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-   -   Prettner’s 1987 Supra Star 60 build thread (https://www.rcuniverse.com/forum/classic-rc-pattern-flying-379/11679495-prettner%92s-1987-supra-star-60-build-thread.html)

ehsanmorshedi 06-08-2020 10:55 PM

Prettner’s 1987 Supra Star 60 build thread
 
Hi all

Finally I found a lot of time in quarantine days of COVID19 to make one of my favorites.

this will be an image based thread with no or less explanation.

Ehsan
https://cimg5.ibsrv.net/gimg/www.rcu...f0b9e1156.jpeg
Foam cores from 12kg/m3 density foam. Cut with a simple home made hot wire foam cutter
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1.5 mm balsa skin
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Foam is hollowed with dremel and round Cylindrical sandpaper
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Reinforcement of wing and landing gear mount with glass fiber strips an carbon thread
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ehsanmorshedi 06-08-2020 11:10 PM

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ehsanmorshedi 06-08-2020 11:23 PM

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ehsanmorshedi 06-08-2020 11:32 PM

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ehsanmorshedi 06-09-2020 12:00 AM

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ehsanmorshedi 06-09-2020 12:21 AM

I will post more images soon

airsteve172 06-09-2020 02:02 AM

It's so nice to see clean workmanship!!! :D

ehsanmorshedi 06-09-2020 03:25 AM

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ehsanmorshedi 06-09-2020 03:39 AM

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ehsanmorshedi 06-09-2020 03:44 AM

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Special thanks to my son, Parsa, for his help in covering❤️❤️

ehsanmorshedi 06-09-2020 04:14 AM

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canopy was for a crashed ARF CAP 232 , nice match


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ehsanmorshedi 06-09-2020 06:06 AM

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Frédéric Garnier 06-09-2020 07:03 AM

Beautiful building.

doxilia 06-09-2020 08:30 AM

Ehsan,

outstanding build!

congratulations on a beautiful job.

I see that Deluxe Materials is well represented in your neck of the woods. :)

I’m expecting some water borne (WB) Sand ‘n’ Seal wood grain sanding sealer from them in a day or two. Curious if it’s as effective as dope based products.

BTW, I’m not sure the WB Eze-Kote Polycrylic is very fuel proof. It’s a glass embedding resin. They do have a product called Eze-Dope which is also WB and is fuel proof to 40% nitro (tested). I thinks it’s essentially cross linked Polycrylic or something similar. Intended for attaching tissue to light wood frameworks but works for fuel proofing firewalls too! Of course, the Z-Poxy Finishing Resin is amazing too.

David

P.S. Interesting wing attachment method!

ehsanmorshedi 06-09-2020 09:50 AM

Hi David,

I have used EZ dope on my tissue covered P-30 rubber planes a lot.

have not tested if it is fuel proof or not but I’m sure its not water proof unless is applied in several thinned layers or a straight coat.

the other product I love is cover grip. It works just like its thinner based brother “stix it” .

dries fast and sticks well after applying heat and pressure even on oily balsa.

I have also used EZ dope on my F2B planes to seal poly span covering
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ehsanmorshedi 06-09-2020 10:26 AM

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https://cimg3.ibsrv.net/gimg/www.rcu...fc47179e9.jpeg

ehsanmorshedi 06-09-2020 10:31 AM

Hope this image based build thread was interesting for all of you classic pattern lovers.

Regards,
Ehsan

ceccherini.v 06-10-2020 12:58 AM

Supra Star
 
Really well done job, congratulations, how much does it weigh in flight order? I have just finished building the Calypso from Rodney Ford's plan and would like to make another Prettner model, is it possible to have a copy of the Supra Star project?

Thanks in advance for the answer

ehsanmorshedi 06-10-2020 02:46 AM


Originally Posted by ceccherini.v (Post 12610659)
Really well done job, congratulations, how much does it weigh in flight order? I have just finished building the Calypso from Rodney Ford's plan and would like to make another Prettner model, is it possible to have a copy of the Supra Star project?

Thanks in advance for the answer

Hi,

plans are available in “ outerzone.co.uk “ for free download, but the name is dupli star instead of Supra Star.

Weight without fuel is 3570gr
powered with OS AX 75 turning a 12x8 prop

I also tested 13x7 but flys better with 12x8
and now after 40 flys has been trimmed well, and now I just flip the prop and enjoy.

strongly recommended to build.

by the way please share some photos of your newly born Calypso.



Ehsan

H5606 06-17-2020 01:57 PM

Immaculate craftsmanship and thorough documentation!

Thanks very much for sharing -

cap102 08-13-2020 12:24 AM

Hi Ehsan,

it was a pleasure to watch your build!! Thank you very much!!
This is the Curare I built from scratch.

Regards

Achim

https://cimg5.ibsrv.net/gimg/www.rcu...11598e4246.jpg

Jetstream 08-15-2020 06:15 PM

Very nice work! Enjoyed the build thread 👍

dhal22 08-22-2020 04:39 PM

Just getting to this thread. Wonderful work.

bandit_av 09-20-2020 12:37 AM

Hi Ehsan
It was a pleasure to read your thread, a real awesome craftsman work and very knowledgeable thread.


AndyMay 10-02-2020 04:45 AM

Superb pictures and meticulous build . Thank you for taking the trouble to post the log .


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