This is almost like a Yak.It is a British airplane.

Attached files TR 260.cnc (26.5 KB)Â TR 260.skp (2.2 MB)Â

 

Think I put it in the right place.

 

Put the new Mods on the plane.

Attached files TR 260 -2.skp (2.3 MB)Â TR 260.cnc (37.7 KB)Â

 

No problem my friend. :byei:

 

Set Up.Grayson Hobby-(speed 400 class) Welgard GH2208-17
Brushless motor-- $18.95.
Lipo Battery - 2/3 cells
ESC-18 amp. or higher
Prop size - .3s (11.1v) 9x5 --- .2s (7.4)10.4.7
((((( Model Weight -- 7 oz to 18 oz))))
For slower speed ,use a 370 class motor.

 

I hate to be the one who does the correcting (actually I love it but it is politically correct to say I hate it ) and it is suppose to be constructive criticism, but did anyone try to assemble it in SU? Start by making the two wing parts strait, that is the center line parallel to the green axis. If you than join them, using the motor mount notch as a joint, you'll see that the spar is left high right low, that the tabs don't exactly match into their respective notches.

EDIT: Look at the attached file. It is fixed a bit. I'm not sure if there is supposed to be an incident in the motor mount to the right, there is one in the original and I left it.

EDIT 2: I can't believe I did it (again) I erased the corrected skp file and uploaded the old one. Can someone please put me out of my miseries? I'll redo the file and try to load up the correct one (If I'll be capable of doing it :girl_cray2: ).

 

This should be the correct file. I also changed the spar setup. I made it with a 50% depth center line rather than cutting it all the way through.

Attached files TR 260 -2.skp (2.2 MB)Â

 

Did not do as well as I thought I did on it.No problem.
I can fix that.

 

Gary, +1 to what Mark said.

 

I worked this plan to be cut on a dollartree store foam since this is the only foam I have easy access to. The cutting bit is 1/16"

Attached files TR 260.skp (2.2 MB)Â

 

The problem, for me, with the model plane foam is the price. It's twice the cost of FFF or the dollartree foam. :girl_cray2: :girl_cray2:

 

Thank you for fixing the problems with the file Yoram.I can go back and see the problems with mine now .I learn something new everyday.

 

I finally got around to build this plane. I did it with the DollarTree foam. After maiding (is that a word?) it I found out two things. The CG was a bit farther back than I thought. It's on the carbon spar, more or less. But the biggest problem was that the whole wing flutters. The spar is the flatter axis. I'll have to re-build it but this time I'll double the wings. That should give it enough stiffness.

AUW was 154gr or 5.4oz.
The motor I used is this http://www.hobbyking.com/hobbyking/stor ... oduct=8478 with a 7x6 prop which was enough power. I didn't try vertical yet but it's close to doing it.
Battery was 2s 40c 460ma.
The servos are 3.7gr.

I'll see how it will fly with the wing doubled and will report here. Attached files

 

I'm on my third incarnation of this model. I tried to double the wing and it alleviated the problem. It was just to much work, I thought, so when I had a close encounter of the tree kind I decided to make the single wing version but this time not to remove the paper from the wing part. No more flatter, what's so ever. It flies fast and slow alike. A little bit of wind doesn't hurt it. To much wind and it just gets tossed all over. I left the paper only on the wing, though. I still removed the paper of every thing else, including the ailerons.

I need to get some better servos. I used the cheap 3.7gr servos. I still want to use some under 5gr servos but I don't feel like paying $10 each when the rest of the plane, including receiver and battery are $10. I may end up going with the HXT500 for the elevator. That's where I found it to be the most critical with the 3.7gr servos. They just don't react properly. They have enough torque, though, for this plane.

Over all I rate this plane fun to fly and very responsive. It's not a 3d plane but with the motor I use I can almost hang on the prop. Maybe if I use a smaller prop, I'm using a 7x6, it could hang on the prop.