Rendegade

Whats the reasoning for having a "laminar" section on the osmose? WHen I say that I mean having the widest section of the airfoil at approximately 50% of the chord.

I understand the thick trailing edge, but this different airfoil does make me ge "huh?"

Any input would be appreciated.

j payne

It is not a true laminar flow section but one of the modified "naca" sections nothing new about it I have been using it for about 8 years
the high point is at 42% of the cord a lot of the Europeans have been using it for a long time
John

Rendegade

What's the reasoning behind going for this airfoil?

xcead

the reason of laminar airfoils, is that the wing always has laminar flow over the all surface. the wing can fly faster, and at higher AoA and the flow will always stay laminar, or most of the time...

as the flow reaches high speed in the widest section, and the drag decreases the speed of the flow, causes it to separate itself from the wing, if the widest section is closer to the trailing edge, the turbulent flow that may appear, will stay little time over the surface of the wing

less drag ,less turbulence, and most important the wing generates more lift in all its surface

im sorry if my english is turbulent...

if anyone has other opinion, let us know!!

Alex Voicu

Can someone please explain the reason for the thick trailing edge?

Rendegade

I don't think lift is the issue as the aircraft has more than enough wing area, and it's not about less drag either in this case. Don't forget we're talking about F3A here, not a P-51 mustang. The speeds are low and constant speed flying is the game, the use of a laminar airfoil in this instance seems to be counterproductive.

Also having too much lift at the wrong time is as bad as having not enough.

But hey, what do I know.

David Bathe

And hey, their are quite a few people using CPLR planes... but with different, personalised wings.
Most with a thiner airfoil at the tip.
And thats just the wings. I know some that have also produced the own, thinner stab.
He fly what he likes. Doesn't mean you'll like it.
Infact, judging by the comments here in Norway, most tend to prefer the modified versions.
That make life simpler doesn't it.[sm=50_50.gif]

apereira

The thick trailing edge creates a small vacum that tends to pull from the T.E. and this helps to slows the airplane down.

Regards

Rendegade

David, yes it does.

It does start to raise the question of what works best.