Terence Lynock Posted October 22, 2011 Share Posted October 22, 2011 Instead of faffing aboutr over the winter and ending up with half a dozen Depron or Balsa models that will probably never be flown I thought I would concentrate on just one and see how it turns out. I have Brian Taylors plans for a 109F which I have reduced to about 1/7th scale, this gives a 45.75'' span, other changes will probably be a Selig 3021 airfoil section with adaquate washout and a lightened airframe, like all WW2 fighters the problem may be wing loading. In theory it should work but are there any points to be aware of?. Quote Link to comment Share on other sites More sharing options...
Alan Cantwell Posted October 22, 2011 Share Posted October 22, 2011 i flew a MK24 spitfire, that was heavy as a heavy thing, it flew in high wind, and was lots of fun, right up to the moment it hit a planet, go for it, but also, the PSS boys have their own forum, might be worth an ask there? Quote Link to comment Share on other sites More sharing options...
Alan Cantwell Posted October 22, 2011 Share Posted October 22, 2011 or they did, cant find it now Quote Link to comment Share on other sites More sharing options...
David Gilder Posted October 22, 2011 Share Posted October 22, 2011 PSSA Online forum should be Here! Quote Link to comment Share on other sites More sharing options...
ken anderson. Posted October 22, 2011 Share Posted October 22, 2011 i sold my ripmax spit to one of our club members---- he had it flying off the local cliffs as a glider and it went like a goodin..... the landings were excellent...so docile etc...... ken anderson ne..1. spit(i want it back) dept. Quote Link to comment Share on other sites More sharing options...
Terence Lynock Posted October 22, 2011 Author Share Posted October 22, 2011 I was thinking on a Spit 22 a few weeks back, I have the plans for a 49'' span version that could easily be lightened and with the wing area it would make a nice glider, may have another look at it over the winter if I decide against the 109F, just where I get a 109F spinner at about 1/7th scale I dont know unless I stir up me gray matter and actually spin one on a mandrel on me lathe. Quote Link to comment Share on other sites More sharing options...
MattyB Posted October 25, 2011 Share Posted October 25, 2011 Some suggestions... my Paul Janssen's Macchi 202 flies great on HQ2.5/10 (root) and HQ2.5/12 (tip), and is a fantastic light to med/heavy wind soarer. I'd thoroughly recommend this section (all it lacks is inverted performance, which isn't that important on a PSS IMHO; others may disagree). Nearly all of Paul's other PSS designs use this section combination too - he also does a nice Spit Mk22/24. A fuse/canopy set is available for that one; just drop him an email (you can't have mine, it's finally near the top of the build queue!). Edited By MattyB on 25/10/2011 14:53:43Edited By MattyB on 25/10/2011 14:54:58 Quote Link to comment Share on other sites More sharing options...
Terence Lynock Posted October 27, 2011 Author Share Posted October 27, 2011 Always liked the look of the MC202 Folgore and the 205 Veltro, only thing that has put me off is the wing area being purebred fighters, I have sorted the plans for the F22 Spit today as I wasnt feeling too chipper so stayed at home. I used the Lockwood plans resized to dead on 1/10th scale 44.5'' span and changed the aerofoil to S3021 with 3deg incidence, the wing was foam so cleaned everything off the original drawing and used the outline to draw a built up wing which is much lighter. I may tweak it a little by adding an 80mm wide flat centre section and fit the finished wing panels to this, not pure scale I know but it will increase the wing area a little. Quote Link to comment Share on other sites More sharing options...
MattyB Posted October 28, 2011 Share Posted October 28, 2011 Posted by Terence Lynock on 27/10/2011 00:51:49: Always liked the look of the MC202 Folgore and the 205 Veltro, only thing that has put me off is the wing area being purebred fighters, I have sorted the plans for the F22 Spit today as I wasnt feeling too chipper so stayed at home. I used the Lockwood plans resized to dead on 1/10th scale 44.5'' span and changed the aerofoil to S3021 with 3deg incidence, the wing was foam so cleaned everything off the original drawing and used the outline to draw a built up wing which is much lighter. I may tweak it a little by adding an 80mm wide flat centre section and fit the finished wing panels to this, not pure scale I know but it will increase the wing area a little. All Janssen's designs are subtly tweaked to improve soaring performance, so I've not found it an issue - my Macchi (his original prototype) flies quite happily in 7-8mph off Ivinghoe Beacon in a westerly. Here it is flying on the Lleyn peninsula in 8-10mph. 3 degrees of incidence seem a lot to me though; I'd recommend rigging it with no more than 1, but all the PSS plans I own say to rig at zero-zero (you can always shim it up later after the test flights). The Janssen's designs also have no washout, which surprised me a bit initially but doesn't seem to be a problem when using the HQ sections. Finally I would not worry too much about the extra weight of a foam wing tbh; a brown papered or bagged wing will not be heavy enough to make a huge difference in my opinion, and will be much more reslient to slope abuse (remember S.L.O.P.E stands for smashed, lost or pulverised eventually!) Edited By MattyB on 28/10/2011 11:53:42 Edited By MattyB on 28/10/2011 12:02:59 Edited By MattyB on 28/10/2011 12:04:18Edited By MattyB on 28/10/2011 12:06:58 Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.