Simple fun is so often the best - RCCanada - Canada Radio Controlled Hobby Forum
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Old 08-13-2020, 11:30 AM   #1
MJD
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Simple fun is so often the best


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Every now and then my love of catapult gliders takes over and I go on a minor binge. Lately I've made 3 copies of this basic model, using balsa leading edges and depron panels. Wings are 1/4" x 4" x 22", 20% stab, weight just under an ounce. Typical evening air flight time 45-50s as you see here, not a competition model but a quickly built fun thing with a nice slow sink rate. This is my version of meditation. This is often how I spend the last 20-30m of the daylight. MY wife says I don;t exercise enough so I put on her Fitbit when I went out with one of these the other day - 2230 steps. See, models are good for you, esp free flight if there is a light breeze!

Often I find this just as satisfying as flying a big aerobatic model or whatever, the ratio of cost and effort to pleasure is remarkably high. Plus there is no better way to get your trim and balance act together.

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Old 08-13-2020, 11:39 AM   #2
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Re: Simple fun is so often the best

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Every now and then my love of catapult gliders takes over and I go on a minor binge. Lately I've made 3 copies of this basic model, using balsa leading edges and depron panels. Wings are 1/4" x 4" x 22", 20% stab, weight just under an ounce. Typical evening air flight time 45-50s as you see here, not a competition model but a quickly built fun thing with a nice slow sink rate. This is my version of meditation. This is often how I spend the last 20-30m of the daylight. MY wife says I don;t exercise enough so I put on her Fitbit when I went out with one of these the other day - 2230 steps. See, models are good for you, esp free flight if there is a light breeze!

Often I find this just as satisfying as flying a big aerobatic model or whatever, the ratio of cost and effort to pleasure is remarkably high. Plus there is no better way to get your trim and balance act together.

https://www.youtube.com/watch?v=nxkSSzqsiZk
Iíve always said I enjoy flying small rubber powered stuff just as much as the big expensive stuff. Itís more satisfying to get a decent flight out of one. Similarly with HLG or what youíre doing. Thatís true love of the hobby of model aviation.
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Old 08-13-2020, 11:59 AM   #3
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Re: Simple fun is so often the best

I say that you always learn a hell of lot more about how aircraft work from these models than you do the big guys. It's akin to an airline pilot with a bunch of glider hours.. what better skills foundation can you find? In the end when the engines quit, guess what you're left with.. Sully and others can elaborate on that.
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Old 08-13-2020, 12:51 PM   #4
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Re: Simple fun is so often the best

Pretty cool Mike thanks for sharing buddy! How you doin anyway? staying healthy through this mess?
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Old 08-13-2020, 01:10 PM   #5
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Re: Simple fun is so often the best

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Pretty cool Mike thanks for sharing buddy! How you doin anyway? staying healthy through this mess?
Yeah man, all good. And you?

Why not send me your coordinates in a PM? It would be good to chat and catch up. Missed catching you again before we left KW last time.
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Old 08-13-2020, 01:25 PM   #6
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Re: Simple fun is so often the best

Next one I am using sheet stock for the wing LE and sanding in an official low Rn Drela airfoil using templates. Will be interesting to see the effect on sink rate. I realize the lovely surface finish could throw theory to the wind, but why not? I reinforced the foam TE by rubbing wood glue into the last 1/4", helps avoid nicking to a degree.

Standard trim is left rudder, tweak up on the right elevator tab, and form a bit of wash-in into the TE of the left inner panel. Adjust CG until you just lose any noticeable pitch oscillation, it wastes energy. The wash-in tends to keep the left wing up during launch allowing a higher climb, and prevents any tendency to develop a spiral dive in the glide should it get upset. It will do this consistently launch after launch, as long as the launcher is consistent that is.

I believe the sink rate is around 1 foot per second, check out later in the glide with background reference. There is no lift cruising through the field at this time of the evening. Up top behind the camera is a paved skating rink/b-ball court, and this glider has circled 3-4 times at nearly constant altitude over the asphalt in the evening after a hot sunny day. I can even get a solid bump on a 2m foamie glider by circling over it.
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Old 08-13-2020, 03:49 PM   #7
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Re: Simple fun is so often the best

So cool Mike!
Thanks for a great video.
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Old 08-13-2020, 06:33 PM   #8
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Re: Simple fun is so often the best

Very Cool
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Old 08-13-2020, 07:53 PM   #9
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Re: Simple fun is so often the best

Just plane ol awesome, and looks like fun. How long does it take to punch one of these out? Are there plans or drawings available, as I do have some foam here waiting to be used, and after seeing this, would be neat to try. Thank you.
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Old 08-17-2020, 08:34 AM   #10
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Re: Simple fun is so often the best

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Just plane ol awesome, and looks like fun. How long does it take to punch one of these out? Are there plans or drawings available, as I do have some foam here waiting to be used, and after seeing this, would be neat to try. Thank you.
I think it takes me about 2 - 2.5 hours or so total to build one. Pretty simple. I have the plans about half done in CAD at the moment, I'll post a copy once they are legible.

Yeah they are fun, I love simple gliders HLG or catapult. At 59 with arthritis, I prefer catapult these days - my HLG arm has pretty much retired.
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