Shackas

Hi all,

Following on from some weight-saving discussion in CombatPig's "Ultimate Bipe" thread, I wanted to add my 2c re. weight saving on coverings.

Have ya'll tried tissue (Silkspan etc.) OVER mylar? The free-flight guys started doing this a few years bvack and I've been an adsolute convert to the method since I covered my first set of F1J wings that way.

The mylar provides the "seal" (keeps the gooey stuff out of the inside of your wing) while the tissue/silkspan provides the torsional rigidity you may want if you've kept the structural weight down.

Funnily enough, while you're effectively using two layers of covering, the a.u.w. can be lower than straight tissue as you need much less dope to seal it off.

I get all goose-pimply just thinking about it!!!!

zoomzoooie

Tell me more...

What kind of mylar, what's the weight/sq.yd and where do you get it.

Now how do you apply it? How does it hold up to nitro?

Details please

ZZ

Shackas

I get my mylar from Model Research Labs (in the US):

http://www.modelresearchlabs.com/


or Mike Woodhouse (in the UK):

http://www.freeflightsupplies.co.uk/


MRL has a great description of how to use mylar:

http://www.modelresearchlabs.com/usi...materials1.htm


Mike sells some pamphlets under the "How To Do It" section on his wesite, and #4 is titled "
Mylar/Tissue Covering; 5 pages detailing the process of applying Tissue to Mylar. (17/10/03)
£1.50"

An elcellent online (free) description of the tissue-on-mylar technique can be found at George Stringwell's website:
http://www.stringwell.freeserve.co.uk/Covering.htm


On power models, I like to use Mike's 0.015mm (0.0005905" ) "Aluminised" mylar. Weight is 20.4 grams/sq metre.


Man, my goose-pimples just keep on going!!!!

zoomzoooie

Thanks Shackas, Looks like good stuff. I'll have to get some and try it.

ZZ