PDA

View Full Version : Sopwith Pup


yorcram
09-08-2006, 02:43 PM
I started building a 36in Pup from Peter Rake plans I have from a magazine from Dec 1999. It was designed for speed 400 and 3 functions. I am adding a removable wing (storage) and ailerons (preference). Has anyone built this plane?
This is my first Biplane and first ww1 so any info on building would be helpful. The plans don't indicate the angle of attack for the wings, looks about 2 degrees on the plans. Are both wings the same AoA?

I am tring to keep the weight at 500g or lower. I am planning on using a 12 Amp motor with 3s 1500 Lipos.

Cheers

Marc

http://i109.photobucket.com/albums/n61/yorcram/th_puptail.jpg (http://i109.photobucket.com/albums/n61/yorcram/puptail.jpg)

http://i109.photobucket.com/albums/n61/yorcram/th_pupfuse.jpg (http://i109.photobucket.com/albums/n61/yorcram/pupfuse.jpg)

WWI Ace
09-08-2006, 06:00 PM
You could go to www.manzanolaser.com (http://www.manzanolaser.com) and ask Charlie. His company sells alot of Peter Rake shortkits. Sometimes Peter even shows up here from time to time to check on us!!! Steve.

yorcram
09-09-2006, 05:29 AM
Fusalage is completed, ailerons are hinged, tail is complete, and nose cone is rough sanded. Pretty much time for covering and trimming. However, I need to wait for h/s to get coverlight in so I can put on the coverlite. and I still need to decide on a motor for it.

Cheers,

http://i109.photobucket.com/albums/n61/yorcram/th_puproughsand.jpg (http://i109.photobucket.com/albums/n61/yorcram/puproughsand.jpg)

WWI Ace
09-10-2006, 07:15 PM
Looking good!!!! Steve.

yorcram
09-15-2006, 05:53 AM
Pup is covered. Still needs nose cone sanded and painted. Also, still need to hook up all the control surfaces. It appears that it will end up at 500grams ( think that is about 16oz). Looks like 13 Amp motor will be ok for this.

http://i109.photobucket.com/albums/n61/yorcram/th_IM000096.jpg (http://i109.photobucket.com/albums/n61/yorcram/IM000096.jpg)

Cheers,

yorcram
09-17-2006, 04:36 PM
Well, it is built and waiting for a power plant. I had a hard time with the ailerons pull/pull setup. Too much slop with running lines through the wings, had to use wire.
I still have the biplane bug so now I need to figure out what my next Bipe will be :D .

Cheers,
Marc

http://i109.photobucket.com/albums/n61/yorcram/th_IM000100.jpg (http://i109.photobucket.com/albums/n61/yorcram/IM000100.jpg)

http://i109.photobucket.com/albums/n61/yorcram/th_IM000099.jpg (http://i109.photobucket.com/albums/n61/yorcram/IM000099.jpg)

http://i109.photobucket.com/albums/n61/yorcram/th_IM000098.jpg (http://i109.photobucket.com/albums/n61/yorcram/IM000098.jpg)

Grasshopper
09-17-2006, 05:17 PM
That looks great Marc! Would love to see pictures of the maiden if possible.

Tom

max-nix
09-17-2006, 05:46 PM
I,some years ago,saw a list of the 10 best flying airplanes ever made and the Sopworth pup was high on the list. (Perhaps because of it's extreme
lightness?)

The forward wing incidence should be a few degrees more than the rearward wing so it stalls first and aids recovery from the stall.

Best of luck!

griffin
09-22-2006, 02:51 PM
Looks great! Good job keeping the weight that low. What color/brand of covering did you use? -Steve

yorcram
09-25-2006, 05:54 AM
I used coverlite in dark green and cream to cover the plane, the nose is painted silver and red.

Cheers,
Marc

Ron
09-28-2006, 03:41 PM
Nice looking model Marc.....hope you get it in the air soon

yorcram
10-04-2006, 11:28 PM
The pup maidened last Friday. I got tired of waiting for the motor / esc to come in so I pulled out the gear from my Alfa 190. It's a floater! I needed down trim on the elevator to get level flight. The ailerons are not very affective, but with the rudder it does turn good. It rolls too slow for any kind if axial roll, more like a sloppy barrel roll (but that most likely is my lack of flying skill :o ). Sure looks good on the slow flyby tho :D.
With all that wing it is affected by any kind of wind. Some points I was able to hover it for a few seconds before it started to stall. I have since put 5 flights on her, but i still can't find the Red Baron...lucky for him :rolleyes:

Cheers,
Marc

griffin
10-05-2006, 12:02 AM
Congrats! A smooth maiden with a scratch build is sure a good feeling! . Hope you have more good flights. -Steve

Ron
10-06-2006, 12:46 AM
congratulations on the successful maiden flight....don't be too concerned about the " hovering" the real sized one didn't stand a chance, and I suspect a roll was sloppy at best. :-)

WWI Ace
10-07-2006, 04:53 PM
You built a really nice plane. Now take it out and fly it as much as you can so you can be proud to tell people that it didn't come out of a box!!! Steve.

skyhog
12-23-2006, 12:45 AM
Hi Marc, I had the same problem with my pup with the ailerons not being very efective and I fixed it with aileron diferential..10% down and 30% up worked for mine...

Cheers Tony
20636

walterk
01-28-2007, 10:23 PM
I have a copy of that magazine, minus the plans. It looks like a good plane. You wouldn't be able to send me a copy of the plans would you.


Walt