steven patey Posted August 11, 2017 Share Posted August 11, 2017 https://aerofred.com/details.php?image_id=99362 Quote Link to comment Share on other sites More sharing options...
Phil Cooke Posted August 11, 2017 Share Posted August 11, 2017 Steve - do you mean the A-10 as a sloper? - or that particular design of A-10 by George Miller? Certainly the A-10 has been done numerous times, its a winner from the slope - with an unswept wing of ample area - yes it has some draggy characteristic features but it manages those just fine. There's at least 2 on the UK PSSA circuit flying now, Andy Meade and Chris Barlow, and I'm aware of 2 others being built - one of those is in my garage! If your title question referred to that particular plan - then I'm unaware of that ever being converted to slope - my advice would be - GO FOR IT! Quote Link to comment Share on other sites More sharing options...
steven patey Posted August 11, 2017 Author Share Posted August 11, 2017 Hi Phil, yes I mean as a pss sloper. specifically from the george miller plan. BTW I saw the build thread for the enormous one you did a while back, what was the span and did you use the funny wing section of the full size A10 (which is shown on the G Miller plan), or a more conventional one. cheers steven. BTW this plan is 99" which seems pretty big. I think yours was quite a bit bigger though Quote Link to comment Share on other sites More sharing options...
Phil Cooke Posted August 11, 2017 Share Posted August 11, 2017 I've still not finished mine(!) - its 1/6th scale - 110" span - Andy Meade has finished his (same basic design) and Simon Cocker is 2/3rds through a similar build himself. All 3 moved from the 'as drawn' wing section AND tail incidence, both were pretty ridiculous for unpowered slope use... We chose an Eppler 374 section for the centre panels which translate through the outer panels into an increased thickness (12%) Eppler 205 at the tip, in an attempt to keep that scale solid wing look when viewed head on. Both sections are well proven from the slope and as Andy has proven, give the A-10 a steady going yet versatile performance. Quote Link to comment Share on other sites More sharing options...
Phil Cooke Posted August 11, 2017 Share Posted August 11, 2017 Here's a shot I took of Andy's machine getting away at the Great Orme last season... and here's mine, I just need to engineer the assembly joint in the fuselage halves then she's basically ready for glass. But its been in this state for 3 years now Quote Link to comment Share on other sites More sharing options...
steven patey Posted August 12, 2017 Author Share Posted August 12, 2017 I noticed the tail incidence was pretty extreme on the george miller a10 plan, also the wing section looked like it had been drawn round a welly boot, so glad you pointed me in the right direction there! Regards Steven Quote Link to comment Share on other sites More sharing options...
Andy Meade Posted August 14, 2017 Share Posted August 14, 2017 Shameless plugging of one's own A10 in flight : Quote Link to comment Share on other sites More sharing options...
Andy Meade Posted August 14, 2017 Share Posted August 14, 2017 I've just had a chance to look at the plan, it seems very nice. 99" is a good size too, and will allow you to get lots of scale detail in. The cockpit may be problematic, depending on how handy you are at making a plug I guess. Please run a build blog if you go for it, it would be very interesting to see, as I have often toyed with the idea of having a second A10 a little smaller, and a lot lighter. Mine weighs in at about 38lbs, but she is actually undergoing surgery at the moment that should allow me to remove noseweight (new tailplane and modified rear end). Good luck, and hope to see it on the slope in the future Quote Link to comment Share on other sites More sharing options...
steven patey Posted August 14, 2017 Author Share Posted August 14, 2017 Thanks for the great pics Andy, I've added them to my bumper scrapbook of unfeasibly large pss models you kneed a transit van to take to the slope in. Could you tell me what wing section, wing/tail incidences you used on the model? that would very be useful. You got me really interested in actually doing it now! As you rightly said it is an ideal size, not to large but big enough to have a good presence in the air Steven ps, I have been seriously wanting to do one of these about the same size, what am awesome model, John Hill's Pucara. I have a pretty good 3 view of it. I'm looking into getting a projector to blow up 3 views. would make life so much easier. Edited By steven patey on 14/08/2017 12:57:30 Quote Link to comment Share on other sites More sharing options...
steven patey Posted August 14, 2017 Author Share Posted August 14, 2017 38Ibs in weight! blimey, that's almost in LMA exemption territory! Quote Link to comment Share on other sites More sharing options...
Phil Cooke Posted August 14, 2017 Share Posted August 14, 2017 Steve - the wing is the same as on mine, we had 3 sets made at the same time... Eppler 374 section for the centre panels which translate through the outer panels into an increased thickness (12%) Eppler 205 at the tip. Quote Link to comment Share on other sites More sharing options...
Andy Meade Posted August 14, 2017 Share Posted August 14, 2017 Almost, yes, but not quite (20kg / 44lbs of course being the cutover). I eyeballed 2 degrees of "up" in the tailplane, and it could probably do with a degree more, and the wing sections were as per Phil's text above. Yes Si Cocker has that Pucara now, it really is lovely. Big PSS eh? My 15th scale C17 is currently getting glassed, so hopefully ready for April? hopefully...cross fingers etc. Quote Link to comment Share on other sites More sharing options...
steven patey Posted August 14, 2017 Author Share Posted August 14, 2017 2 degrees up? I'm assuming 2 deg positive incidence on tail. thanks for info steven ps I had considered eppler 205 for entire wing,as I wanted a floater, so I wasn't too far off the mark. Interesting how you used eppler 374 for the inboard sections.Is this a compromise between lift requirements and speed/penetration? I need to look into wing section theory a bit more (I did yrs ago, but have forgotten most of it) Quote Link to comment Share on other sites More sharing options...
steven patey Posted August 14, 2017 Author Share Posted August 14, 2017 bTW does Simon still fly the Pucara, god how I would love to see it fly! Also what happened to that huge antonov 225? I had the 1995 issue of QFI with this pic on the cover. Quote Link to comment Share on other sites More sharing options...
steven patey Posted August 14, 2017 Author Share Posted August 14, 2017 Andy, don't tell me you built that C17 in that tiny shed in the background lol! Quote Link to comment Share on other sites More sharing options...
Andy Meade Posted August 14, 2017 Share Posted August 14, 2017 If positive gives up elevator, then yes - I always get mixed up which is which, as it's a negative AoA, but the TE comes up. Sorry, I'm not really sure on why they chose the wing sections, it was pencilled up a bit before I got involved with the builds. I know the wing works well with flaps though, and just 4 or 5 degrees of down flap makes her shoot up like a thermaller The C17 was actually built inside the house - I have an indoors workshop The 225 was badly damaged after a large hatch blew off the nose, and as far as I am aware, has not been repaired as yet. Edited By Andy Meade on 14/08/2017 13:35:06 Quote Link to comment Share on other sites More sharing options...
steven patey Posted August 14, 2017 Author Share Posted August 14, 2017 I think the tail has a negative incidence, as the LE of the tailplane is pointing down wards in relation to fuselage centeline. that makes sense, as you want the tail to exert a downward force. that makes sense now. Edited By steven patey on 14/08/2017 13:43:26 Quote Link to comment Share on other sites More sharing options...
steven patey Posted August 14, 2017 Author Share Posted August 14, 2017 just seen youtube vid of A10. Quote Link to comment Share on other sites More sharing options...
Andy Meade Posted August 14, 2017 Share Posted August 14, 2017 The launch one? Took me half an hour to stop shaking before opening the taps a little Quote Link to comment Share on other sites More sharing options...
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