Gliders > Slope Soaring
I'm drowning, in bits of an Mu28
gerryb:
hi keith,
the blue and orange lines in your sketch show exactly what you don't want-humps. gentle sanding rather than 'all guns blazing' will bring down the filler to the profile you need.
as you sand down the filler, use a straight edge laid across the wing/filler/wing. as you begin, you will see daylight underneath the straight edge. as work progresses and the filler goes down, you will see less and less of a gap underneath the straight edge until finally the edge will roll across the wing in a smooth movement without any homps , bumps or hollows.
don't forget you will be veneering the wing with obechi and that will also help to maintain the curve.
re the spar itself, the most important part of it is the vertical part between top and bottom carbon pieces. on a 4m wing, please do not leave this piece out. it is carrying most of the loads and stresses and will strengthen your wing way more than if you leave it out.
Happy Days:
Okay Ger,….I’m still not totally sure that I’m gonna be able to get the profile dead right, but then, as I was told once by a wise man, “Precision engineering is a question of compromise!” :roll:
If it goes wrong I’ll blame you. :P
BTW just as an aside………I was up on Mt’ Lienster today. Great conditions, warm breeze, broken cloud, plenty of lift. :D
Anyway, I nearly managed a vertical ‘8’ The Alpina has much better energy retention than the other planes I’ve got.
What I’m lacking at the moment is balls! :oops:
K.
gerryb:
hi keith, you jammy dodger!!!!! sounds like you had a right good day's flying. we were on tountinna tonight and if it wasn't raining, it was covered in cloud and a howling gale for good measure. still, we got some flying, but not enough to satiate the fagacites.
re the attainment of perfection vis-a-vis wing sections......it's what we all strive for but somewhere along the line we have to say 'that's fine'. otherwise, we would never get anything finished and into the air. as another wise man said, (a frenchman as it happens) "we are weekend flyers". so i suggest you work out a plan of action, get yourself set up on the work bench, and take the plunge. as the nike add says 'just do it'. you'll be glad you did. :D :D
Happy Days:
I have no idea what “fagacites” means. :? (Personally I think you’re just showing off with all these strange words!)
As for ‘just doing it’ I guess you’re right, although I can see myself producing one wing half with one profile, and the other wing half with a slightly different one. The plane will probably end up flying round in circles. :roll:
(But then they do say, “One good turn deserves another” :lol: ……………Okay,….I‘m going :P …)
Fred:
AAhhh Keith! Good to see that you started the Mu! :clap:
For the wing, don't bother too much!
Cut the groove, put your carbone tape, use a bit of light (polyfilla) filler, and off you go!
I can guarantee that you will not see any difference in the way the glider is flying.
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