[NSRCA-discussion] Down Thrust vs Wing

[J N Hiller]

In the field I just pulled the spinner cone and hold the Robart head against
the spinner back plate. The side of the measuring head is quite square to
the bar and the prop can be left on.
Jim Hiller

-----Original Message-----
From: nsrca-discussion-bounces at lists.nsrca.org
[mailto:nsrca-discussion-bounces at lists.nsrca.org]On Behalf Of Nat Penton
Sent: Sunday, March 16, 2008 4:10 PM
To: NSRCA Mailing List
Subject: [NSRCA-discussion] Down Thrust vs Wing

Keith
An easy way to measure thrust line relative to wing is to bend an L shaped
piece  out of aluminum strap to attach to the motor. The plane does not need
to be level to measure. Use a Sullivan and/or a Robart meter to measure the
wing incidence, then "sit" on top of the prop bracket and measure the down
thrust.

The horizontal leg on the prop bracket only needs to be 4 to 6" long for the
meter to sit on. The meter can be held in place with a rubber band if
needed.

Brilliant ! LOL                                  Nat
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