flyrotary@lancaironline.net Mailing List Archive

Jeff,

At this point I have only 3 hr of flight time on the gearbox with the modified drain and vent. I have not observed a significant effect with respect to power absorption or heat generation.

Connecting the vent line to the foot of the rotor housing was ineffective even though this location was above the oil level. Connecting the vent line to the area of the oil filler opening at the top of the center iron allowed the gearbox to drain as intended.

The most troublesome part of the modification was enlarging the oil return to 1/2" NPT in the rotor housing foot.

Steve Boese

From: Rotary motors in aircraft <flyrotary@lancaironline.net> on behalf of Jeff Whaley jwhaley@datacast.com <flyrotary@lancaironline.net>
Sent: Monday, May 6, 2019 11:27:44 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Venting the Reduction Drive

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A couple months back, Steve Boese posted about oil volume in the reduction drive unvented Vs vented but also stated that he had not flown with the modification.
So Steve have you or anyone else accumulated any flight-hours with a "vented" reduction drive?
I was planning to do that with this return of warm weather but would appreciate a voice of experience prior to making the modification.
Thanks ... Jeff

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