wingtip rules?

[Ededge2002]

Just a feeler post asking for opinions if there is a wingtip rule of thumb?

Ie could I:

Add a little additional span direction to an existing approved wing to provide a little more of a tapered tip?

If you have the 180sq" and 10% requirement covered is there a maximum tip size that could be added?  Example could I add 1.5" per side and make my own wingtips that have a better less drag performance and experiment? 

Yes @sihinch be afraid be very afraid!

[sihinch]

"The airflow around winglets is complicated, and winglets have to be carefully designed and tested for each aircraft."

You could mess it up Ed!

[battlestu]

You could mess it up Ed!

yep he's worried ... i would love to see what happens

[bfeist]

Nothing like a good technology arms race to make racing more interesting.

[Papa]

The old standard for any rule in any racing.
If it's not barred then its legal.


However!


Remember the rule.


Rule #2.         Wing thickness must be a minimum of
                      10% of local chord at any span wise location.

That includes wing tips. So design carefully!!!!

Jack.

[Andy Hoffer]

The old standard for any rule in any racing.
If it's not barred then its legal.

However!

Remember the rule.

Rule #2.         Wing thickness must be a minimum of
                     10% of local chord at any span wise location.

That includes wing tips. So design carefully!!!!

Jack.

I think use of the word "wise" in this discussion constitutes an oxymoron.   

[battlestu]

we all know what you are thinking about.... how can put skis on mine

[piker]

My opinion is that anything additional beyond the minimum span and minimum thickness should be allowed. 

I think the "at any span wise location" modifier is a good one but should only apply to the area of the wing that makes it meet the basic rules.   

As much as I don't want to see Ed with any additional advantage, I don't see the harm in allowing some experimentation.  Besides, if he comes out with something that improves the design, we'll all just copy it for the next race 

[Papa]

the area of the wing that makes it meet the basic rules. 

And what would that area be @piker ?


jack.

[piker]

180 sq.in.

But your call.  You're the CD... and I'm happy with you being the bad cop 

[Ededge2002]

I'm glad that my description is understood. I also feel that so long as the minimum area qualifies (180sq") with the required 10% thickness additional area should not have to meet the requirements. Racing is about research and improving on an existing design. ...and trying not to have to cheat to do it lol

Is there anyone that is against my idea that would curb me from doing this testing?

[sihinch]

Yes! Me!!!!

[wollins]

Is there anyone that is against my idea that would curb me from doing this testing?

I could care less what anyone else does with their plane ... I'm gonna beat all comers going forward cause I just switched out my Nooner's motor with this new racing motor!  (Last I recalled there was no upper weight limit in the rules! lol)

Colin   

[sihinch]

Yes! Me!!!!

I was kidding!

Colin - where will you put the battery to get the CG?

[Ededge2002]

" Colin - where will you put the battery to get the CG?"

I suspect on a string hanging behind the plane!!