Marc Freullet
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This is an easy question Im sure for you flat field soarer persons. I have got my eye on a 50 foot continuouse length of amber latex surgical tubing for bungee launching 3 to 3.6 meter gliders, the OD is 7/16 the ID is 1/4 with a wall thickness of 1/32, Will this be adiquate for the job ie too weak or too strong not long enough etc. Many thanks Marc.
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Will This fly?
Marc Freullet replied to Marc Freullet's topic in Gliders and Gliding - General Discussion
Posted by Dave Bran on 25/09/2012 15:16:40: Marc, Strictly, that is not a Delta!! Yes your right. I didnt use the correct terminolagy I meant a sweapt back wing of course. thanks for the correction -
Will This fly?
Marc Freullet replied to Marc Freullet's topic in Gliders and Gliding - General Discussion
Posted by Biggles' Elder Brother - Moderator on 25/09/2012 14:40:18: I'd be wary of mixing rudder with the ailerons in the Tx until you've had a feel of how she flies. This set-up can show strong tendancies to "tuck in" in the turns I can see your point. i think that,when a turn is initiated with ailerons & rudder & with no adverse yaw, in the roll the rudder will tend to yaw the nose about the normal axis perpendicular to the longditudinal axis ie nose towards the ground "tuck in" in this instance I can see that a little adverse yaw can be benificial. -
Will This fly?
Marc Freullet replied to Marc Freullet's topic in Gliders and Gliding - General Discussion
Hi & thanks I havent built in any reflex into the wings & at the moment the elevons are rigged neutral so on your advice I will give them a couple of degrees nose up trim even if this is not required its probably best to have it pitch up rather than down on the test launch I guess & trim it from there. I deliberated on weather or not to incorperate a rudder, I know that Delta wing shapes such as this suffer from adverse yaw unless differential aileron is applied ie more up than down, so Im hoping that the rudder will help here in the turn ie counteract the adverse yaw. What are your thoughts on this? Again the elevons are rigged at the moment for equal throw on aileron input. -
Hi all you Aerodynamicists. Just built this, Its my own design & scratch built. A few of my own theories have gone into the design. but it has not test flown yet &would like to know what your thoughts are on what flying charictoristics it may posess & any thoughts on set up etc the wing section is nothing spacific, but is semi or very nearly symetrical.
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Tim, thats not a bad idea, but will i get more than £85 + P&P,(Cost of new kit) thats the question I suppose. Ill reserve for the price of a new kit & see if it sells, nothing to lose I suppose. will give it a go. Cheers.
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OMG! was up in the loft clearing out some old junk & in true Indiana Jones style clearing the cobwebs & avoiding the giant (they really were) spiders, & after moving a mountain of junk came across a long thin box. What could this be? I really had no idea. got it down & into the daylight wiped at least 1/2inch of dust off the lid & low & behold a David Boddington Cyrrus Moth kit I had completely forgotten about. This it is about 20 years old & is 48" span for .15 to.20 engines. I bought it at a model show somewhare with loads of other stuff and its never been opend untill now. The plan is now vintige yellow in colour & instructions looked hand typed the wood has gone a deep yellow cream colour too. Does balsa improve or deteriate with age? it all looks in pretty good nick.What next? when I get a chance may build this into an electric version or maybe I should build it as it was meant to be? or maybe Ill put it back in the loft for another 20 years, who knows.
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Thanks very much for the reply really appreciate it. I would be very greatfull if you could post the build artical & plan it may just give me a heads up on any problem areas. Iv updated my profile with address details Thanks . The built up wings on the plan are 3.6 meters I think, more than adiquate. I do intend to build in Spoilerons . Im glad you say it flys nicely with such a heavy fuselarge because I was intending to cover mine with LW glass cloth & may well be lighter than the GRP version anyway. the towhook on the plan looks as if it could move forward a tad in relation to the C of G but I was going to mount the towhook in a slightly different way to that suggested so can experiment with this. Though Im not intending to put a full on build log on here Il post a few pics from time to time on the progress. many thanks once again. Marc.
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Just embarked on a Thermik Prowler build. I cant find much info on the net about this one so does anybody know anything about it? I have had the plans for some time & I havnt had a large wingspan thermal soarer for some time so Im really looking forward to this project. The plans show a GRP fuselarge with a T tail & also a built up wood fuselarge with convetional all moving tail, apart from the fact the GRP fuse is probably no longer available(corect me if Im wrong) I shall be opting for the latter as I like a good build & IMO the tail arangement looks better. Has anybody built,bought borrowed or flown this model? interested in any info.
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Thanks for that Mark I was wondering about the crackle issue ill try a test piece first otherwise dope it is. Cheers.
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Thanks The wings are my own cut foam veneer covered in Pearl purple Oracover I had going spare I agree varnish on its own would look good in certain situations but i dont think it would go with the wing covering Ill try & get some pics on here soon
