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Old Jun 04, 2008, 09:27 PM
115 inches of 'hog
ScaleBrad's Avatar
Joined Aug 2004
2,702 Posts
Build Log
BIG 115" A-10 !! Dean Lassek / Josh Harel A-10 Warthog With Byron EDF's !!!!!!

It's been a little quiet around here lately, so I am pleased to introduce my newest, biggest, scariest project !!!

110" w.s. A-10 Warthog. 1/6th scale. This is a kit sold by Dean Lassek and with plans made by Josh Harel. The kit has been around for a while, mostly seeing action in the late 90's first as a twin glow ducted fan and then as a twin turbine, both built by Dean Lassek. After searching for my next project, being an avid A-10 fan ( actually I'm obsessed ) I came across some info on this kit. After finding Dean on RCU late last year, I placed an order with him for the basic kit, and waited patiently for it to be delivered. The fiberglass parts arrived today, and the foam wing and tail cores, canopy and plans are on the way.

At this point my plans for powering this beast are two Byron Fan units converted to electric power, using Hacker outrunners, either on 10s or 11s (Thanks to Bob Ruff for making the effort to discover the Byron/Hacker conversion)

Robart makes a set of retracts for this kit, which were special ordered about 5 months ago and arrived not too long ago.

Also, I would like to thank the following people for helping make this dream possible:


Dean Lassek ( producer of the kit)

Josh Harel ( designer of the plans)

Bob Ruff ( discoverer of the Byron/Hacker electric conversion)

Tomas at VQwarbirds.com for getting me the Robart Retracts

Stig Anderson ( Denmark) for this excellent build thread (still building!) over at
RCU: http://www.rcuniverse.com/forum/m_3147152/tm.htm

Junkjet ( Freddy ) For making the second run of Byron
adapters and the super neat spinners !

Sean Sweeney for suggesting the use of Byron fans

My Wife (for putting up with ANOTHER plane in the house)


Robert at EJF.com (sells the Byron conversion parts, and is a great person to
deal with in general )

If I forgot anyone, please PM me !!
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Last edited by ScaleBrad; Jun 16, 2008 at 09:53 AM.
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Old Jun 04, 2008, 09:34 PM
115 inches of 'hog
ScaleBrad's Avatar
Joined Aug 2004
2,702 Posts
...And now for some pictures
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Last edited by ScaleBrad; Sep 07, 2010 at 05:50 PM.
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Old Jun 04, 2008, 09:41 PM
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MagnusEl's Avatar
Sweden, Gävleborg County
Joined Jan 2004
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That thing is BIG!!
I`ll follow this tread, subscribed.
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Old Jun 04, 2008, 09:47 PM
Watts is life...
rcjetpilot's Avatar
Bot's like to know where you live
Joined Sep 2003
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What ya got stuffed in that duct, looks like packing fur

Wow! good luck on this project!

Bob
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Old Jun 04, 2008, 09:52 PM
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lavochkin's Avatar
Mokena,Illinois -United States
Joined Oct 2006
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That thing is as big as a Mibo turbine A-10. Awesome!!!!!
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Old Jun 04, 2008, 09:53 PM
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lavochkin's Avatar
Mokena,Illinois -United States
Joined Oct 2006
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I'd look into this fan maybe.
http://www.rcgroups.com/forums/showthread.php?t=872711
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Old Jun 04, 2008, 09:55 PM
115 inches of 'hog
ScaleBrad's Avatar
Joined Aug 2004
2,702 Posts
The glow version was reported to weigh about 50+ pounds. This included 9-10 lbs of lead in the nose to balance. With the electric setup we can put the "fuel" (lipo's) in the nose to eliminate this dead weight. I am making every attempt to keep this one as light as possible. The fiberglass parts were made using a lighter layup for electric power. Everything will be weighed before assembly to see where I can save weight.. Just a few ideas-

- Light ply instead of regular ply where possible

- Dubro lightweight wheels instead of heavier aluminum "jet" wheels

- No brakes

- K.I.S.S. principle... One large air tank for retracts, and basic tubing only, Single Spektrum 9100 RX with 2 batteries, no powerboxes, etc etc



POWER SYSTEM:

Static testing on the Byron fans, using older TP Pro-lite 10S packs showed approx 10.5 lbs of thrust per unit. This is static with no thrust tube installed.

Expected total thrust approx 22 lbs using newer 30c Lipos and thrust tubes.

The byron fans were chosen because of their larger diameter.. meaning more thrust at low RPM's. The A-10 is not a "fast" plane, and wasn;t designed to break the speed barrier My reasoning is I want to put as many Watts into thrust as I can, with "speed" being 2nd... That is the best bet to make this project a success. Also the low cost of 2 converted Byron Fans is one third or less the price of similar sized systems. I do have a budget of sorts.

Byron fan unit : $80

EJF Adapters $46

HobbyCity
Sentilon 100 HV ESC $96

Hacker Motor $140 (from Miniature Aircraft)

-----

$ 362

x2 = $724





Hoping to achieve an AUW of 35 lbs.
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Last edited by ScaleBrad; Jun 05, 2008 at 03:39 PM.
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Old Jun 04, 2008, 10:03 PM
Registered User
Moore, Oklahoma
Joined Oct 2004
4,322 Posts
Quote:
Originally Posted by ScaleBrad
The glow version was reported to weigh about 50+ pounds. This included 9-10 lbs of lead in the nose to balance. With the electric setup we can put the "fuel" (lipo's) in the nose to eliminate this dead weight. I am making every attempt to keep this one as light as possible. The fiberglass parts were made using a lighter layup for electric power. Everything will be weighed before assembly to see where I can save weight.. Just a few ideas-

- Light ply instead of regular ply where possible

- Dubro lightweight wheels instead of heavier aluminum "jet" wheels

- No brakes

- K.I.S.S. principle... One large air tank for retracts, and basic tubing only, Single Spektrum 9100 RX with 2 batteries, no powerboxes, etc etc

Static testing on the Byron fans, using older TP Pro-lite 10S packs showed approx 10.5 lbs of thrust per unit. This is static with no thrust tube installed.

Expected total thrust approx 22 lbs using newer 30c Lipos and thrust tubes.

Hoping to achieve an AUW of 35 lbs.
Nice birdy!

I bet that cart looks sweet cruising across the street

Chris
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Old Jun 04, 2008, 10:23 PM
go fly! no crashes!
Synwpn's Avatar
Honolulu, HI
Joined Jun 2003
2,845 Posts
holy crap thats big! definitely watching this one!
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Old Jun 04, 2008, 10:23 PM
DELTAS RULE
corsair nut's Avatar
tehachapi, CA
Joined Jan 2006
21,888 Posts
holy gigantic A-10 batman! brad, that thing is rediculus! :O cant wait to see that baby in the air! man...talk about some serious sanding when it comes time for paint! :O
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Old Jun 04, 2008, 10:27 PM
115 inches of 'hog
ScaleBrad's Avatar
Joined Aug 2004
2,702 Posts
Yes, it is ridiculous !! My neighbor came over to see it and we all just started laughing.
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Last edited by ScaleBrad; Jan 15, 2009 at 08:55 PM.
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Old Jun 04, 2008, 10:32 PM
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edf nut's Avatar
USA, SC, Greenville
Joined Sep 2005
912 Posts
All i can say is.................

SWEEEEET

Travis
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Old Jun 04, 2008, 10:34 PM
115 inches of 'hog
ScaleBrad's Avatar
Joined Aug 2004
2,702 Posts
Last pic of the night...

Robart Retracts, with DX-7 shown for size comparison
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Old Jun 04, 2008, 10:36 PM
EDF all the way!
bruff's Avatar
Gilbert, Az
Joined Jun 1999
7,943 Posts
Awesome!!!!!!!!!!!!
Bob
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Old Jun 04, 2008, 10:42 PM
Got H2? Fuel Cell R/C Car
Keith43221's Avatar
United States, TX, Del Rio
Joined Mar 2004
2,476 Posts
Dang... that is freaken massive!
How detailed are you going to make it?
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