouldnt need to worry about prop strike

[hate]

well, theres always convert to brushless ducted fan and you wouldnt need to worry about prop strike


well that i'd like to use some ducted fan, but i have heard too many bad things about it, not enough trust, not enough speed, etc....

[newcomer]

here's my version:
razor 400;cobri 3.5:1 box;8x6 apc; 1320 TP 3S.
still needs bungee hook, batt box and weathering on left side.
didn't stripe the bottom- burnt out on the top :eek:
david

[Arbo]

Nice. Looks really good.

[RCParkflyer]

Very Nice Looking!!!
Can I put that on my X-29 page?

www.parkjets.com/x-29.html

Tom - Milwaukee

[newcomer]

Tom,
be my guest. canopy isn't finished because i haven't decided to paint the foam one or pull a clear one.
david

[The Enemy]

Tom,
be my guest. canopy isn't finished because i haven't decided to paint the foam one or pull a clear one.
david

Still looks really great!!!

C.

[DCobra]

That looks freakin awesome!

Is jazsop selling precut kits of this one?

Have you flown the maiden yet? Good luck!

Paul

[newcomer]

Paul,
thanks for the compliment. no maiden yet. too cold here. i believe Jazsop will let you special order this one from his 6mm website.
david

[DCobra]

Thanks David. I actually had one home-cut from 3DFoamys plans already that I couldn't get to fly right and finally stripped the electronics and smashed it in frustration.
I hope your experience with her goes better than mine, and after seeing yours with the awesome finish I'm feeling the temtation to build another or scratch my own design out.

Keep us posted and best of luck.... the design DOES fly...I just had problems with my own.

Paul

[newcomer]

Compulsive detailer. couldn't stop myself