Brant
It's my understanding that larger diameter props are pretty much always more efficient than smaller ones. Your P/D ratio is now approaching 2:1. If you're getting good times with your pitch that high then your models must be flying well. I've done best with pitches in the range of 15 but I would guess you've already tried that.
----- Original Message -----
From: brantfredrickson
To: Indoor_Construction_at_yahoogroups.com
Sent: Monday, January 28, 2008 8:48 AM
Subject: [Indoor_Construction] 2008 Div C SO
We had some models from last year where we changed the prop dia from
~7.24 to ~9.5 inches. We moved the pitch from ~12 to ~18 inches and
moved the rubber width from .85 to .112 inches. Our times in the same
22 ft gym have gone up about 10%.
I am amazed that we don't run out of turns with the wider rubber. I'm
having difficulty understanding why out models work so much better
with the higher pitch and wider rubber. Anyone want to offer an
explaination?
[Non-text portions of this message have been removed]
Received on Mon Jan 28 2008 - 06:16:54 CET
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