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The Cyprus A10 THUNDERBOLT

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02 Apr 2017 20:53 #151 by Ex-Member
Replied by Ex-Member on topic The Cyprus A10 THUNDERBOLT
That section looks like the classic 'supercritical' section used on aircraft that fly at mid-subsonic speeds. It has a bulbous lower surface and an under cambered flap at the back.

Are you building this one from a plan BB, or designing it yourself. If it's the latter, I'd consider changing the section to something a bit more friendly at model aircraft speeds. A supercritical section may not work effectively at the Reynolds Numbers we fly at.

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02 Apr 2017 21:41 #152 by Eric
Replied by Eric on topic The Cyprus A10 THUNDERBOLT
That looks like one of the Wortmann glider sections, with that flat on the front upper, and the hint of undercamber. If I recall, not very successful in model sizes, as Andy said. Have a look at Eppler 374, if you can find the co-ords, a much better model size section, and reasonably thick for stiffness.
if you are calm and collected when all about you are going berserk - you've missed something important!
Thanks: THE BLACKBIRD

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02 Apr 2017 21:51 - 02 Apr 2017 21:53 #153 by THE BLACKBIRD
Replied by THE BLACKBIRD on topic The Cyprus A10 THUNDERBOLT
The flat on the top is only on the section of wing between the fuselage and the under carriage housing, there is a sectioned part that fits on there like a leading edge flap, Making it up as I go along mainly Andy, I will do a normal section then thanks for the input
Last edit: 02 Apr 2017 21:53 by THE BLACKBIRD.

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04 Apr 2017 19:46 - 04 Apr 2017 19:50 #154 by THE BLACKBIRD
Replied by THE BLACKBIRD on topic The Cyprus A10 THUNDERBOLT
Here is the new wing rib

Had to redo the fairing between the engine pod and the fuselage as the resin never hardened

I need a canon on the front, thought about what I could make it from, so decided to do it in fibre glass
So got some chemi wood and started carving







I drilled indents where the holes will go, put some black paint in them so they would show up


Gave the plugs and coat of resin
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Last edit: 04 Apr 2017 19:50 by THE BLACKBIRD.
Thanks: Klipkopwildlife, blue123, Ex-Member, Ralpharr2001, Firewood

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04 Apr 2017 20:20 #155 by Ex-Member
Replied by Ex-Member on topic The Cyprus A10 THUNDERBOLT
Loving the cannon, great bit of building.
you have certainly got the building bug again Tony.


Tony B

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04 Apr 2017 21:39 #156 by Eric
Replied by Eric on topic The Cyprus A10 THUNDERBOLT
I do hope you are going to glass-up that cannon in two halves - otherwise those drilled indents will not let the cast off the plug! :evil:
if you are calm and collected when all about you are going berserk - you've missed something important!
Thanks: THE BLACKBIRD

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04 Apr 2017 21:41 #157 by THE BLACKBIRD
Replied by THE BLACKBIRD on topic The Cyprus A10 THUNDERBOLT
yes Eric that was the intention

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06 Apr 2017 20:08 - 06 Apr 2017 20:11 #158 by THE BLACKBIRD
Replied by THE BLACKBIRD on topic The Cyprus A10 THUNDERBOLT
Spent a lot of time sanding and filling the plugs from the engine housings, also filled in the indents in the canon, j miscounted the barrels :S I had eight. there are only seven
Then I gave them a few coats of paint, more filling and sanding to follow

I drew and cut out a full set of 28 ribs, still some work to do on them yet
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Last edit: 06 Apr 2017 20:11 by THE BLACKBIRD.
Thanks: Klipkopwildlife, Quorneng, Ex-Member, Ralpharr2001, boz, Firewood

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06 Apr 2017 20:10 #159 by Ex-Member
Replied by Ex-Member on topic The Cyprus A10 THUNDERBOLT
Yet more brilliant work from a building master.

keep up the good work

Tony B

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07 Apr 2017 19:19 #160 by THE BLACKBIRD
Replied by THE BLACKBIRD on topic The Cyprus A10 THUNDERBOLT
Very little done today what with one thing and another,, shopping, gardening blah blah :(
Finished cutting the ribs and started to build the wings, free hand



That's all
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Thanks: Eric, Klipkopwildlife, Quorneng, blue123, Ex-Member, boz, Firewood

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08 Apr 2017 18:46 #161 by THE BLACKBIRD
Replied by THE BLACKBIRD on topic The Cyprus A10 THUNDERBOLT
A bit more done the other wing panel and the tail plane





Started carving the wing tip
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Thanks: Klipkopwildlife, Quorneng, blue123, Ex-Member, boz, Firewood

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08 Apr 2017 19:21 #162 by Eric
Replied by Eric on topic The Cyprus A10 THUNDERBOLT
It might be camera distortion, but that l/h wing, top pic, looks to have the ribs upside down! :P
if you are calm and collected when all about you are going berserk - you've missed something important!

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08 Apr 2017 19:33 #163 by Ex-Member
Replied by Ex-Member on topic The Cyprus A10 THUNDERBOLT
Wonderful work again Tony.

Tony B

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09 Apr 2017 05:34 #164 by THE BLACKBIRD
Replied by THE BLACKBIRD on topic The Cyprus A10 THUNDERBOLT
They are the same both sides Eric :P

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09 Apr 2017 19:11 #165 by Eric
Replied by Eric on topic The Cyprus A10 THUNDERBOLT
Do you mean that you have built both panels with the ribs upside down? [badass] :woohoo: :P
if you are calm and collected when all about you are going berserk - you've missed something important!
Thanks: THE BLACKBIRD, boz

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