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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: https://www.rcgroups.com/forums/showthread.php?t=996012

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.

~~~~~~~~~~~~~~~~
CREDITS
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: http://www.parkjets.com/su-37.html (please send him a paypal if you use his plans)
jetset44: https://www.rcgroups.com/forums/member.php?u=10050
Sukhoi Su-37 Super Flanker Park Jet (3 min 50 sec)


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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)


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

-Micah

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STATS (RTF, ESTIMATED):
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.

BUILD TIMER
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.

BUILD TIMER
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...

Subscribed..

Bo
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...

Steve
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.

BUILD TIMER
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
Quote:
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...."



Jeff
www.CommonSenseRC.com


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