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Do 'high wingers' make good PSS subjects?

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Flyer27/11/2015 22:15:43
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As per title, just come across a 'large plan', and was wonder if I could ditch the engines and just go PSS?

Have seen an Antelov (Simon Cocker one???) and think this may well be do-able. Looking at wingspan approx 120 inch.

Any pointers welcome.

cheers

Ade

Matt Jones27/11/2015 22:39:31
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Ade, what's the subject? There's nothing that won't work, recently we've had F104, big Lancaster, Lightning etc. There's no reason it wouldn't work.
Flyer27/11/2015 22:42:52
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Thinking herky bird, I have a plan; I think its 120 inch or so......will have to work out weight.

I will probably try a mix of depron and bala; expetced start date Feb 2016........ flight time........ within this parliament!!

smiley

Matt Jones28/11/2015 07:05:14
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That'll go well and has also been proved on the slope. I've fancied a C130 or A400m for a while
Peter Garsden28/11/2015 07:34:24
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I wish I knew what all these numbered airoplanes were. Must do some anorak swotting.

At first, when I read this I though you were asking about whingers, which of course is something else altogether?

Sorry for the abject nonsense.

Though I would bow the superior knowledge of our PSS guru Mr Jones in all things, it is worth saying that usually we alter the wing section to something glider like and thinner for penetration, and increase the wing area. Matt, however, who is a scale afficianado prefers to stay scale and build light. Personally I prefer beefy and slightly heavier using a lost foam fuselage.

Edited By Peter Garsden on 28/11/2015 07:35:05

Phil Cooke28/11/2015 07:58:44
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Peter Waller built a big PSS Herc very early in the development of PSS, there's a photo of it in this historical article linked HERE.

Note also theres a number of John Plumbley builds shown here, including the Typhoon now owned and operated by Steve Houghton.

Flyer28/11/2015 10:46:47
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Thanks Phil for the link, very very interesting. I note your comments with regard to wing section Peter, I was considering a rib profile that was more 'glider-like', but without taking away the scale looks. And at 120 inch, there should be adequate wing area, as long as I can build light enough. I am considering using the engine nacelles to house the church roof, but would that affect the flying characteristics? I would imagine that as long as the plane is laterally balanced, this should not be a problem. Or could I keep the wings lighter by housing any ballast on the CoG in the Fuselage.

I suppose for me it will be a case of very much stand off the other side of the slope scale....

Cheers

Ade

Matt Jones28/11/2015 10:54:49
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Ade, the Herc already has a mighty wing so you won't need to stretch it at all and I wouldn't go mad for all out light weight, big models can be made too light believe it or not. You need some weight behind it to keep it moving thumbs up Aim to keep the back end light and you'll be fine and shouldn't need too much lead to balance it, work out the wing area and aim for an AWU that gives a loading around 18-22 oz/sq' as a starter, 12-15lbs would be where I would be thinking. As for sections the Eppler 374 and 205 profiles have been used for many years and go well, both are quite thick so will represent the full size section nicely.

Shout if either Phil or I can offer any guidance, happy to help wink

Monz28/11/2015 12:52:38
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The Herc will be great. If you're going to use depron and balsa, just build it and don't worry about weight, obviously heed the 'keep the tail light' advice, but apart from that it will come out much lighter than you'd anticipate.

My big Bucc is 7.5lbs using depron and glass cloth and is completely underweight! To the point that it will need ballast in even lightish conditions just to be able to penetrate!

Andy Meade01/12/2015 11:28:18
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Herc-wise I'd have to go for an AC-130, and fit airsoft guns in the side for strafing the pits cool

Flyer01/12/2015 11:31:29
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Posted by Andy Meade on 01/12/2015 11:28:18:

Herc-wise I'd have to go for an AC-130, and fit airsoft guns in the side for strafing the pits cool

Funny you should say that; it's the one that I do fancy. The spectre is the one that is rarely seen. ...........coming to a slope near you soon...........

Andy Meade01/12/2015 11:34:47
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Oh you beauty laugh Now that, I'm looking forward to yes

Flyer01/12/2015 21:09:18
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Been spending the last few evenings pondering profile, so have agreed I think to using the Eppler 205, as this appears to be a good compromise.

Is it a good idea to introduce washout too?

Matt Jones01/12/2015 21:11:25
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I would suggest so, 1.5 - 2 degrees.
Flyer01/12/2015 21:22:37
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Would that be 1.5 -2 degrees at root and up to 0 at tip?

Matt Jones01/12/2015 21:30:02
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One consideration is the flying attitude of the full size. For example some aircraft fly with a distinct nose down attitude so I'd put some positive incidence at the root to achieve the right 'sit' in the air. Hercs sit flat so I'd set the wing root at 0 with the fuselage datum and then set washout to give -2 degrees at the tip.

Not saying it's the best option but it's where I'd be thinking.
Flyer01/12/2015 21:32:46
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Aha, thanks for that Matt, makes sense now. I'll give that a go. Now off to print out rib profiles.

Mowerman02/12/2015 10:18:40
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At my local slope a couple (?) of years back a chap arrived with a high wing trainer, removed the prop and u/c the chucked it into the wind. It flew well so in answer to the original post, Yes high wingers are OK for the slope so scale high wingers should be fine,

Edited By Mowerman on 02/12/2015 10:20:38

Andy Meade09/12/2015 11:40:17
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Inspired by Mr Flyer's AC130, I thought I better get on and do something.

A 1/16th(ish) C17 Globemaster III. 3.4m wing span / 3.3m long, 5-piece model. I am kitting two, as some weird bloke wants one as well as me.

progress05 former tweaks.jpg

progress06 launch.jpg

Throw my plane, human!

Matt Jones09/12/2015 11:53:38
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Looks nice, will be impressively big. I look forward to you and the weird one doing some syncro aeros. I feel another Sunday night request coming on.................

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