Flyer Posted November 27, 2015 Share Posted November 27, 2015 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 Quote Link to comment Share on other sites More sharing options...
Matt Jones Posted November 27, 2015 Share Posted November 27, 2015 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. Quote Link to comment Share on other sites More sharing options...
Flyer Posted November 27, 2015 Author Share Posted November 27, 2015 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!! Quote Link to comment Share on other sites More sharing options...
Matt Jones Posted November 28, 2015 Share Posted November 28, 2015 That'll go well and has also been proved on the slope. I've fancied a C130 or A400m for a while Quote Link to comment Share on other sites More sharing options...
Peter Garsden Posted November 28, 2015 Share Posted November 28, 2015 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 Quote Link to comment Share on other sites More sharing options...
Phil Cooke Posted November 28, 2015 Share Posted November 28, 2015 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. Quote Link to comment Share on other sites More sharing options...
Flyer Posted November 28, 2015 Author Share Posted November 28, 2015 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 Quote Link to comment Share on other sites More sharing options...
Matt Jones Posted November 28, 2015 Share Posted November 28, 2015 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 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 Quote Link to comment Share on other sites More sharing options...
Monz Posted November 28, 2015 Share Posted November 28, 2015 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! Quote Link to comment Share on other sites More sharing options...
Andy Meade Posted December 1, 2015 Share Posted December 1, 2015 Herc-wise I'd have to go for an AC-130, and fit airsoft guns in the side for strafing the pits Quote Link to comment Share on other sites More sharing options...
Flyer Posted December 1, 2015 Author Share Posted December 1, 2015 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 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........... Quote Link to comment Share on other sites More sharing options...
Andy Meade Posted December 1, 2015 Share Posted December 1, 2015 Oh you beauty Now that, I'm looking forward to Quote Link to comment Share on other sites More sharing options...
Flyer Posted December 1, 2015 Author Share Posted December 1, 2015 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? Quote Link to comment Share on other sites More sharing options...
Matt Jones Posted December 1, 2015 Share Posted December 1, 2015 I would suggest so, 1.5 - 2 degrees. Quote Link to comment Share on other sites More sharing options...
Flyer Posted December 1, 2015 Author Share Posted December 1, 2015 Would that be 1.5 -2 degrees at root and up to 0 at tip? Quote Link to comment Share on other sites More sharing options...
Matt Jones Posted December 1, 2015 Share Posted December 1, 2015 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. Quote Link to comment Share on other sites More sharing options...
Flyer Posted December 1, 2015 Author Share Posted December 1, 2015 Aha, thanks for that Matt, makes sense now. I'll give that a go. Now off to print out rib profiles. Quote Link to comment Share on other sites More sharing options...
Mowerman Posted December 2, 2015 Share Posted December 2, 2015 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 Quote Link to comment Share on other sites More sharing options...
Andy Meade Posted December 9, 2015 Share Posted December 9, 2015 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. Throw my plane, human! Quote Link to comment Share on other sites More sharing options...
Matt Jones Posted December 9, 2015 Share Posted December 9, 2015 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................. Quote Link to comment Share on other sites More sharing options...
Andy Meade Posted December 9, 2015 Share Posted December 9, 2015 Syncro aeros! Not sure I can manage that with a big lump like this. Have finalized the flap details now, so should stop on a dime. Quote Link to comment Share on other sites More sharing options...
Flyer Posted December 9, 2015 Author Share Posted December 9, 2015 oooooo now that does look nice. Wonder if the C130 should be 1/16th scale too........... Suppose the launchers will need to get into weight training too. Cant wait to get started (when work allows). Ade Quote Link to comment Share on other sites More sharing options...
Andy Meade Posted December 9, 2015 Share Posted December 9, 2015 I'm shooting for no more than 20lbs on this build, so a single man launch should be do-able. The formers are there just to give an idea for the shape, there will be big blocks of white foam in between them, hotwired to shape, then covered in brown paper & PVA Practically a thermaller hehe. Quote Link to comment Share on other sites More sharing options...
Matt Jones Posted December 9, 2015 Share Posted December 9, 2015 And speaking of white foam.. Quote Link to comment Share on other sites More sharing options...
Andy Meade Posted December 9, 2015 Share Posted December 9, 2015 Ah yes. Will text you fella, I'm off to Southampton this weekend so can possibly pickup on way back through Quote Link to comment Share on other sites More sharing options...
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