GIANT 8.5-Foot Long Su-37 (242% Steve Shumate design) - RC Groups
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Feb 07, 2009, 12:31 AM
Flying Wing Freak
MTEXX's Avatar
Build Log

GIANT 8.5-Foot Long Su-37 (242% Steve Shumate design)

Hi All-

My buddy and I were admiring my Steve Shumate Su-37 as it nears completion. He's been wanting to do a REALLY big plane. So we had an idea... scale the Su-37 up drastically.

My 100% build log is here:

The 100% plans are designed around 6mm depron foam. We measured the pink home insulation foam as 14.5 mm. Do the math- that's 242%. I sent the templates to a local document printing company who printed the 12 foot x 7 foot plans (3 pieces of paper). I picked them up 2 hours later for 16 bucks. Test fits confirm that the scale is exactly right. Nice and tight tabs and slots.

And so the story begins.

I hope you all enjoy. Please don't throw your jaw out of socket when you see some of these pics View at your own risk.

This is arguably the MOST ADVANCED and MOST SCALE sculpted-foam parkjet on the market.
The design is by Steve Shumate, who is known as jetset44 here.
Free plans available at: (please send him a paypal if you use his plans)
Sukhoi Su-37 Super Flanker Park Jet (3 min 50 sec)

The inspiration is from RCPowers' Su-37 project featuring working canards and high-alpha mode. I also plan to install 3 gyros. Hence, all delta mixing is done on board.
RC Su-37 Aerobatic STUNTS (7 min 28 sec)

Thanks to Steve Reed. We're building this together in his shop 5 nights a week. Thanks for the interest and support


Under construction
Scale vs manned aircraft: 12.5%
Scale vs original plans: 242%
Span: 72.6" = 6'
Length: 100" = 8.3'
Wing Area: 1698 in2 = 11.8 ft2
Mass: 12.86 lbs
Wing Loading: = 17.44oz/ft2
Thrust: 18 lbs
Thrust to Weight: 1.25 : 1
Power Out: 1310 W
Power Loading: 101.8 W/lb
Flight Time: 7.5 min minimum
Last edited by MTEXX; Feb 26, 2009 at 01:19 AM. Reason: I edit all the time...
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Feb 07, 2009, 12:38 AM
Flying Wing Freak
MTEXX's Avatar
First, I taped the paper together like you would with any tiled plan. Fortunately, I only had to deal with 3 sheets of 36" paper.

The plans scaled at 242% are 12.1' x 7.25'.

My nearly complete 100% Su-37 is centered for, mmm, scale!
Last edited by MTEXX; Feb 07, 2009 at 02:43 AM.
Feb 07, 2009, 12:43 AM
Flying Wing Freak
MTEXX's Avatar
I rough cut the templates out on the driveway, just enough to make them manageable.

Tonight, I cut out the stabilator, canards, v-stab and lamination and the wings.
Due to the size, I will engineer removable wings and likewise cut the fuse/wing template.

3 hours
Last edited by MTEXX; Feb 08, 2009 at 04:36 AM.
Feb 07, 2009, 12:50 AM
Flying Wing Freak
MTEXX's Avatar
Tonight I also cut out the canards, stabilators, v-stabs and v-stab lams.

I edge-reinforced the stabs with 1/2" square balsa stock. They each took a 36" piece perfect. Unfortunately, that's all I had! I believe this is a prelude to the scale I'm embarking on... I used 5-minute epoxy on the leading edge which later delaminated. Then decided to go with hot glue. It really speeds things up.

I also routed the v-stab reinforcement using a dremel and laminated the v-stab assemblies with 5 minute epoxy.

8 hours
Last edited by MTEXX; Feb 08, 2009 at 04:38 AM. Reason: Always editing...
Feb 07, 2009, 01:02 AM
Victoria Super Mortem
UBILDIT's Avatar

This is...

This is going to be good... I can just tell. Good luck...


Feb 07, 2009, 02:02 AM
Park Jet Guru
jetset44's Avatar
HOLY MACKERAL!!! Wow, this is gonna be good. I can't wait to see how it turns out!

Man, the photos on original scale model on top of those huge plans is AMAZING...

Feb 07, 2009, 02:39 AM
Flying Wing Freak
MTEXX's Avatar
Hi again Steve - Quite a popular set of plans you have!


I shaped the stabilators using a 1/3 sheet sander and 60 grit paper. My doctor will be happy to know that my lungs are PINK just like they should be. **cough**. Needs respirator...

I then wiped them down with denatured alcohol.

I applied a thin layer of lightweight spackle to fill in any gouges, nicks dings etc. I'll let this set up overnight.

9 hours
Last edited by MTEXX; Feb 08, 2009 at 04:37 AM.
Feb 07, 2009, 11:58 AM
Registered User
I cannot wait to see this come together. This same idea has been bouncing around in my head, but I just don't have the space.

Have you guys thought about how you're going to launch her? Retracts?
Last edited by wilmracer; Feb 07, 2009 at 12:04 PM.
Feb 07, 2009, 01:51 PM
Flying Wing Freak
MTEXX's Avatar
hiya wilm. most likely hand launch / belly land. I haven't decided on the power system yet, but it will have a comparable thrust-to-weight ratio.
Feb 07, 2009, 04:13 PM
Registered User
hand launching a 7ft long plane

I can't wait to see that!
Feb 07, 2009, 04:42 PM
Flying Wing Freak
MTEXX's Avatar
Originally Posted by wilmracer
hand launching a 7ft long plane

I can't wait to see that!
... 8 and a half feet
Feb 07, 2009, 05:19 PM
Registered User
nego_0's Avatar
ya i want to see video of that!!
Feb 07, 2009, 08:15 PM
Registered User
Waltjg's Avatar
I'm trying to get a visial on the size of the bungee launcher needed here... walt
Feb 07, 2009, 10:33 PM
Registered User
I hope you have He-Man for a launcher

Of course you will have a better thrust to weight ratio than I do with mine... I'll be following this one closely. Actuallt I'm in NC all the time... I would love to see this one fly in person.
Feb 07, 2009, 11:36 PM
Fly it like you stole it..
Tram's Avatar
"We're gonna need a bigger box...."


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