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Old Feb 25, 2015, 06:17 PM
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perplexed genius
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Help!
big slow plane

I saw that I had a whole set of champ electronics and am looking for something big 30 inches that would be light and extremely slow like 5 mph or lower also I would like it to be foam or simple balsa construction. I know this is kind of demanding but am looking for something to build!

Thanks!
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Old Feb 25, 2015, 07:57 PM
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With the Champ power system, I think you are going to have a tough time with an air-frame of the size you are looking for. The power plant in the Champ is great for ~1oz aircraft, but with more size and drag I think that obtaining satisfactory flight will become more challenging.

Take a look at the competition F3P planes; they are basically made of as little foam and carbon as possible, covered in super-thin mylar to keep weight to a minimum. Those models fly on brushless power systems that have huge amounts of power compared to the Champ setup while not being that much heavier.
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Old Feb 25, 2015, 08:41 PM
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in persuit of low wing loading
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My 16 inch foam triplane was built by a friend after I did mine, and used a geared 8mm motor like what is in the Champ. And, he used a standard brick like the Champ has for control. Plans are on about page 40 of this thread. There is also a video of it flying very slowly somewhere in the thread.

http://www.rcgroups.com/forums/showthread.php?t=1232909

Details on how to do skeletonized foam airframes is in this thread.

http://www.rcgroups.com/forums/showthread.php?t=1362423
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Old Feb 25, 2015, 08:45 PM
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How about a 32" span TherMate? I used a FlyZone Playmate fuselage, two ParkZone Micro Citabria wings, a V911 receiver, and a HUGE scratchbuilt foam plate tail. It'll fly slower than my PZ Ember, and it turns on a dime. It's also tossed around by the slightest puff of wind, just like the Ember. The impossibly huge rudder has been cut way down since the video.

TherMate Micro Electric R/C Slowflyer Sailplane (3 min 51 sec)


Rick
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Old Feb 25, 2015, 10:21 PM
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Quote:
Originally Posted by Ricomon View Post
How about a 32" span TherMate? I used a FlyZone Playmate fuselage, two ParkZone Micro Citabria wings, a V911 receiver, and a HUGE scratchbuilt foam plate tail. It'll fly slower than my PZ Ember, and it turns on a dime. It's also tossed around by the slightest puff of wind, just like the Ember. The impossibly huge rudder has been cut way down since the video.

https://www.youtube.com/watch?v=mW14UXxY-ok

Rick
You got the right idea there. Light big wings and small simple design light fuselage. good job.
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Old Feb 25, 2015, 10:24 PM
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Here's a different approach to your thinking . Flying wing?? Not much to it and simple in idea and just might work.Scale it to your size with the equipment you have. Look at it and see if this is doable for you. You're into a build fritz and need some challenge. Be creative and come up with a design you like from these suggestions.
http://www.rcgroups.com/forums/showthread.php?t=1819579
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Old Feb 25, 2015, 10:33 PM
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Another from this site
http://www.rcgroups.com/forums/showthread.php?t=757539
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Old Feb 26, 2015, 06:44 AM
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What about something like Robsters super slow flyer scaled up the original used a 4 mm direct drive with a 14 inch wing! scale it up to 25 inches and build it minimally 8th inch balsa for the wing 1/16 for the tail and 1/4 inch for the fuselage.

Do you think this would work?

Thanks!
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Old Feb 26, 2015, 01:38 PM
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That would work. Here's one built by Ray Harlan.
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Old Feb 26, 2015, 02:12 PM
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I bet that thing floated forever!
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Old Feb 26, 2015, 02:22 PM
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Whew don't walk fast with that one, you will break it!
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Old Feb 26, 2015, 02:56 PM
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in persuit of low wing loading
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Personally, I would built it out of foam (but balsa would work too), and I'd build it to come apart for transport. Think about the big Ikarus indoor planes from the early days of indoor/parkflyers. The wing halves plugged in, and then rigging was attached.
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Old Feb 26, 2015, 03:30 PM
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perplexed genius
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Ok thanks! have to pick up some foam for it though.
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Old Feb 27, 2015, 11:46 AM
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You might like a lightweight kolibri like I built here http://www.rcgroups.com/forums/showt...hlight=kolibri
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Old Feb 27, 2015, 02:15 PM
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If I ever get around to it I have a design in my head. It would be a very big and slow floater Dr-1 triplane. Probably about 24 inch span. However, the difficult part is I would want it to come apart and pack flat in a box. Otherwise it would be a nightmare to transport. Essentially it would be a larger version of the Tripe I posted the link to above. Whether I'll ever do it remains to be seen.
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