Avro Arrow construction.

[Mark DiMonte]

Well I am building my third CF 105 Avro Arrow and I decided to do a construction thread for it. They say a picture is worth a thousand words so I will fill this up with pictures instead of text. The first pis are of Arrow #2 so you can see what you are getting. The whole plane is made out of 5 mil depron with a 5 mill carbon tube to strenghten the wing and fin. (I would use a 4 mill tube if I could find one) Start first by tracing out templates of the parts on the depron. Next cut out the parts with a new sharp # 11 exacto blade. These are not all of the parts as some have to be cut and fit once most of the building is done, but they will get the plane framed up. make a channel in the main wing and the trailing wing sections to accomodate the carbon tube. This can be done quite quickly if you cartefully cut out a 90 degree channel in the edge first and them wrap some 150 grit sandpaper arround a piece of carbon tube. Carefully sand a half circle in each side and roughen up the carbon ube with 150 grit sandpaper. Join them using either foam safe CA or epoxy. Do the same to the fin but simply glue the carbon tube to the fin and not the rudder.

[Mark DiMonte]

Here is the wing and fin all glued up. Leave the tube long on the fin as it will aid in painting later and it will be trimmed to pass through through the wood engine mount.

[Mark DiMonte]

Place the bottom on a flat surface and glue in the formers at the locations on the plans. Carefully glue the sides onto the bottom and the formers. Remember to bend up the front intake to match the side and glue it . Here is a pic of the fuse framed up. I am about to start adding the top sheeting and the nose.

[David Winter]

Cool.. you can never have too many Arrow's. At this rate there should be more Arrows on this board than there were in real life..

[CRASH GORDON]

right on mark,now i can watch it from start to mailing it to me,hahaha.money is in your account.

[Mark DiMonte]

Arrow is getting closer. Rough sanded and primed in some spots.

[David Winter]

Cool... looking forward to seeing plans(kit?) for this one.

[Mark DiMonte]

I now have a link where you can see some video clips and download the plans in DXF ( Autocad) format. Go to www.madrc.com/depronavroarrow/. :)

[Mark DiMonte]

Carved the canopy out of laminated depron. I also began painting and mounted a removeable fin assembly for shipping purposes. The fin's carbon tube passes through the fuse and is cut flush to the top and the bottom surfaces. A joiner is used inside the carbon tube in the fin so that the fin may be epoxied in place after shipping.

[David Winter]

hi Mark.. yeah, the plans download isn't working.

[Neil Walker]

That is a beautiful looking Arrow Mark. Can't wait for the plans to be up.

How does she fly? With that wing area I'd bet she's fairly well behaved. Is this a high performance pusher, or more of a park flyer? Power system, AUW?

I wonder if this thread will be only Canadians? So far it is :)


edit: ps if anybody wants any photos, drawings etc for detailing, I have the hardcover book put out by the Arrow group, contains pretty much all of the known surviving photos and drawings. I'd be happy to scan any of them. COme to think of it it's been years since I looked at it, I think I'll go have a read now!

[Rikidee]

Just finished taping the tiled plans together yesterday. I am impressed with the reinforcing tubes connecting to the motor mount connecting the entire structure together. Having neither depron or carbon fiber I think I may try Fanfold blue foam and wood. I have a CDrom motor I wound that would power it nicely however the gear whine of the GWS unit seems to suit the jet sound. The direct drive unit is almost silent. The mainly straight lines of the Arrow make the foam option easy. Straight as an Arrow. Wish my foam were white. A good Canadian plane probably shouldn't look like Tom Sawyer painted it. :-)
Rick

[Mark DiMonte]

To anybody who I sent the dxf plans to: The plans have changed slightly (some formers) to include the New CG. It is impoortant to the flight of this plane!!! The cg is 10.5 inces forward from the the last former. Also the plan should be downloadable by 3:00 pm today at www.madrc.com/depronavroarrow/. If I have sent you the plans already, you should download the updated ones just to make sure things go smoothly. Thanks. Some more pics of construction to follow.

[Mark DiMonte]

Did some more work on the Arrow. I installed the control horns using zip ties glued into embedded 1/4 inch balsa stiffeners. next is a pic of how the engine mount works. Painted the nose and the intakes and installed the intake deflector as per the plans. Painted the canopy window cut outs.

[Mark DiMonte]

Hinged all surfaces with packaging tape cut down to 1 1/4 inch. Carved , painted and installed engine cooling vent. Printed scaled down decals on clear adhesive mylar and fuelproofed them. ( only clear I had.) This is how she looks right now. More to come.

[David Winter]

wow... looks really nice.

[JimF]

Anybody know of a free downloadable .dxf viewer program that will let me view and print plans ?

Thanks
Jim

[AirX]

AutoDESK Volo View used to be a give away.

Eric B.

[pkrska]

Get a hold of an Corel Draw program. It has some dfx capabilities. Not sure about the new versions.

[David Winter]

Download turbocad (http://www.turbocad.com/) It's fully functional for 30 or 60 days and opens and prints both dxf and dwg files. It also has features to print large drawings over multiple pages.

[CRASH GORDON]

WOW,she looks great.awesome work.

[Mark DiMonte]

Cut out the hatches for the receiver and the battery and glued in depron rails for support. Clear tape seals them up. Simple.

[Mark DiMonte]

Making the box for shipping. Plane not done tet but should be soon.

[Mark DiMonte]

Added the decals and the bristol board tailcones. All packed up and ready to go. Servo locations are marked on the fuse . This one is going to BC.

[Mark DiMonte]

Forgot to show you the servo locations as well as the himax 20/25 5300 that is now in my Arrow. Perfomance is excellent

[CRASH GORDON]

looks sooooo sweet, very nice work mark.i cant wait for it.what size prop is that you are useing?? 9x7.

[Mark DiMonte]

I used velcro to fasten the receiver and the battery. Fish all connections for the speed controller and all servos, connect everything together and balance the plane on the Cg 10 1/2 inches forward of f6 or the last former. Mark the location in the front hatch where the batery ballances the plane and add velcro to the inside of the fuse and the battery. The control throws that I am using right now atre 3/4 of an inch each dirrection for all surfaces. I mixed in about % 50 rudder to aileron and set up %60 percent dual rates. Although the control throws seem high, you want them for landing and when the plane slows down. I am going to check the amp draw with my current brushless set up and will post that info when I get it. I also have made( or am in the process of making a power point presentation of the construction process. The present set up is Himax 20/25 5300, with the himax gearboxat 4.43 to 1 and a 7/6 gws propTheunder power 1300 11.2 volt. Performance is amazing. Ulimited vertical and fast. I have not yet posted video clips with this set up but I can tell you it is fast. :)

[Mark DiMonte]

Got the readings on my battery/motor/prop configuration. I loved the performance so I will be going to a higher C rated battery. This combo draws 10.7 Amps at WOT. My present three cell lipo is only supposed to be good for 8.2 amps so I will be buying a new battery. If you stick with the brushed motors, you will be fine because I was only drawing 6.5 amps with a 300C with d gearing and the plane flew very well. In fact all of the video that I have is with the brushed motors. Add about 30% better performance with the brushless set up. I will try and fly with the brushless and take some video so you can see for yourself. :)

[Mark DiMonte]

I bought a new battery for my Arrow. Kokam high output 3s pack. Will be able to fly at wot for entire pack now without worrying. I will get some moore video as soon as I can fly.

[David Winter]

Well.... at least one of us is making progress on their Arrow.

[Cass]

Wow. Awsome plane Mark!

I gotta build one too! Where did you get your depron from???

[Mark DiMonte]

Thanks for the compliment. I bought the grey depron from Depron USA. I bought the white from Pinnacle Hobby in Markham Ont. They stock it quite regularly. My next project will be a Mig-29 or a corsair.

[Ralph Brekan]

I bet that would make a great EDF conversion. I'm still trying to put together my 3DFoamy f18 or I'd cut one of these....

[Mark DiMonte]

What type of motor and fan unit(s) do you think would work in this plane? AUW is 12 oz. right now and has 24 oz of thrust with a himax 2025 and a gearbox. Could I get close to that with fans? I would be nice not to worry about the prop.

[Ralph Brekan]

Holy smokes. I bet yours does unlimited vertical with that setup!

A fan would be marginal at best! You'd get enough to do simple circuts and basic manuvers from shallow dives. But the cool factor is there. 8)

[Mark DiMonte]

Yes, Unlimited vertical as long as you want but it gets small so fast. Also, punching the throttle and going to vertical with no airspeed induces unwanted roll in the vertical axis. In other words, the Arrow wil torque roll quite well. I have to get some video of this. Too cold to fly right now.

[Cass]

Too cold to fly right now

Pansy :p .

Just Kidding Mark :) I hear U. Im almost done my T38 and will start eh arrow as soon as im done! Then im taking a break from jets for a bit. The arrow will be 4 jets since mid Dec :D . I gotta slow down....

[Ralph Brekan]

Yeah, if I scaled it up for the EDF75 unit I'd have to keep it under 20oz to flyon the edgeof stall. DD is the way to go for speed.

[Mark DiMonte]

I know what you mean about building these things. What is it about depron that makes you think you have the money for another plane, let alone the room for one more. I gotta stop....... With that said,,, I ordered a 3dfoamy f-15 today. I have no will power when it comes to these things. HELP.

[Cass]

I sent a copy of the PDF off to a local print shop but got no response from them. What size does the plans print out to?

thx

Dan

[Thomas Nelson]

Beautiful looking bird Mark. Have you any in-flight video with the new cells?

[Mark DiMonte]

It prints out to 57 in. by 67 in. I guess that is a problem. Let me know how big they can print and I will re-arrange the drawing so it could fit and I will send it off to you. Most people have been tilling the drawing and taping it together. I will work on it and change the file on the website to a one page printable size. This will mean it will be quite long but not as wide.

[Mark DiMonte]

No new flights yet with the new cels. New configuration gives me 28 oz. of thrust with 44 mph according to motocalc. I am hoping to get some flight time in in the next coupple of days. Weather is mental arround here.

[REVKEV6]

mark, I can print in D size, which is 3'X4'

[Cass]

How do i tile it? I would be happy to do it that way. I have done the other park jets in this manner as well.

thx

Dan

[Mark DiMonte]

Dan I was lucky enogh to have someone on this site (dpoles) that graciously tiled the plans for me. E-mail me at markdimonte@hotmail.com and I will send them off to you. :)

[Cass]

Thx Mark for the plans. I printed em out on Friday night and patched em all together.

Saturday morning i had parts! :)

Started building after lunch, here is were im at as of 2:30 or so. Im waiting for the glue to dry on the CF rod in the wing. Im gonna cut out the canopy and extension and start getting em sanded up, as well as the nose cone.

This thing builds fast! Good design, im looking forward to getting it ready for paint. Should be sometime tommorrow :)

Dan

[Hepdog]

Nice....Is that foam PINK????

What are you planning for locomotion?

[Cass]

Yep, its pink :) . It will be the right colour when im done though :) . No depron here and no fff either so i slice my own 1/4 stock off of 2 inch foam insulation.

Im thinking either my himaxx 2015/4100 or maybe just go with the 350 on 3s with an 8x6. Its gonna be light. Plans call for 11.5 oz. I should hit that no problem.

had some trouble with the CF rod and had to add some more Probond. wont be dry till morning :( . more pics tommorrow.

[Cass]

Man, been a heck of a weekend. Power outages, freezing temps... Nothing went right, but managed to get some work done on the Arrow.

This is the first time i have tried to paint pink foam with white. It was a B*gger. I think i will use primer from now on for white. Or better yet i will get my hands on some depron, it will make for a nicer finish.

Ok some pics. Im in the process of attaching the turbine cooler then i have to get some black bristol board for the engine exhausts.

Any chance of getting a copy of your decal sheet Mark?

[Mark DiMonte]

Wow!!! Looks great!!!! I am off work right now( threw my back out ) so I don't think I have the scaled down version of the decals. I think I have a Corel jpg of the .45 gas version that you could scale down. Do You want that one? E-mail me at markdimonte@hotmail.com and I can send it out to you.

[Hepdog]

Nice 5 in the background. 414?

[Cass]

Hepdog; yep thats my CF-5D (Moose retirement paint, see the "T-38 Parkflyer" thread). I took it out yesterday to test a new prop (6x5.5) on 3 cells :D . It looked real cool till it gliched and hit some small bushes. Repairs made, paint today.. but here are some pics of my Arrow.

Ironically, i used a carbon fibre arrow shaft for the wing :) .

Just waiting on some decals and then i will do the detail lines. Needs gear though. Im out of gear, it will have to wait a bit till i get a chance to fly everything i have built so far this winter :) .

[Mark DiMonte]

Hi Dan. Plane looks great. Better than mine. Did you get my e-mail with the decals?

[Mark DiMonte]

[QUOTE=Cass] No depron here and no fff either so i slice my own 1/4 stock off of 2 inch foam insulation.

How do you slice your foam? Hot wire ? :rolleyes:

[Cass]

Hi Mark.

Got the decals just now. Thanks a bunch! what size should i scale them to? or are they already the right size?

Plane looks great. Better than mine.

Not even close Mark, the picture lies :) its got sand marks all over it. Like i said in the post, i will try it again with white depron for a better finish.

How do you slice your foam? Hot wire ?

Yep! I built the patented JMorgan foam slicer do-hicky setup :) Works great, and i can build all these FFF planes for next to nothing. I have used blue and pink. This is my first go with pink, i wont use pink again, i like the blue better, it seems to sand smooth easier. Less likely to scratch for some reason.

I just finished FG'ing the bottom of the plane and have a second coat of Polycrylic drying. The last coat i may mix in some baby powder to fill the weave.

Take care of your back Mark! thx for all the help and the setup details. More pics when i get the decals and tape up the lines.


Dan

[Mark DiMonte]

I just used the THLAR(that looks about right) sizing method. Take a look at some pics and use the size of the rondel in comparison to the size of the wing and things should work out fine. I will be going into work tomorrow and could send you the resized decals then.

[Cass]

Thats no problem. I can size em up that way. I thought you had a system going :)

[Mark DiMonte]

Got my new kokham hd 1250 3 cel lipo and it really puts out the juice. I will be trying an 8 X 6 on 4.43 gear drive drawing 16.9 amps at wot. This combo puts out a whopping 36.3 Oz. of thrust with good speed as well. This battery weighs considerably more than the tp 1320 bringing the plane in at just over 14 Oz. or 400 grams. Seeing as I will have a 2.6 to 1 power to weight ratio, I dont think it will be a problem. I have modified the bottom of the fuse with some air cooling vents for the battery. I just need some warmer weather.

[Hepdog]

I just need some warmer weather.

Relax April is only a little ways away... :rolleyes:

[Cass]

LOL, I went out this evening at -14 in the sunshine. Went onto the lake and gave my T-38 a toss. Way to much aileron trim -> crash :( . all fixed, again. Then i flew the F-18 for about 8 mins till my hands started to freeze. Its getting real fun to fly now with my computer radio! All teh mixes, what a hoot!

Im gonna try my T-38 again tommorrow, if she crashes again, i will build another one and in teh mean time transfer the gear to the Arrow. I can't wait till April :D .

Got the decals on, i resized to 65% of original, worked out nice. Where can i get the tape u used to stripe it?

[Mark DiMonte]

I bought a 36 X 6 inch trim sheet from my local hobby shop and used a long aluminum ruler to cut out the appropriate width pinstripes. In the past, I have had excellent success using automotive pinstripe from Canadian Tire.

[flyingwings]

Attached is the 3 view of the Arrow that I have used. The drawing has been developed from the various drawings that I have available.

Mark

I love your Arrow. I might suggest that you could reduce the weight of the Arrow by eliminating the bulkheads by using the wing as your primary structure. I apply .4 oz carbon fibre tissue to the upper and lower wing in the centre. The forward structure is carried into the under side of the wing. The bottom of the fuselage gives you the bending strength by running a similar carbon fibre to the underside. See the attached photo.

Mind you I catapult launch my models. I don't have to hold on to the fuselage for launching. I don't like taking a chance with my models. The CAT always works.

The intakes are opened up to allow air flow right thru to the exhaust nozzles which are open as well. Lots of cooling and more thrust from the prop.

Use the wing and tail for mounting the motor.

I have found this structure to be exceptionally strong. Let us say my models have gone through much impact testing and stood up to the crash loads.

My finished carbon fibre 32 scale Arrow finished with 4 gm servos, brushless ESC, Lipo, receiver and StrongRCMotor Outrunner will weigh just under 10 oz. I am just waiting for the curved magnets. Sometime next week hopefully.

The next 32 scale Arrow will weigh 8 oz. I am eliminating more foam based on what I see with your Depron models. I still want the wing to have an airfoil shape rather than a flat plate.

I have flown the prototype with a Speed 300 at 16 oz. Heavy but still flew. With the Outrunner I am expecting much greater performance.

The Strong RC motor will weigh 25 gm. including the prop and will produce between 9 to 12 oz. of thrust. The motor uses the curved N50 1 mm magnets. The reduced motor weight allows me to reduce the battery weight as well since the battery sits aft of the intakes.


Paul

[Mark DiMonte]

Wow !! Looks great. The weight savings using you method are excellent. My Arrow could be lighter I guess but I have no problem with wing loading right now. With the current motor/battery set up, I have more than a 2 to 1 power to weight ratio and the plane could litterally be tossed staight up into the air and begin to fly. When I was designing this arrow I wanted to make something that could be easy to build and would involve the least ammount of sanding and filling. I did take some artistic licence in the fuse shape to make a simple and strong airframe. With that in mind, my arrow has incurred some damage on the underside of the fuse on landing ( freshly aerated field) and I am looking for something to cover the bottom of the fuse with that does not add too much weight. Where did you get the carbon tissue and what do you use to adhere it?

[Mark DiMonte]

PS. The drawings you sent me are awesome. What cad program did you use to draw them in ?

[Mark DiMonte]

I have noticed that I was not clear on the plan as to where the wing is placed . Here is a pic as to it's location. Basically, the inner trailing edge of the elevon lines up with the last former. Sorry for the confusion.

[RCParkflyer]

Hi Mark,

I just downloaded the plans, signing onto the thread. Not quite sure when I'll get to work on her, I have 2 ahead to do, a 3DFoamy F-15 Kit, that I'm still waiting to be delivered, and my project for the Jet design contest. She sure is a pretty bird!!

Tom - Milwaukee

[Mark DiMonte]

I am wiating for a 3d foamy F-15 as well. This depron plane thing is taking up too much of my time. I love it though. OOPS.. When I was transferring the drawing, I added an extra servo to the top plan above.

[Cass]

When I was designing this arrow I wanted to make something that could be easy to build and would involve the least ammount of sanding and filling.

Congrats Mark, you have exceded your expectations in my humble opinion.

Dan

[Cass]

OH yeah, i got the engine exhaust cones on. Still got to get into town to get some striping tape. Damn its cold here. I havent flown in quite awhile :( .

[RCParkflyer]

Last I heard about 3D foamy they were waiting for a shipment of CF rods to supply parts kit. This may be the hold up.

[Cass]

Tom, im sure your gonna be happy with F15 too. I built a 60% version, its my favorite plane right now. I cant believe how stable it is. Im Expecting the same from the Arrow as well. Im starting to accumulate ready to maiden aircraft :D .

Hope you get your kit soon

[Mark DiMonte]

Some good flying weather is on the way for the Toronto area so I will definately get out and take some video of the Arrow with the himax 2025 brushless set up. Batteries are charged on my video camera as well as my plane. Still waiting for my F-15.

[Mark DiMonte]

Flew today with my wife and my son on the video camera. Performed some high alfa flying and slowed her right down. I was very happy with the performance on a 4.4 gearing with an 8 X 4.3 slowfly GWS and a Kokham 1250 HD 3 cell Lipo. Batery and motor did not even warm up. I will try loading up with more prop tomorrow. Will post Video on Mon. It was nice to fly again.

[PhilLin]

Flew today with my wife and my son on the video camera. Performed some high alfa flying and slowed her right down. I was very happy with the performance on a 4.4 gearing with an 8 X 4.3 slowfly GWS and a Kokham 1250 HD 3 cell Lipo. Batery and motor did not even warm up. I will try loading up with more prop tomorrow. Will post Video on Mon. It was nice to fly again.

Congratulations! Hope to see some still pixies too.

Phil

[pkrska]

Flew today with my wife and my son on the video camera. ...I will try loading up with more prop tomorrow. Will post Video on Mon. It was nice to fly again.

I fly at the Downsview Park. So far the weather has been too cold to fly in so I am waiting for a nicer day weather wise. I fly a F27 Stryker and use video onboard. Have you ever considered using a camera or video? See my avitar to see the Downsview Park area that I flew in while taking that video.

[Mark DiMonte]

Flew again today and changed the prop to a 9 X 7 cut down to 8 in. Wow!!!!!!!! Plane flew at least 30% faster and had at least 50% more thrust. Flying at 1/4 throttle and puching throttle looked like a catapult launch. Too much fun. 4.4 gearing with this prop seems to be the one. A little more torque roll than the 8 X 4.3 but I'll take it for the performance. I have just begun to discover the slow flight characteristics of the plane . Hi alpha nose hanging is fun. I have not yet crashed this arrow but I was tempting fate today with low flying rolls and vertical punches at stall speed. Too Much fun.

[Mark DiMonte]

I have not considered video yet as I am new to the foamie jobs and thier wing loading capabilities. What does you plane weigh fully loaded?

[Mark DiMonte]

I have a new video post in the gallery of the arrow with the brushless set up. This set up is good but I got better performance with an 8X7 prop. I will try and get some video of this set up today.

[Mark DiMonte]

PKRSKA In reply to your question as to where I fly. I fly mostly at a park near my house in Richmond Hill. My gas flying is done At a water reservoir north of Toronto or at the cottage. Where do you fly? Perhaps we could get together.

[Mark DiMonte]

I will be getting some more video today with the best perfomance set up. 9X7 cut down to 8 in. Kokham 1250 HD 5.5 gearing. The plane accelerates extremely well and has even better verticle acceleration. I will try to get the vids in today to the gallery.

[CRASH GORDON]

VERY COOL mark,mine is still hanging in the hobby shop,great reviews,i have pieces cut out to make my own but no time to build,,,still working on some repairs.

[David Winter]

I fly at the Downsview Park. So far the weather has been too cold to fly in so I am waiting for a nicer day weather wise. I fly a F27 Stryker and use video onboard. Have you ever considered using a camera or video? See my avitar to see the Downsview Park area that I flew in while taking that video.

Neat.. I used to work at Downview when it was still a military base. When I was in the Navy I was posted to CFSD for two years.

[Hepdog]

Hurry up with the BL vid already..... I need a fix....not much outdoor flying round here lately ;)

[Mark DiMonte]

On my way to the field now.

[Mark DiMonte]

Posted a video clip of a vertical launch. Not the best quality but I will get more soon. Plane accelerates out of my hand.

[Hepdog]

Where is it posted?

[flyingwings]

Posted a video clip of a vertical launch. Not the best quality but I will get more soon. Plane accelerates out of my hand.

Mark

Your vertical looks great. How is the level flight speed?

Paul

[Mark DiMonte]

It is posted in the rcgroups gallery http://www.rcgroups.com/gallery/showgallery.php?cat=509. If this does'nt work, just go to gallery on this website, electic, jets.

[Mark DiMonte]

Paul, The level flight speed I think is excellent. The flight envelope is quite broad. I ZOOMs by pretty quick and slows down nice for high alpha nose in the air type stuff. I have added a high speed pass to the gallery. Check it out. http://www.rcgroups.com/gallery/showgallery.php?cat=509

[Hepdog]

Nicely done Mark. Now you just need a faster camera person :p

[flyingwings]

[QUOTE=Mark DiMonte]Paul, The level flight speed I think is excellent. The flight envelope is quite broad. I ZOOMs by pretty quick and slows down nice for high alpha nose in the air type stuff.

Mark

Excellent level flight speed.

I just received my outrunner motor this morning. It weighs 15.5 gm with the mount and the prop saver hub. They have tested this motor with a 7 x 3.5 prop. and indicate 14 oz of thrust at 14,500 rpm using a 3 cell lipo.

That will give me a 1.48 power to AUW.

That should give my 18.5 inch Arrow great level flight and vertical speed.

This motor will also work with my 48 scale Arrow.

By the way this motor is just excellent.

If this works out I have many other 32 and 48 scale projects to do.

Paul

[flyingwings]

[QUOTE=flyingwings][QUOTE=Mark DiMonte]

Mark

I meant to ask you if you solved the lack of rudder problem or did the increased speed improve the roll?

Paul

[Mark DiMonte]

A more forward CG improved the rudder situation but I still like the rudder. I allows you to do the slow flying much flatter.

[Mark DiMonte]

Hi all. I just changed the video clips on my website. They show off some of the flight envelope of the plane with the brushless set up. Go to www.madrc.com/depronavroarrow/ to see them.

[byrocat]

Mark, trying to get my version back on stream for the design contest end-date.

Decided not to go with any changes from what hardware that I currently have (KISS principle rules for the last minute undertaking.)

Since lipo's are not in the cards right now, what would you recommend as a nimh or ni-cd battery pack (cell type and count), using what A&J carries?

Also, could you send me the jpg file with the .45 pusher markings? I can do the scaling and print them out at home.

Sending you a PM with my home e-mail address.

Thanks in advance!

Bruce

Yes, this will be one ugly beast when I'm done.

[Mark DiMonte]

Sent you a PM bruce with the decal files.

[flyingwings]

A more forward CG improved the rudder situation but I still like the rudder. I allows you to do the slow flying much flatter.

Mark

Have you tried setting the motor thrust line 2 degrees to the left. With a tractor arrangement the thrust used to be set 2 to 3 degrees right. The change in the thrust angle may counter the torque of the motor.

The change in the thrust angle may also counter the rudder torque effect caused by the airflow being stronger on the port side of the rudder.

Paul

[Mark DiMonte]

I did adjust the motor angle and found that it was super sensitive. I test flew with varying degrees of thrust and either had a good left or good right turning model depending on the ofset of the motor. I am sure there is a happu medium but I found that the presence of rudder was very usefull. Thanks for the advice.

[flyingwings]

[QUOTE=Mark DiMonte]I did adjust the motor angle and found that it was super sensitive.

Thanks for the test Mark. Now all we need is a fine adjustment. Perhaps jack screws. I will try shortly.

I agree with keeping the rudder. However, can you achieve an axial roll with the rudder plus aileron input? Or does it vary?



Paul