MIRO 2

[NZ Scythe]

Great Stuff

Hows's progress on the Miro today Rod?

[Rod]

Hi Patrick
I confess to doing zip on Miro today. Prepared for a presentation I did for Wgtn MAC tonight. Am considering whether to mold another better fuse for Miro. The one I did is OK but I could do better. Could save up to 100 gms and retain sufficient strength. Also confess to working on a 2.5M SU29KS which I will start posting on Get R Done soon.

[brusty]

'morning Rod, interesting comments. Questions.
1.What are you going to change in your layup if you do a second Miro fuz ?
2.Does the crushed white foam absorb much resin ? I notice you do an almost comlete coverage, whereas talking to Ewen a couple of months back, I think he used just a strip about 100mm wide the length of the fuz. I am considering a similar layup in the 2m Sukhoi SU-31 I'm currently doing so am vitally interested.
3.What is Get R Done ?? and why would you post there ?

As you can see I am thirsting for knowledge !!!

Cheers, Barrie.

[Rod]

Hi Barrie
To lighten the fuz I would eliminate the 200 gm carbon in the nose and probably just use S glass so there were 2 layers of S glass in the nose. I put an extra layer of S glass up the trailing edge of the fin I would eliminate that. Instead of 75gm glass for the first layer I would use 25 gm.

The foam adds a huge amount of stiffness. I suppose I am experimenting to see if more is better and I think it is but is more difficult than the 100mm strip. It does obviously need resin on it and getting the right amount is a bit tricky. I think the best way is to paint it on and get good coverage the towel of the excess.

Git R Done is in the giant scale section and is for build threads.

[Neogenesis]

This is a amazing thread guys....I wish I only had a sliver of the talent you have in one of your fingers......and three less kids and more free time....but that's another story.

Keep up the good work.....I'm watching from the sidelines........oh...and I'm a Sukhoi fanatic.



Neo

[brusty]

	Quote: Originally Posted by Neogenesis
	This is a amazing thread guys....I wish I only had a sliver of the talent you have in one of your fingers......and three less kids and more free time....but that's another story. Keep up the good work.....I'm watching from the sidelines........oh...and I'm a Sukhoi fanatic. Neo

Three kidz iz okay Neo, its just that we had ours a long time ago. Stick with it, you'll come right !!. Barrie.

[Rod]

Not me mine are 6 and 9 and it is school holidays.

[Rod]

I had left the leading edges on the cores uncut so the edges wouldn't crush. So I cut them off with the band saw, 4.5mm back from the LE of the foam. Then glued the leading and trailing edges on with epoxy and microballoons. I used PU glue last time but found it a bit difficult to sand.

[brusty]

	Quote: Originally Posted by Rod
	Not me mine are 6 and 9 and it is school holidays.

Its grandchildren for us, but they're okay 'cos you can give 'em back !!

Thats looking nice Rod, what weight of balsa are you using, thickness and sheet weight ? I tried to keep 1.5mm 4ft sheets at 20 grams or under, it took a bit of searching and weighing. I'm looking forward to hearing what the finished wings weigh with joiner, and your finishing surfacing method.

pics attached of my 2 meter sukhoi wing and Stab, a much thicker wing, 94mm root thickness, white foam with ply spar and balsa inserts at L/E, T/E and hinge line and two layers of brown paper. As usual, over built and I am about to do another in the light of what I have learned from this one, it weighs in at 41 ounces todate, thats hinged and ready for paint. The tailplane is 7.1 ounces.

Cheers, B.

[NZ Scythe]

Your Sukhoi wings look pretty sweet Barrie - Is this Brown Paper method where you skin the foam with a layer or two of brown packaging paper instead of basla? I've heard of it I think but never tried it myself... are there any advantages over balsa? I guess it would be quicker than balsa sheeting and it would be easier to seal for painting??

You should start a thread here on Flying Giants showing us the process you go through to make your next Sukhoi - you should also make a 50cc size sukhoi! it you build it light enough I might even get you to make me one!

[Imac Kiwi]

	Quote: Originally Posted by NZ Scythe
	You should start a thread here on Flying Giants showing us the process you go through to make your next Sukhoi - you should also make a 50cc size sukhoi! it you build it light enough I might even get you to make me one!

Steady on there Patrick

I'm still working on Barrie to make another Raven so I can put a turboprop in it

Cheers
Alan

[brusty]

	Quote: Originally Posted by Imac Kiwi
	Steady on there Patrick I'm still working on Barrie to make another Raven so I can put a turboprop in it Cheers Alan

Whoa there fellahs, so much to do and so little time !!

Yes Patrick, I will start another thread in this area once I have made a new lighter wing with the mods I envisage, better to prove it first, and leave this thread to Rod's good work. Cheers, B