Using the Beta Range

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From: Marshall Michaelianby way of Marvin Kaye <marvkaye [at] olsusa.com> <73663.457 [at] compuserve.com>
Subject: Using the Beta Range
Date: Fri, 30 Oct 1998 18:48:22 -0500
To: <lancair.list [at] olsusa.com>

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Thanks Marv for the Legend referral.  I checked with Jeff Ackland who is

using a reversing prop on the turbine Legend.  He says that he rarely uses

the reversing prop for braking, and when he does, it is at higher speeds

right after touchdown (80 to 50).  The only tricky part is if the airflow

to the rudder is blanketed then directional control is touchy.  What he has

found that works extremely well is to put the prop into flat pitch upon

touchdown making act as a rotating drag chute.  Another Glasair II builder

has commented that his plane will decelerate from 200mph to under 100 mph

just by moving the his large 3 bladed prop into flat pitch.



Conclusion:  Reversing prop not necessary to feel good about going into a

2500 ft strip.  However a prop capable of going into flat pitch is very

desireable and will act as a large speed brake.



Marshall Michaelian (SQL, 75% LIV-P, Eagle 540 V8)