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Old May 07, 2006, 02:21 PM
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jetco thermic 72?

Hi Folks,
New to the group and to the hobby here. I had built a Thermic C when I was a kid and now am reviving the hobby...

Not even sure if this is the right forum category for this query:

I'm interested in the new Thermic 72's from either Tom Martin or Sky Bench. I believe they are both "Short Kits" (not sure even what that means - is it that large pieces are not included?)

What are the pro's and con's of either? I am interested of course in flying this thing with RC, perferably handlaunch if that is even possible.
Any thoughts or advice?

Regards,
Sanders
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Old May 07, 2006, 03:11 PM
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Sanders -

You should probably have this thread moved over the general Sailplane Talk forum. A Thermic really doesn't have much in common with the slope sailplanes we generally fly (or discuss).

Tom Martin and Sky Bench both produce quality kits, so I don't think you'll go wrong with either. A short kits generally means that all the major parts like ribs and bulkheads are included, but strip wood, sheeting and general hardware are not.

Pete
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Old May 07, 2006, 06:59 PM
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try Thermal forum.

Some notes on TMRC Thermic kit in that forum. Good kit, nice laser cutting. I've started a Thermic, but temporarily on hold while I finsh a few other birds. These early Thermics came in pod/boom and full fuse versions. 72" Thermic I bought from TMRC is a pod/boom style- great classic shapes on this thing, which is why I wanted to build and fly it. RC modifications not shown on plan- plan is a copy of original. But those mods should be fairly easy. Plenty of room for gear in pod.

It is a "short kit"- these days "short kit" seems to mean a kit of all the curvy bits already cut for you; wing ribs, wing tips, rudder tips, fuse bulkheads, etc.. But it does vary from kitter to kitter- so it pays to check with the kitter. (Ray/Skybench and Tom/TMRC are both helpful and reachable via email.) The Thermic 72 from Tom includes things like spar and tapered boom- quite a bit of nice wood included in kit.

Not sure of handlaunching the Thermic- I'm no expert there. There are better performance oriented handlaunch gliders out there- check handlaucnch forum. I plan to slope mine on lazy light days and probably give it a hi-start launch on occaison. (If you are looking into a built up glider and might want to try discus launch- take a look at the Gambler.)

cheers
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Last edited by wingbeat; May 07, 2006 at 07:09 PM.
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Old May 10, 2006, 09:27 PM
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Use a 100' kite string towline, and I suspect theres instructions on the plans for a drop-off sub rudder. You set it up for a left hand turn, and trim the drop-off rudder to cancel it out. Have a friend run a few steps with you, and the plane will fly right out of his hand, and will be over your head in about 2 seconds. Stop running and the towline drops off the towhook, and pulls the drop-off rudder off as well. The plane will go into a left hand pattern. You'll love towline, its a kick. Theres still quite a few towline kits around.
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Old May 10, 2006, 11:29 PM
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Quote:
Originally Posted by slopemeno
Use a 100' kite string towline, and I suspect theres instructions on the plans for a drop-off sub rudder. You set it up for a left hand turn, and trim the drop-off rudder to cancel it out. Have a friend run a few steps with you, and the plane will fly right out of his hand, and will be over your head in about 2 seconds. Stop running and the towline drops off the towhook, and pulls the drop-off rudder off as well. The plane will go into a left hand pattern. You'll love towline, its a kick. Theres still quite a few towline kits around.
YES! I used to fly the hell out of a Thermik 36 back in the 70s. Ah the simple days!

Randy
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Old May 10, 2006, 11:54 PM
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Thermic 50 myself, but I had a Thermic C for a while as well when I was around 8 or so. The 50 lasted a whole summer and really flew. I also built all the Thermic B, 18's, Darts, etc. My local hobby shop in Santa Rosa CA had Jetco Kits up till the late 70's. I still have a few Jetco decals.
I have all the plans for the 100, 72, the X's,Troopers,etc. I came into a few bucks and bought every plan I wanted from John Pond back in the 90'd before he died.
I really want to build the 100 and fly it FF.... Butyrate Dope, Silkspan, Amberoid, DT's. Remember trying to teach someone who'd never towed before? Having a my neck make a "pop" as I tried to look up and over my shoulder at the same time?...Simple cheap fun. My 50 bit the big one when it wrapped around a light pole going downwind one afternoon back in 1977 or so. I found the horizontal stab recently while going through a box of stuff.......


We now return you to your regularly scheduled slope chatter.
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Old May 11, 2006, 12:06 AM
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yes! that is what got me back into this all: recalling my tribulation with a thermic C when i was a kid. i covered it with the paper and dope and it all warped up. i tried to fly it but it was too tweeked i guess. And that's about the same time i discovered gurls...
so I notice the price diff between skybench's and tom martin's thermic 72 (about $30). any experience with either?
It may be a moot point, as it seem I should probably go with the thermic 100 which only skybench makes.
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