ptarp

Hello all, its been a while since I posted anything over here in the plane section. I've been engrossed in R/C electric/nitro buggies and moster trucks [X(] But, after a recent fly-in at my club, I'm back in full swing, and I'm looking for a good unique kit to build that looks cool and flies good too.

I have been wanting a biplane for a while now, and the GP Ultimate looks pretty tempting. Has anyone built it? I consider myself nothing more than an average builder, and since I think that is on of GPs "older" kits, I was wondering if it took more skill to build it. I have built a Sig Something Extra, and a OMP Edge Fun-fly plane.

Also, any thoughts on overall kit quality or flying performance will be welcome. I'd like to slap the .91 4s I have laying around in it.

ksechler

I'm building one now. It's an easy enough build. The wood and construction method for the fuselage is a little much and will produce a heavy airplane. I suggest cutting some holes -I did. I'm at the covering stage so I can't speak personnally for the flight characteristics although I have heard many favorable things.

The project is definetly worth doing, but for a .91 the Skybolt might be a better choice. The ultimate is kind of small for that much engine.

tgott

I built one about 5 years ago and still fly it. I love it. Great flyer and very responsive. It's not much harder than any kit except that you have to build up 2 wings of course. The tough part was lining up the cabane and wing braces. Just be prepared for lots of trail fits. I used an OS 46 fx. a .91 would be way to much but now that I have other airplanes with 4 strokers, I regret not putting one in my Ultimate. I chose not to cover the wing braces. To much work. Just painted them. Otherwise I built it exactly as directed. Used red checkerboard under the wings. Looks great and easy to see in the air.

I will try to attach a photo. Here goes.
Tom

ptarp

Thanks for the info guys. I don't mind over powering my airplanes, I don't intend on flying it in a scale manner I already have the .91 4s, so unless it will mess up the cg so much that it won't balance right, I'd have to put that .91 in. I had that .91 4s in a .40 sized Kyosho cap that only weighed 5. 3lbs, and the ultimate will weigh around the same or up to a pound more, so I don't think it will be that bad. I will most likely have to butcher the cowl to get it to fit though. Are there any other biplane kits that would be a better match for the .91?

waagbuck

My Feedback: (1)

Perhaps a goldberg ultimate? Many would recommend a 1.20 for the goldberg, but it's designed for a smaller engine and would certainly fly fine on a .91.

ptarp

That goldberg ultimate does look tempting, but I'm not the kind of person that likes to put an enginge in the lower recommended range. I'll do some research on RCU and see what I come up with.

jucava

May I suggest the SIG Hog Bipe, that 91 fs will fit it, easy and fast built , very acrobatic, ahh the love is in the air.

ptarp

Hmm, the hog bipe might just be the one. So, you have personal experience with it? I did love the Sig SE manual and wood quality. Is the Hog Bipe an old kit? Is it laser cut w/interlocking parts? I'll do some research on it.

jucava

My friend is pure and true love. Just to delight your eyes www.fubarhill.com and scroll down to Hog Bipes.

dilled

My Feedback: (2)

My son is building one and he has a Satio 100 for his. He has also made all the control surfaces larger.
Dilled

jucava

I have a problem with bipes.

SIG Hog Bipe and OS 91FS with a 14x6

jucava

Balsa USA Phaeton II power by a OS 61FX with a 12x6

jucava

And last but not least my GP Super Skybolt will be power by a Saito FA-100 with a 15x6.

admw12

My Feedback: (4)

HI,
I am just finishing a GP ultimate bipe and I put a os 91 fs on it. I haven't flown it yet, I am still adding the control hornes and fuel tank, then I'll be done. I had a Global Ultimate and I loved it. But it wouldn't do any 3D stuff with the .46. I tried to put the 91 on it, but the 91 was too heavy and the thing flew on the prop instead of the wings.
To remedy this, I decided to build this GP kit and add a few inches to each wing tip to make up for the extra weight of the engine. Well a few inches turned into 6. so I added aabout 2 feet of total wing! I also moved the servos and battery to the back of the fuse, and I am using 2 elevator servos and a pull-pull rudder. This thing should fly great. I'll post some pics tomorrow.
Has anyone ever heard of someone else doing this? Some input would be helpful as I have never done anything like this before.
Thanks.