Perry Mick wrote:

Bill and Paul:

I like that Hartzell HC-C... prop picture you sent Paul.  I have the
book so I opened it to that page.  That prop is a 3 blade prop designed
for the C210.  I used the c/R numbers on page 110 to develop the chord
distribution, then scaled up slightly since we have two blades.  Scaled
up the max chord to what we were using: 7.2 inches.  I like this blade
profile, especially the straight leading edge.  Here are the new chord
numbers, don't know if they affect your airfoil choice at each station
Bill.

station chord
6       4.8
9       5.7
12      6.6
15      7.0
18      7.2
21      7.2
24      7.1
27      6.8
30      6.4
33      5.8
36      5.0
39      4.0

I guess one of these days we'll just have to shoot the engineer and
put this thing in production.

--
Perry Mick
perrym@teleport.com
Duckt N7XR
http://www.mickaircraft.com/duckt.htm

Shoot Bill? No way!! He is too valuable.

I suspect the prop Hartzel made for the Reno winning  LancAir IV
uses the same technology with perhaps thinner and wider blades.

Paul Lamar
 
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