Jeremy's Cox Stick

WingingIt74 Fri Mar 22, 2013 8:55 am

After getting his Solo-Lite to fly on my Texaco, Jeremy has been trying to design another creation specifically for a Cox engine.

So far it's named the Cox Stick
Jeremy's Cox Stick Cox_st10

nitroairplane Fri Mar 22, 2013 8:57 am

Looks like it's gonna be a quick one, what's the span?

WingingIt74 Fri Mar 22, 2013 9:01 am

Right now it weighs 2.94oz. He doesn't think it will be more than 4oz completed. It has a 30" wingspan.

nitroairplane Fri Mar 22, 2013 9:05 am

With an 049?

He's gonna be in for a mad time flying it, my 010 could fly a 4oz plane with authority!

WingingIt74 Fri Mar 22, 2013 9:06 am

Considering he's building it for me, maybe I'll have my hands full lol!

He is designing it for a Babe Bee, but I bet any engine will mount up.

nitroairplane Fri Mar 22, 2013 9:11 am

Good luck, have some caffeine to keep those reaction times down and made sure to do some eye work.

If I were building this I'd probably stick a tee dee .020 on it, even that would probably be outside my flying ability though haha

Enjoy the plane Smile

You've got me thinking to throw something similar together for the G-mark .03.

What servos are gonna be in it?

WingingIt74 Fri Mar 22, 2013 9:12 am

I could put big servos in it to slow it down lol!

WingingIt74 Fri Mar 22, 2013 9:13 am

Here is the horizontal tail

Jeremy's Cox Stick Cox_st12

duke.johnson Fri Mar 22, 2013 9:48 am

Is he making it out of foam or coroplast? I'm thinking of trying a little R/C.

WingingIt74 Fri Mar 22, 2013 9:50 am

It's foam

duke.johnson Fri Mar 22, 2013 12:34 pm

WingingIt74 wrote:It's foam

Cool, I thought it looked like coroplast on the rudder but foam on the fuse. How's the foam going to work with the fuel? And will he share the plans?

nitroairplane Fri Mar 22, 2013 12:35 pm

The foam will require very vigorous fuel proofing either through covering with a fuel resistant film or a thinned thinned epoxy concoction.

WingingIt74 Fri Mar 22, 2013 12:42 pm

Depends on the type of foam...

nitroairplane Fri Mar 22, 2013 12:44 pm

And the fuel Razz

I mostly used Diesel but most foams aren't nitro resistant either.

Pinchflat Fri Mar 22, 2013 3:16 pm

I am Jeremy the designer and builder of this plane.
I will do some testing on the nitro and foam issue. I did do a fair amount of reading about nitro and foam. Most say that it is ok. If all else fails I will either fiberglass it or use iron on covering.

The 4oz weight that is quoted will be a bare airframe without any electronics.
I think I have plans for it scanned in my old computer. I need to see if I can get them off of it.

nitroairplane Fri Mar 22, 2013 3:19 pm

Welcome Jeremy.

Thanks for clearing that up, 4oz rtf would be a pretty mean beast in the air.

I know that some foam is fine, I know we've all seen foam glow powered trainers.

My cox EZ Bee (II) is made out of foam and doesn't have any problems.

Depron foam does not react well to nitro though so if you're using that you may want to re consider.

All things considers, this plane looks like it's gonna be great fun.

Edit:I assume pinchflat is a bicycle reference, if so I've gone tubular to eliminate you Smile

Pinchflat Fri Mar 22, 2013 3:32 pm

Pinchflat is a bicycle term. I am a service manager at a bicycle shop. I personally run tubeless.

It is Pro-Formance foam, so basically depron. I can coat the front half with epoxy.

duke.johnson Fri Mar 22, 2013 3:43 pm

Welcome Jeremy! Nice looking plane. I hope you can find the plans, my boys and I are talking about getting in R/C and it looks like it would make a good/tough trainer. And easy to repair. I'd like to build one cox and one electric.

WingingIt74 Fri Mar 22, 2013 3:59 pm

Here's his original QuickStick Jeremy built (Electric)

https://www.youtube.com/watch?v=b3aIhppXuH4

pkrankow Fri Mar 22, 2013 4:21 pm

Put something with a throttle on it to tame it down.
Phil

WingingIt74 Fri Mar 22, 2013 4:23 pm

I've got a Babe Bee with a throttle I could put on it.

Pinchflat Sun Mar 24, 2013 6:40 pm

12" of snow here in STL. Work continues on the 'stick.
I tested some of the foam with 25% nitro and it shows no ill effects. Today I picked up an engine form Travis and mounted it to the plane. I had to hack off a good bit of nose to get the CG right, but I had planed on that.
The finished weight should be 11-12oz depending on how I finish it.

Jeremy's Cox Stick Photo_10

pkrankow Sun Mar 24, 2013 8:05 pm

Gonna be fun. That engine puts out roughly 6 oz of thrust on a 5x3 prop.

Phil

Pinchflat Tue Mar 26, 2013 9:11 am

I have decided to cover the plane in tissue using water based polyurethane (WBPU) as resin.
Last night I hade good progress on the fuse and h stab but the wing was problematic. I ended up peeling most of the tissue off before the WBPU had cured and started over.

WingingIt74 Tue Mar 26, 2013 9:16 am

Will WBPU rehydrate with fuel after it dries?

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