Subject: [FlyRotary] Re: Temps finally down

 

Sounds like you are closing on the solution, Steve, congratulations.  Its

always nice when you get to the point where you can fly without one eye on

the temps.

 

 The boundary layer (particularly with coolers to the rear of an airframe)

appears to play a big role.  The layer increases in depth as you go rearward

and it creates havoc with the operation of cooling ducts and diffusers.

 

 Great, Steve. Glad to hear you have that issue resolved.

 

 For anyone interested, attached is a little DOS program that computes boundary layer thickness.  Input fuselage length, distance from nose to scoop entrance, and aircraft speed.  Of course since it is an executable program, virus filter may take out the attachment.  If so, you can send me your data, and I'll do the calc for you.  I’ll Zip it, and it may should go through.

 

 

Al