"Capt. Geoffrey Thorpe" The Sea Hawk @See My Sig.com wrote in message
...
"MP" wrote in message
...
To clarify, I'm not shortening the blade. Here's the plan in pictures.

This photo shows the Q-tip as it is now.

http://img13.imageshack.us/img13/6228/qtipbefore.jpg

This photo shows what I'd like to do.

http://img17.imageshack.us/img17/9960/qtipafter.jpg

Naturally, I'd radius the tip better... this was just a quick
"photo-shop"

Again, the idea is to "shear" the blade tip much like a sheared wing
tip.

Anyone seeing anything horribly wrong with trying this?


Removing weight from the tip will change the blades natural resonant
frequencies.

The less metal you remove, the less you are going to change them, but do
you know how much room you have between the engine firing order
frequencies and the current resonant frequencies of the prop?

I see a fair amount of risk for not much (if any) gain.


Oh - forgot to mention - if you do decide to hack at the prop, it would be
a good idea to install a "chicken strap" between the engine and airframe
just in case things do go wrong and you break the motor mount. Eh?

--
Geoff
The Sea Hawk at Wow Way d0t Com
remove spaces and make the obvious substitutions to reply by mail
When immigration is outlawed, only outlaws will immigrate.