by Bob Cowell <bobc@[EMAIL PROTECTED]
>
Jul 2, 2008 at 10:41 AM
On Mon, 30 Jun 2008 15:36:13 -0600, Robert Reynolds <robbie@[EMAIL PROTECTED]
>
wrote:
>I posted a couple of new articles on my website at
>www.balsaworkbench.com. One of them involves propeller guides for 2
>stroke and 4 stroke engines. I don't know the original source for these
>charts, and I don't have a lot of experience with engines larger than a
>.91 four stroke. I welcome any suggestions or corrections that might
>improve the usefulness of the charts.
>
>Robbie
Your charts look pretty "normal" to me ;-)
I would add a disclaimer that props from different manufacturers vary
widely in
their performance.
THE single BEST 16x8 I ever laid hands on was an ancient "RevUp"
I have been buying and trying different brands and styles ever since I
broke it.
For the .40 size, PLAIN BEARING ENGINE, a 10x5 APC seems to be a pretty
good
match for those big draggy trainers.
for the .91 size four strokes, a nice 13x8 or 13x9 gives more speed
{for those who like more speed ;-) }
without lugging or losing too much in the low speed thrust department.
My OPINIONS
YMMV
bob
