HobbyKing.com New Products Flash Sale
Reply
Thread Tools
Old Jul 05, 2005, 04:32 PM
Space Coast USA
hoppy's Avatar
Space Coast
Joined Oct 2000
20,818 Posts
DECATHLON House of Balsa SchoolYard scale

This is a very nice kit from House of Balsa. It's the Decathlon, Kit K-21, school yard scale for .061 engines. It was a no brainer conversion to electric with the Hacker A20-20L going on the firewall and the battery going in the fuselage above the LG. With a Tronics 3s1800Lipo, the AUW was 20oz. It flies well at 1/2 throttle and will do all basic aerobatics including knife edges.
The list price is $59 but by shopping around, I found one for $39.

I didn't make any attempt to lighten the plane. The body is solid balsa sheeting as are the tail surfaces and the ailerons.
hoppy is offline Find More Posts by hoppy
Last edited by hoppy; Jul 05, 2005 at 06:34 PM.
Reply With Quote
Sign up now
to remove ads between posts
Old Jul 05, 2005, 09:51 PM
Registered User
Matt D.'s Avatar
Greensboro, NC
Joined Jul 2002
780 Posts
Nice job!
Matt D. is offline Find More Posts by Matt D.
Reply With Quote
Old Jul 07, 2005, 10:46 PM
Space Coast USA
hoppy's Avatar
Space Coast
Joined Oct 2000
20,818 Posts
Thanks Matt, I owe it all to the kit

Should have mentioned that it probably is for an intermediate or better flyer as it can be quite a bit faster than the usual foam floater. The ailerons are large and roll it quite nicely. The Hacker A20-20L provides about 10oz of thrust over the AUW so you know it will get up and boogie.

On the motor mount...the firewall was simply moved to the very front of the nose and the motor screwed to the back of the firewall. Neat and simple.
hoppy is offline Find More Posts by hoppy
Reply With Quote
Old Jul 08, 2005, 10:28 AM
Registered User
BuzzBomber's Avatar
Newton, NJ
Joined May 2003
1,884 Posts
Hoppy, that looks REALLY nice! Love the covering! I've got the Laser stick from the chea-pass series myself; just started putting it together last weekend, and have one wing panel done and the other dry fit with about 1 hour time on the project so far. These kits are amazingly simple to build, eh? Mine is going to be motivated by an ancient Enya .15 (or an OS .10, haven't made up my mind), but I must admit, I did think of E-conversion. Be sure to some back with a flight report!
BuzzBomber is offline Find More Posts by BuzzBomber
Reply With Quote
Old Jul 08, 2005, 10:36 AM
closed
fly4fun's Avatar
Gilbert AZ
Joined Jun 2001
9,323 Posts
Wow the AUW is 20OZ!!!!! Very Light for a 47" wing span. I'm building a HOB Acro Cub now and have a HOB Space Walker on order. Im liking these HOB Kits
fly4fun is offline Find More Posts by fly4fun
Last edited by fly4fun; Jul 08, 2005 at 02:14 PM.
Reply With Quote
Old Jul 08, 2005, 02:03 PM
Space Coast USA
hoppy's Avatar
Space Coast
Joined Oct 2000
20,818 Posts
And it comes with all the hardware! Those modelers that have been only on the electric side probably won't recognize the hardware...it's heavy duty.

By cutting holes in the body and tail surfaces, using light weight hardware, and reducing the amount of plywood doublers, several or more ounces could probably be shaved off. I put the Rx and servos as far forward as possible as I thought the cg might be hard to adjust otherwise. As it turns out, things would have worked out better if I had mounted them as far back as possible. The way it is now, i had to mount the battery over the LG....otherwise it probably would have fit in nicely entirely in front of the gear. No problem, it all worked out OK.
hoppy is offline Find More Posts by hoppy
Reply With Quote
Old Jul 08, 2005, 02:15 PM
closed
fly4fun's Avatar
Gilbert AZ
Joined Jun 2001
9,323 Posts
Sounds good Hoppy.
fly4fun is offline Find More Posts by fly4fun
Reply With Quote
Old Dec 07, 2012, 04:00 PM
Registered User
Joined Dec 2012
53 Posts
Mine weighs 31 oz now.
Dave180 is offline Find More Posts by Dave180
Last edited by Dave180; Jan 27, 2014 at 08:20 PM.
Reply With Quote
Old Dec 07, 2012, 04:19 PM
I just want to go fly!
walter3rd's Avatar
United States, MD, Towson
Joined Aug 2012
2,279 Posts
nice belly skid!
walter3rd is offline Find More Posts by walter3rd
Reply With Quote
Old Dec 09, 2012, 04:47 PM
Registered User
Joined Dec 2012
53 Posts
Thanks.
Dave180 is offline Find More Posts by Dave180
Reply With Quote
Old Dec 11, 2012, 12:39 AM
Registered User
Joined Dec 2012
53 Posts
Video of landing skid:

http://imageshack.us/clip/my-videos/...ndrosuafo.mp4/
Dave180 is offline Find More Posts by Dave180
Last edited by Dave180; Dec 11, 2012 at 12:51 AM.
Reply With Quote
Old Jan 23, 2014, 03:57 PM
Registered User
Joined Dec 2012
53 Posts
I'm still flying mine. Its down to 31oz now after a calibration error on my scale.

Super Decathon rc motor test (6 min 42 sec)
Dave180 is offline Find More Posts by Dave180
Last edited by Dave180; Feb 10, 2014 at 10:27 AM.
Reply With Quote
Old Jan 23, 2014, 08:24 PM
Registered User
Canada
Joined Nov 2000
6,946 Posts
Hard ton see much of anything.. Ccaisionaly a red speck and mostly scenery.
33 ! ounces.. How was that managed?? that's a 10/11 oz airframe with wheels.
Typically HOB kits are a bit overdesigned /heavy but 33 oz is a bit Much.
22 ounces for avionics? Are you using a Speed 600 and 8 2400 nicads?
Note that It's designed for Norvel 061 which is "perhaps' a 90/100 watt motor.
Usually a 5 to 7 ounce electric power avionics package.. and that's using medium size bits
Bare is offline Find More Posts by Bare
Reply With Quote
Old Jan 23, 2014, 10:50 PM
Registered User
Joined Dec 2012
53 Posts
Did you watch the ending? You can see the plane there. Ha Ha. The cg on that plane is kind of forward. I had to add like 2.5 oz of lead up front when I changed to the brushless motor plus I run a receiver battery which is 1.6 oz; so thats 4.1 oz extra. No big deal. Its got plenty of wing. It can fly really slow if you trim it right.
Dave180 is offline Find More Posts by Dave180
Reply With Quote
Old Jan 24, 2014, 12:46 AM
Registered User
Joined Dec 2012
53 Posts
I rechecked the weight. It's up to 15oz empty now after some upgrades. I just finished a smaller plane then this and it ended up at 13oz empty.
Dave180 is offline Find More Posts by Dave180
Reply With Quote
Reply


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
House of Balsa scale Bonanza build hawknips Scale Kit/Scratch Built 55 Jan 09, 2011 09:32 AM
Sold House of Balsa Super Decathlon - 10 Kit NIB codell Aircraft - Fuel - Airplanes (FS/W) 1 Jan 30, 2006 12:35 AM
House of Balsa Electric Acro Cub Schoolyard fly4fun Electric Plane Talk 70 Oct 17, 2005 05:11 PM
House of Balsa 1/5 scale EXTRA 300L Bearzilla Aircraft - Fuel - Airplanes (FS/W) 3 Jun 04, 2003 06:55 AM
NIB House of Balsa Super Decathlon kit mickydee Aircraft - Electric - Airplanes (FS/W) 2 Apr 06, 2003 01:00 PM