R.I.P. Jenny 20% Jenny Coming! Flown Today! 9-20-08

[LBJ]

It'll be there!

[steve1814]

Quote:
Originally Posted by karl k

It has come to my attention that the resulting spike in voltage when a large current draw is removed from these batteries is enough to fry the Castle controllers.Karl


Karl,

I really don't understand your statement. What voltage spike would I get from drawing 90 Amps out of the batteries?

Cheers,
Steve

Well, I had to find out what in the world Karl was speaking of and I found a few threads that spoke of this..

http://www.rcgroups.com/forums/showthread.php?t=941714

http://www.rcgroups.com/forums/showpost.php?p=10789716&postcount=8

http://www.rcgroups.com/forums/showthread.php?t=940253#post10790155

I can agree with what Karl is talking about, but I really hope my 40 Volts input (12 A123's) will not cause the ripple in a controller capable of 50 Volts continuous, sag or not....But, I will do some bench testing-you bet!

[karl k]

It's not when you draw the current, it's when you reduce the throttle.

The cell voltage 'bounces' back up above the nominal voltage enough too cook the controller.

Karl

[LBJ]

Went to a local all electric meet on Saturday. A local photog "Ronnie" had his long lens camera and took this shot. I thought it was pretty cool. Ed Couch doing the flying duties for me.

http://img.photobucket.com/albums/v228/numskin/tbirdmeet1.jpg

[Ed Couch]

Gents

Go to attached site (page 4) for a number of other shots of Lane's Jenny. It was my luck and pleasure to fly the big bird for Lane (He needs to be flying her himself). I'll gladly do the honors any day though. He also didn't tell you he took a couple trophys home as a result of the flights as well. She rolled, she looped and showed her stuff, just a great lady. I even got lucky on all the landings. Got a one hopper on last flight but others were grease jobs. Thanks Lane for the pleasure. ed :)

http://www.rcgroups.com/forums/showthread.php?t=925746&page=4

[steve1814]

Gents

Go to attached site (page 4) for a number of other shots of Lane's Jenny. It was my luck and pleasure to fly the big bird for Lane (He needs to be flying her himself). I'll gladly do the honors any day though. He also didn't tell you he took a couple trophys home as a result of the flights as well. She rolled, she looped and showed her stuff, just a great lady. I even got lucky on all the landings. Got a one hopper on last flight but others were grease jobs. Thanks Lane for the pleasure. ed :)

http://www.rcgroups.com/forums/showthread.php?t=925746&page=4

ED/LBJ,

Was this with the 22" prop on her? Any noticeable performance gains?

Cheers,
Steve

[LBJ]

Yes, it worked great. Batts were hardly warm after both flights. I balanced it carefully first, of course. That was a 22x8 I believe. But, to ad to the mix, I used a new set of Rhino 3700 4S Batts too (three 4S pacs). These are much heavier duty than the Common Sense jobs. The leads are 10 ga vs 12ga and even 14 ga on C.S. They really deliver more power.

[LBJ]

Steve, what's the latest on the Jenny?

[Tipover]

Steve, I’m wondering what happened with the Jenny as well?

Was looking forward to hearing how the Jenny balanced with the A123 cells in the nose. I’m thinking of doing one of these using 10s2p or 10s3p A123 cells. I already have several 10s1p packs, so it’s simply a matter of how much nose weight needed to balance.

Was also wondering if it would make more sense to go with the 249kv version of the UH motor? I’m guessing 26-27 volts under load with 3p, so the 170kv seems very low. 249kv should be good for 6k rpm. I have an older Jeti 90 speed control that should work, just need to prop for under 90 amps WOT. I’m thinking this plane should fly fine on 2400 watts?
What do you guys think?

Kevin

[steve1814]

Steve, I’m wondering what happened with the Jenny as well?

Was looking forward to hearing how the Jenny balanced with the A123 cells in the nose. I’m thinking of doing one of these using 10s2p or 10s3p A123 cells. I already have several 10s1p packs, so it’s simply a matter of how much nose weight needed to balance.

Was also wondering if it would make more sense to go with the 249kv version of the UH motor? I’m guessing 26-27 volts under load with 3p, so the 170kv seems very low. 249kv should be good for 6k rpm. I have an older Jeti 90 speed control that should work, just need to prop for under 90 amps WOT. I’m thinking this plane should fly fine on 2400 watts?
What do you guys think?

Kevin


Hi guys-Happy New Year to you all!



I took a brief hiatus from the hobby for a while. I'll be back at the Jenny soon! Kevin, I'll be running a 12S2P A123 setup so the 170Kv is good for me, but as you are running fewer cells an increase in Kv is good. If you can get 2400 watts that should fly the jenny quite nicely:). I am going to have to modify my motor box, or build a new one to accomodate the four 6 cell packs I am going to use....

Cheers,
Steve

[Tipover]

Steve, thanks for chiming in. Nothing wrong with taking a break form the hobby once in a while.

I’m now considering the Eflight Power 160. Downside is its even lighter than the HXT80-8, I understand this plane needs all the nose weight it can get. I’ve been reading of bearing issues with the HXT motors, so I’m getting cold feet on ordering one.

LBJ, any issues with your HXT bearings yet?

I'm also wondering how the landing gear is holding up on the Jenny? Seems like a very rigid setup, and that it could bend or break with not much give.

Kevin

[Ed Couch]

Tip

I have over 3 dozen flights on an 80 by 85 HXT motor with no problems and I fly it hard in a large GeeBee Y on 8 to 10 cells. I know of no problem with Lane's Jenny as well. I have a large P-47 Jug (Hanger 9 1/5th scale) flying on the 80 by 100 motor and as in the first one both Lane and I have replaced all bearings with ceramics for about 50 dollars per motor. Except for a magnet coming loose in a couple of smaller Turnigy or HXT motors I have had no problems with the Hobby King motors. Lane had three magnets come loose in an E-Flite 46 a couple of days back and a little epoxy put everything back together and we test flew it yesterday in 40 degree temperatures and 20 knot winds. Too damn cold for this Texan and we went back to house to work on other projects. ed

[Tipover]

Ed,

Thanks for your comments. Makes me feel a little better. UH now wants $36 for express mail, so that brings the motor cost up to $175, plus maybe $30-50 for new bearings. No longer such a cheap motor, yet it still seems to be a very good choice for the Jenny because of the nose weight issue. I also like the simplicity of the mounting.

I wonder why Hacker backplate mounts everything but the A60 series? Seems odd.

Kevin

[Tipover]

I just noticed the 80-85-A 249kv motor has a 1700kg shipping weight, the 170kv is 1500kg. This is whats bumping the shipping cost up. Yet in the specs they say they both weigh the same :confused: Very strange.

Kevin

[LBJ]

I have the same motor in my 1/5 scale Zero. I went ahead and replaced them before first flight. Turns out the slight "feel" it had was a bad front bearing. Deifinitely bad. So replaced them all. first flight on that was absolutely great! Ed Couch flew it great and everything worked as planned. As I recall, the Jenny motor has been fine from the start. We have only flown it a few times at two meets.

I'm going to larger batts on the Zero. It will easily hold 4900's so it will go two "6 packs" for longer flights.

[Tipover]

Appreciate all the comments.

We will definitely fly the Jenny more than you guys have been ;) 4-6 flights per day are very common during our somewhat short WI flying season. I also fly in my back yard a lot, that tends to make you into a chain flier :D

The HXT 80-85 looks like a good value even after the added cost of changing the bearings out. I need to call Hobby City later and see what’s up with the shipping weight difference between the 170kv and 249kv motors. Anyone running the 249kv version? I’m wondering if it will get along ok with my Jeti Advance 90 controller?

Kevin

[steve1814]

Got the Jenny back down from the rafters and started to work up the C/G with the batteries. Looking at the main Aluminum Wing Tube as a balance point (it is just behind the main spar), I was able to get the Jenny to balance perfectly by using spiderwire (150lb test Kevlar fishing wire) tied to the tubes and then hoisting the plane up off the deck with a standard rope and ring tied to the spiderwire. My setup has 24 2300mAh A123 cells in a 12S2P flying configuration (4-six cells packs for charging) and I needed no additional nose weight. I didn't take pictures because I thought I was going to be real tail heavy :o.

I won't be building a battery box, as I will not need one. I am just going to have a flat tray with Velcro that I will mount on top of the supplied motor box. I liked LBJ's cowl mod, so I will attempt to copy his design. I figure the extra wood, the ESC, wiring, assorted hardware and glue will get me a little nose heavy, just where I want to be. The receiver battery (a 2100mAh 2 cell Lipo and voltage adjuster), along with the Receiver will be on the C/G, with the ability to adjust as needed. I'll be flying her with a 22 X 10 APC-E prop that may get replaced by a Xoar wooden electric in the future.

I'll post more pictures as I get more done.

Cheers,
Steve

[Tipover]

Steve- Great news that the A123's balanced it with no additional nose weight.

Mine got put on hold. I had one here but ended up sending it back because of way to many quality/damage issues :( I still want one, thinking about giving AHS a try.

Kevin

[steve1814]

Did some work on the Jenny today. Got the battery tray built, mounted the ESC and cut the cowl.

Cheers,
Steve

[Wind_of_Change]

Do you guys feel that the yellow Turnigy 80-85 still needs to have the bearings changed?

I had a 63-74 HXT that was a horrible motor and I could never get it to fly right. It had so many issues, bell coming unscrewed and grinding against backplate (lack of glue to hold it on) as well as screeching sounds and bearing issues. I replaced it with the gold Turnigy 63-74 with the same specs and it worked great. I haven't had those issues.

I was curious if you felt like the 80-85 was a problematic motor. I was planning on putting it on my 25% M12 Pitts Bipe (cox), which is about the same size and weight as the Jenny. I would seriously have no idea how to order & replace bearings for this thing, and I'm not in the mood to screw around with a big motor hoping to fix something that should work out of the box.

Also, I'd like to fly the Pitts fast rather than slow. The Jenny will look great slow, but the Pitts just looks like it wants to go fast. Do you think I should go with the 80-85 250kv motor instead?

Thanks,

Todd

[Geoff Dryer]

I run the HXT 100-100-130 in my Hangar-9 Sukhoi. I had to change the bearings after 3 flights but 30 flights later no issues. I run a 27x10 propeller and get about 40 lbs of thrust on 12S. The motor get warm to the touch. Overall I am very pleased for $150.00. We have many Turnigy motors turning in our electric club and other than a few bearing changes they all work fine.

[LBJ]

I just ordered two sets of bearings for the big Turnigy motors. Had a crash and shattered the front 2 bearings so I got 10 of each. These are SS vs ceramic. I can send you a set if yiou like free of charge. Let me know your snail mail address and when they get in I will drop you 2 fronts and 1 rear. I feel they are the same as the 80-85. if not don't worry about returning them.

Be sure to add the rear alum collar to keep it from creeping forward under power. Also, a drop of light LocTite would help on the set screws on the front that hold the shaft in place. Keeps the shaft from creeping forward under load. Hit them with a solder iron to soften the glue to remove them.

If you are getting any rough spots or noises from the motor, then change them out before you fly. I spotted a bad bearing on the motor for my Zero right off the bat. Took it apart and the inner front bearing was bad. I could feel and hear it before hand.

They are due here in a few days, so hang in there!

As far as changing them out, it's not that bad. Of course, having done it the first time helps, so I can pass that along to you. Take the rear collar off, the rear retaining ring and washer. PULL with a lot of force on the front half of the motor. Once you overcome the force of the magnets, it will come right forward and off. The bearings MAY have a bit of glue on them to hold in place for assembly. Take a dowel and go thru the front and rear bearings to gently and evenly tap the bearings till they drop out. don't over do it or get in a hurry. They come out. You want to keep them coming out evenly so as not to get them caddy whompus and jammed. Clean the recesses and replace the bearings and reassemble. Be CAREFUL when replacing the front half of the motor! If your fingers or hands are between the halves when it gets going the magnets will pull the parts together with them in there. No permenant damge, but it smarts.

One more thing. NEVER hit the steel shaft with a STEEL hammer. Always use brass, leather, rubber, plastic etc. Steel will deform the steel and you will not be able to remove or replace the shaft without fixing it. No need to use a hammer anyway as it DOES come apart fairly easy.

[Wind_of_Change]

Huge thanks LBJ! PM sent with address.

Do you mind my asking where you order bearings for these motors?

When you say SS vs. ceramic, I'm not sure what SS means. What does SS stand for?

I just can't decide which of the 80-85 motors to order. They just got new stock in on the 170kv, so I know those are going to be the gold turnigy. But I'm not sure if they've moved the 250kv motor stock enough to get rid of the old purple ones. It had some bad customer notes about the high KV being unrealistic, which may have slowed sales. Anybody order the 250kv motor, and was it Turnigy when it came?

Grr, tough choices.

[LBJ]

Todd,

SS is for Stainless Steel.

Purchased from:
NationSkander California Corp
2165 S Dupont Dr Ste F
Anaheim CA 92806
UNITED STATES
714 442-2740
http://www.vxb.com

Ceramin bearings are supposed to be the cat's meow for some reason. But, I will settle for SS this time around. Sent you a message.

I'll go check HC's stock as I need some more BIG motors myself.

[steve1814]

I am ashamed to admit that I have not flown the Jenny yet.:o I got sidetracked by some other projects and I am just now getting back to her.

Revisiting the C/G, I know you guys running the Lipos are having to put weight up front to get her to balance, but I seem to have the opposite problem. after getting a replacement 100HV controller I started finishing up the odd/ends so I can do the final adjustments on the C/G. Using my wing tube as the C/G point again, I swear she seems nose heavy! The A123's weigh 4.45lbs up front so I thought I would be good. I am having to resort to putting the RX pack (3S 1300 -heavy- Lipo) all the way in the back, just above the tail wheel to have the tail sit a little more neutral. I know the wing tube is not @ the recommended C/G balance point, but it serves as a quick, one person test. Maybe I am too heavy? My roughly calculated AUW is 22-23lbs

Since I ordered a 100Hv ESC for the Jenny I thought I'd "fly" her around the yard. With the wings off, she was really nose heavy, so I had to bring up the throttle slowly. Performance seemed good, but I didn't spec her because the batteries weren't fully charged. After the test I did notice that the motor seemed to drag when I spun the prop by hand back on the bench, and now I think the bearings are starting to go:(. I guess I'll have to take the motor out and replace the bearings, it sure seems like they are about to seize. -LBJ, you remember the dimensions off the top of your head? I guess I'll put some more epoxy on the magnets while I have the motor apart-might as well.

Other than that, she is ready for flight:rolleyes:

Cheers,
Steve

[LBJ]

Steve, I have been busy on a family emergency. ANy other time I could think straight. But not right now. I'd have to go measure them. I may get a chance on Monday if I can remember it. I can send you a set if you like since I ordered ten of each front and rear bearings. No problem. Send me a private message with your address. CG is pretty much what they called for in the guide. I'd have to check that one too. Just too groggy right now to remember. LBJ

Found the e-mail of my order. Sizes are shown here. 12x24 is rear (1 only) and front is 12x21 times 2. This is for stainless steel. Ceramics are MUCH more expensive.

kit806 10 Bearing S6801-2RS 12x21x5 Stainless:Sealed 1 $39.95 $39.95
6901-2RS 10 Bearing 6901-2RS 12x24x6 Sealed 1 $29.95 $29.95

[steve1814]

So, the Jenny is being a primadonna about the conversion and while I was mulling over what I can do to get the balance to work out a song kept playing in my head...That distracted me enough, so I re-wrote the lyrics to match my dilemma:


Sing to the tune of the 80's song 867-5309 Jenny Jenny by Tommy Tutone



Jenny Jenny who can I turn to
you give me so many challenges I want to scrap you
now you think I'm like the others before
who will try to fly you on a chainsaw mo-tor



Jenny I can’t find the number
I need to make you balance on a dime
Jenny tell me the C/G number
Is it 8, 6, 7 inches or maybe 9?



Jenny, Jenny thought you were the plane for me
you don't know it, but flying you electric would make me so happy
I’m trying to convert you from a slimer but you’re getting on my nerves
I found that you’re too nose heavy and now I am perturbed



Jenny do I have enough lumber
I need to get it right this time
Jenny tell me the C/G number
Is it 8, 6, 7 inches or maybe 9?



I got it, I got it, I’ll cut a bigger hole in the firewall
I got it, I got it, I’ll mount the batteries further back so she won’t stall



Jenny the A123’s changed your all up number
I need to make you fly
Jenny don’t be a bummer
8 cell batteries won’t give much flyin’ time



Jenny Jenny 12 A123’s maybe - at least no less than 9
for the price of 3 dewalt packs I can always convert you


Well, I thought it was funny:p

Cheers,
Steve

[BrentP]

So did I Steve :D . Weird Al would be proud.

[steve1814]

Thanks to Lane (LBJ) I now have a very smooth turning motor. Just want to tell everyone that I appreciate not only the bearings, or the super fast shipping but also that Lane did this out of the kindness of his heart all during a personally stressful time.

Thanks Lane!:cool:

Now back to the C/G.....8,6,7 inches or maybe 9?:D

Cheers,
Steve

[steve1814]

Well, she is finally finished. yeah, took way too long, but better late than never. Hopefully the weather will cooperate on the memorial day weekend for her maiden. For now, I took some snapshots after her taxi test. You will notice that the batteries are now further back, and this gives me the perfect balance. She came in at 25 lbs AUW.

Cheers,
Steve

[Tipover]

Looks great, nice details. Love the in-the-firewall battery harness and the hatch straps :)

Kevin

[LBJ]

Steve, That detail looks really good. Great job! LBJ

[steve1814]

Hey thanks guys. The straps serve the function of holding the battery hatch in place so I thought it would look cool if I tried to make it "scale". With the batteries located where they are now I wanted to make the wiring to the ESC short and still have my arming switch (located in the front cockpit instrument cluster) so doing the deans panel was a good choice (and I thought it looked "neat") and prevents any mis-wiring in the parallel/serial configuration. I really didn't like the large windscreens so I cut them down to make it look a bit better and the pilot...well, I just didn't want a clone flying around.

LBJ, you ever weight yours? I am curious as to my 25lbs being heavy or about where everyone else is at.

Saturday morning looks like my only day for the madien...wish me luck!

Cheers,
Steve

[LBJ]

I weighed it and seems like it was about 25 pounds too. Been too many months ago to remember for sure though. It will carry 25 pounds for sure. Good luck on the flight.

[greggk]

Guys thanks for the inspiration, I was thinking of getting the 50" but this one is WAY to awesome so I guess Ill try and hide another $100 purchase from my wife :D

My hanger consists of 90% planes on floats/flying boats b/c my close proximity to H20 over the local field. I have been wanting to put a WW1 biplane on floats, well if I buy this one Im gona try it. Has anyone seen one, I seen full scale ones with the single and double float verities.

Any thoughts or suggestions?

[steve1814]

It's taken me a week to get the video up, and while it is long and boring, I couldn't have been more excited!

She flew very well, even though she flew with her tail dragging....yes, even though I changed everything around because I thought she was nose heavy, it turns out that she needs more nose weight. She was still very manageable, and I'll correct the problem by rebuilding the original battery tray.

All three flights were easy. One thing I did notice is the motor was still tight and got really hot, which I found that odd. Once I got the airframe home I took the motor off and disassembled it. I did find that the shaft was a little too far forward and was binding the c-clip. I loosened the shaft screw, gave a couple light taps and voila, after reassembly she spun better than ever!

I did some static tests for curiosity (and to make sure the motor wouldn't get tight again) and got 2458 Watts @ 73 amps static WOT. Static thrust was 20.5 lbs with a fish scale. The motor sounded much better and I feel that she will have even more power the next flight.

Enjoy the video:

http://vimeo.com/4908316

Cheers,
Steve

[LBJ]

LQQks good Steve. Congrats on the flights.

I need to drag mine out this year sometime. Several meets coming up so may get a chance to do it. LBJ

[badboy14]

hello , i am hoping to buy one of these planes and need some info on them like servos and battery information , such as how many mah and about how long will it fly on the amount i was thinking of 10,000 mah and 10 cells swinging a 20x10 prop at 7300 rpm or close to that i am some time away from the build but i hope to get the plane ready and built then just pop in the power set up thanks , joseph

[steve1814]

hello , i am hoping to buy one of these planes and need some info on them like servos and battery information , such as how many mah and about how long will it fly on the amount i was thinking of 10,000 mah and 10 cells swinging a 20x10 prop at 7300 rpm or close to that i am some time away from the build but i hope to get the plane ready and built then just pop in the power set up thanks , joseph

Standard servos are fine on the Ailerons and since this is a pull/pull setup, I recommend that you have the BB's on the rudder and elevator since the servos will always have pressure on them (unless you run a bellcrank)



Mine flies fine on a 22X10 APC-E prop with 12S2P A123's (about a 10S lipo equivalent) with only 4600 Mah. I can get 5 -7 minute flights on that, so your 1 Ah batts should last twice as long if not up to 20 minutes provided you run a similar setup and don't go WOT all the time.

Hope that helps, she really does fly like a big trainer, even at 25 lbs.

Cheers,
Steve

[badboy14]

10 ah lol yes i think i will be under 25 pounds ,i have a knack for keeping things light weight i plan to fly it in a scale manner :D love scale planes but never seen one that really suited me until i stumbled onto this thread I love vintage style planes thanks for the quick reply :) im moving out to the country and farmland so i thought it would be cool to have the plane fly low over the fields like in the early 1900's i'd love a tiger moth but couldn't find a decent one to fly i think for this one i will airbrush some of my own touch to it

[steve1814]

:) im moving out to the country and farmland so i thought it would be cool to have the plane fly low over the fields like in the early 1900's i'd love a tiger moth but couldn't find a decent one to fly i think for this one i will airbrush some of my own touch to it

Make sure you take pictures!

Cheers,
Steve

[badboy14]

oh yea im getting a new hd camera :) next month on my b- day gonna be awesome sweet 16 present a big 20% jenny :D :D

how would you hook up the lipolys for this plane ?? i have an idea but iv'e never done a project of this size
if i have three ,four cell batteries that are 5000 mah wired in series and three more wired in Parallel hooked up to the series pack that is 20,000 mah isn't it because 5000 x 3 parallel is 15,000 plus the 5000 of the series pack
and 6000 mah packs would be 24,000 wouldn't it ??? i have no idea lol :D

[steve1814]

oh yea im getting a new hd camera :) next month on my b- day gonna be awesome sweet 16 present a big 20% jenny :D :D

how would you hook up the lipolys for this plane ?? i have an idea but iv'e never done a project of this size

Two 5/6S1P or any combination that gets you the desired 10/12 cells in series (Two 4S1P's & one2S1P's etc...) as long as the batteries have the same history/brand you’ll be fine. Hooking up battery packs in series is as simple as connecting the positive side of the first battery to the ESC and the negative side to the positive side of the second battery and then the negative side of the second battery to the ESC. If you have more than two batteries that you want to run in series then just have the negative side of the second battery connect to the positive side of the third battery and the negative side of the third battery to the ESC...and so on, and so on. Paralleling batteries give you more Mah per pack in series and then the packs are just positive to positive and negative to negative and the combined packs are then connected to the ESC. You can run series and parallel together.. ie: Four 5(series)1P(arallel) that are 4000 mAh's in a series parallel configuration will net you a 10S2P 8000 mAh Pack. (two packs in series, two packs in parallel) You'll want to study the build log that LBJ started and I injected into for ideas on where to mount the batteries and how to hook them up. I suggest that you cut your cowl the same way as we did, as that is the best way to get access. Don't be shy on the batteries as far as mAh goes...if you can get 10,000 mAh to fit, use it - you'll need the weight.

Cheers,
Steve

[badboy14]

all the batterys are the same and I"m buying all new,
do you know the link to his build log ??
thanks Steve

[steve1814]

all the batterys are the same and I"m buying all new,
do you know the link to his build log ??
thanks Steve

you are posting in it! start on page one, post #1. I am afraid this is all there is:o

Cheers,
Steve

[badboy14]

lol that's what i get for being up too late and trying to post :o

[greggk]

Well just got one of these... 2 big boxes :) My plan is to put her on floats. I'm not sure if I'm gona do it scale with the mono float or make it easier with a two float set-up. Either way I want to lighten it up as much as possible because of the floats... Just going over the instructions and parts (it will probably be months before i actually build it) they seem heavy with the wires, cabanes, wheels, bolts, gear, etc... Have you guys who have built it come across any techniques to lighten it up. Do you need all the metal bolts to attach the tail and wings? Could you glue the tail and use nylon bolts for the wing? Are all the wires aluminum or steel?
With the short coupeling of the plane, is electric or gas/glow the lightest way to go. I like electric for the obvious reasons but like the gas/glow only for the sound...

Any ideas, input is greatly appreciated.
Thanks

[steve1814]

Either way I want to lighten it up as much as possible because of the floats...

Any ideas, input is greatly appreciated.
Thanks

Greg, In my opinion, loosing the landing gear is probably the only thing you'll need to do to "lighten" her. Trust me, @ 25 lbs, she floats on air!

I thought about just gluing the empanage on myself when putting her together. As long as you don't need to take it apart for some reason I don't see any weakness from just gluing it. As far as gas/electric, -you do need weight up front, so it was a great conversion. The airframe is light, and I don't know how well it will hold up to that vibration....someone with IC engine experience probably could answer that better. I do believe there was a long thread over at RCUniverse on the Gas version.

Cheers,
Steve

[badboy14]

the sound systems from here ( http://www.modelsolutions.ca/catalog_sound_systems.htm ) are amazing i saw a video with ww2 fighters flying with these systems in and they really sounded like their full scale counterparts the engine is about 7 pounds and my estimated set up for batterys is 7 pounds -/+ a few ounces and that is with 24,000 mah (24 amp hours)

[greggk]

Hey guys, sorry to be a pain... I have a favor to ask you. Someone is going to cutout some floats for me for this bird. He needs a couple of measurements from me and I'm nowhere near the assembly of the plane.

I need the measurement from the prop to the CG. That's it I think.

http://www.seaplanesupply.com/oldtimer.htm
I was going to do the mono float with tips but I think a tri-float setup would work much better.
http://sopwith-aeroplanes.com/Main_Floats.html

THANK YOU

[LBJ]

Final resting place of the lady. RIP Jenny.

http://img.photobucket.com/albums/v228/numskin/IMG_0372-1.jpg

[BrentP]

Final resting place of the lady. RIP Jenny.

Did I miss something? You crashed?

[LBJ]

Yeah, go back a page or two. Battery came out of the plane in a roll. That's all she wrote. Wel actually, I made a new thread of the crash info.

[Wind_of_Change]

I like the tail trophy idea. Mount that with a picture of you with the plane ... for memories sake. I should start doing that. Of course, then it's a testimony to all who enter your trophy room as to just how much time and money you've wasted on toy airplanes. :)

It's like stuffing a favorite pet or something.

Sorry for your loss.

[LBJ]

Thanks, "it's all in the game" as the song says. Gonna crash some. I'm glad it was not due to dumb thumb. Just poor preflight inspection. Maxford has them on sale again for $603 shipped. I may get another one yet! She flew great and won several awards for me. Hard to beat that! LBJ

[parkpilot101]

So did I Steve :D . Weird Al would be proud.
My friends uncle is weird al. That isnt a lie. I swear.

[LBJ]

Got another one coming in. Great flying bird. This one will be a bit different. Going to use the 80-100 motor and have 2, 2000 MaH battery packs wired in parallel, glued and screwed into the airframe!!! Staying with 2, 6S 5000 MaH Lipo's and Turnigy 100 amp SC. Slow as Christmas in assembly, but may have it done later this year. Should go faster since I have one under my belt

[steve1814]

Welcome Back!:D

[JMBRAD]

Got another one coming in. Great flying bird. This one will be a bit different. Going to use the 80-100 motor and have 2, 2000 MaH battery packs wired in parallel, glued and screwed into the airframe!!! Staying with 2, 6S 5000 MaH Lipo's and Turnigy 100 amp SC. Slow as Christmas in assembly, but may have it done later this year. Should go faster since I have one under my belt

I guess you should change the title of of this thread from RIP to "The Phoenix rises".

[LBJ]

Guess so! Won't be much on this thread since it's been done. Just a word to say I'm gonna do it again.

[BrentP]

My friends uncle is weird al. That isnt a lie. I swear.

cool parkpilot. I programmed and oprerated some lighting on a HBO (I think) special Al did in vancouver back in the mid 90s...cracked me up needless to say.

[BrentP]

For anyone flying the jenny on 2- 6s 5000 lipo packs in series....what are your aprox. flight times.

Also can anyone tell me the measurement from the front of the wheels to the aft most tip of the rudder.
And what is the beam (width) of the fuse at the location of the front of the wheels.

Trying to calculate if this beast would fit in my wagon.

Thanks