jhstarn(at)verizon.net
Guest
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 Posted: Mon May 12, 2008 5:25 pm Post subject: Gearleg fairings, help or hinder ? |
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It's been more that 5 years ago what Gummibear & I flew a just completed HRII (N561FS) without paint, gear legs/ wheel pants. We put together the operational numbers for the HRII at that point in time. Later we installed the gear leg farings & wheel pants and ran another set of operational numbers. VERY much to our suprize, (we had heard & dismissed as so much "talk") a gain of 5 MPH in level speed and a decrease of the stall speed of 5 MPH too (55 to 50). After much conversation with area notables we believe that the fairings smooths the air flow for a speed increase & less turbulent air flow under the wings in a pre-stall configuration. We tired to get a true full power, clean stall with 30 degree nose high but quit passing thru 14,700. Someplace UP there the HRII will stall but without oxy we saw no good reason to push the issue. Besides N561FS is AOA equipted if we need indications above 15,000' KABONG
| Quote: | From: Chris Fordham <fconsult(at)telus.net>
Date: 2008/05/09 Fri AM 10:00:49 CDT
To: rocket-list(at)matronics.com
Subject: Gearleg fairings?
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| Quote: |
Hey Fellas
I've been flying my Harmon Rocket for a grand total of 5 hours now
and all was going well until I put on the gearleg fairings and wheelpants.
When I first flew it without the fibreglass bits she would pull to the left
ever so slightly at full throttle and require very light right rudder to
keep the ball centered.
Now with the fairings and pants installed the ball is to the right about 3
ball widths and requires quite a lot of right rudder pressure to keep the
ball centered.. I removed the wheelpants last night and flew it like that
with no improvement, so I guess I have the gearleg fairings creating
drag.Now my question is would it be the port (left) fairing creating the
drag and the right one would be OK. or could they both be out. My theory is
that they are mini airfoils and both could be creating pressure and trying
to turn the ship around the center point. They look to be in line if you
just eyeball them, and I was very careful (I thought) in aligning them with
the airflow when installed, but the best laid plans and all that. I sure
don't want to make another set of intersection fairings.Anyone have this
problem? any suggested fixes?
Thanks
Chris F
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