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Old 08-04-2010 | 11:23 PM
  #1196  
MTK
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From: Whippany, NJ
Default RE: SAP 180 (Syssa Performance)


ORIGINAL: flyncajun

Matt,
I `m debating on using a product called pollyspan for my wings nitrate dope then regular auto finish
Do you have any experiance with this product? it looks great!and a little more durable than Silkspan.

BTW
Do you have a before and after weight chart for the system your using verses Monocaote?



Bryan
Bryan,

I have a general weight gain, not after each step. Let's talk wing panels.....area is 525 sq inches; each panel complete with socket and servo mount in place before any covering but including aileron was 245-250 grams (just <9ozs). I fitted the panels to the fuse and built a fillet at the joint, adding another 1/4 oz. So each panel before covering was 9 1/4 ozs.

At this stage of finish, with no clear coat or lettering, my panels are 12 1/2 ozs. Add maybe another ounce for clear and lettering, and final weight should be around 13 1/2 ozs.

A monokoted panel would have been around 12-12 1/2 ozs finished and ready for equipment.

I picked up unnecessary weight in the yellow paint...it took 6 coats to hide almost everything and it is still not as solid as I would like. A different color would need 2 coats and much less weight. BTW- initially I used yellow KlassKote original formula and that didn't hide either and weighed even more than Stits. I sanded it all off and started over.

KlassKote new yellow formula hides similar to KB according to Ed Alt who used the stuff. I wish I had known in time. Lots and lots of unnecessary work.

To answer the question, I believe the method can produce as light if not slightly lighter weight gain than monokote. But have got to have good, solid pigment, opaque paints.

I wish there was a way to paint a whole scheme using a water based color cartridges used in printers. Just use a PC and plotter. Just imagine the design precision and complexity possible at very low weight gain. This should be straight forward for a CAD guy to develop the application. The plotter would need to be capable of 3D, like a robot