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Author Topic: Jasco Thermic 20  (Read 2659 times)
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Mark Braunlich
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« on: April 20, 2009, 12:22:08 PM »

Just completed Jasco Thermic 20 for hi-start launching built from Frank Zaic's 1944 MODEL GLIDER DESIGN. Hand launches so far look encouraging. How many free flight modelers started here?
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Jasco Thermic 20
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Mark
HatzLymanC
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« Reply #1 on: April 20, 2009, 09:36:50 PM »

Looks nice Mark. I was looking over my Thermic plans just this week end. I have 3 versions of the "20". The one you just finished, an older version with the wing mounted between the pod and boom, and the Jetco version. Are you going to set up the high start as per the plans, or do you have something else in mind?

Lyman
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Tmat
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« Reply #2 on: April 21, 2009, 12:53:40 AM »

Very pretty. Grin
Details on the high start?

Tmat
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F1B guy...
But don't hold that against me!
High Point
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« Reply #3 on: April 23, 2009, 10:48:35 AM »

Mark, beautiful job! Please tell us the steps you used for your finish after all was sanded.

Curtis
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Mark Braunlich
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« Reply #4 on: April 23, 2009, 06:58:40 PM »

Lyman, Tmat,

Here are details for the Hi Start launch method off the plan I used.  Post sticks up about 12 inches above the ground. Wire loop at the end of the kite string can be a simple paper clip. Wire hook on the bottom of the fuselage is about 1/8" forward of the leading edge of the wing. This is NOT the location one would use for catapult launch.

Curtis,
Tail surfaces have one unthinned coat of Sig nitrate sanded with 400 and then 800 dry sandpaper.

Fuselage and wing have one coat of Sig low-shrink butyrate followed by two thickish coats of grain filler made from low-shrink butyrate and talcum powder made to the consistency of honey. This doesn't fill the worst of the grain but it fills 90% of it. Most of that gets sanded off. The worst of the dents are filled with Elmer's Redi-Spack Lite. Following sanding, the spackling spots are given a coat of dope to seal it. The color is Sig Fokker Red dope sprayed on.
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Re: Jasco Thermic 20
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Mark
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« Reply #5 on: April 24, 2009, 10:43:43 AM »

Thanks Mark, I appreciate it...there's just a certain beauty of a glider design and finish like this.

Curtis
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larry530
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« Reply #6 on: November 15, 2012, 06:44:19 PM »

Mark,  i sure want to build one myself for bungee launch, what weight did your glider end up at, it would help to know what finished weight to shoot for,  yours looks awesome,  checked you tube if any one has ever done a video for jetco gliders but no luck in that,  it would sure be awesome to have video library on Hip Pocket for such things  Smiley
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dosco
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« Reply #7 on: November 16, 2012, 08:06:57 AM »

When you get the hi-start figured out, some flight reports would be informative and interesting.

Nice finish work on the glider!
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Clay
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« Reply #8 on: February 02, 2016, 10:58:31 PM »

Built a Thermic 20 from Jetco kit.  How much weight have folks had to use on the nose for ballast.  Up elevator to make it float?  I am in trimming phase and encountering a lot of weight on nose just to get CG in rear third of airfoil like plan says.

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Re: Jasco Thermic 20
Re: Jasco Thermic 20
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Visit Old Rhinebeck Aerodrome.
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-John-
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« Reply #9 on: February 19, 2016, 11:41:52 AM »

Hello Clay, the plan I have shows the "stabilizer negative", and the main wing airfoil somewhat cambered. It's likely that if the kit wood is heavy you'll have to compensate with a good amount of nose weight.

Where did you find the Jetco kit?
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FLYACE1946
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« Reply #10 on: February 19, 2016, 11:58:48 AM »

Look for this kit at Penn Valley Hobby in Lancaster, Pa.
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