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dave.thompson(at)verizon.
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 Posted: Thu Sep 07, 2006 10:23 am Post subject: throttle - Vernier |
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Here’s a story that you might consider:
In the late 80’s my father, brother & I built a single seat Quickie. We installed a vernier throttle in it. She came up to speed very fast on the takeoff roll but at first you really had to be quick with your feet to keep the nose straight. After three successful flights, my father’s friend from WWII came out to see it. He was a colonel in SAC, flying B52’s then, B17’s during WWII. He also had a Navion and a Cub. Due to the fact that he had so many hours in a variety of airframes, my father allowed the Colonel to fly the Quickie after a quick briefing. During the briefing, the colonel was shown that the button on the vernier throttle had to be pushed in order to move it.
The Colonel taxied out. When he applied full takeoff power, the tail began to yaw, as usual. He over compensated several times and then tried to pull the throttle back to idle. He forgot to push the button. In his “panic??” he jerked the throttle and broke it out of the fiberglass panel. At the same time, he went off the runway into the grass. One wheel (the mains were on the wingtips) stuck in the mud, she ground looped and ended up upside down. He was not hurt. It took us 6-months of work to get her airworthy again. When she flew again she had a standard throttle control installed in the new reinforced panel.
The moral to the story:
Vernier throttles are very cool! However, they do not use standard control input which could cause problems in an emergency.
I’m not condemning vernier throttle controls, just sharing a story so you can make your own decision.
Note: The enclosed picture was before we installed plackarding.
Dave Thompson
dave.thompson(at)verizon.net (dave.thompson(at)verizon.net)
Westminster, CA
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dasduck(at)comcast.net
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| Posted: Thu Sep 07, 2006 12:54 pm Post subject: throttle - Vernier |
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I had a vernier in my plane for several hundred hours, I liked the easy adjustment for small changes. It was an issue sometimes during landings.
When I began flying a lot of formation, it became a real issue, so I grudgingly converted to std push-pull with the adjustable friction lock.
I have to say that ALL things considered, after several hundred hours of both configurations in the SAME plane, I would give preference to the push-pull.
At least my vernier was the type that I could remove a bit of the mechanism and ‘easily’ convert to push-pull.
dw
From: owner-zenith-list-server(at)matronics.com [mailto:owner-zenith-list-server(at)matronics.com] On Behalf Of Dave Thompson
Sent: Thursday, September 07, 2006 11:23 AM
To: zenith-list(at)matronics.com
Subject: RE: throttle - Vernier
Here’s a story that you might consider:
In the late 80’s my father, brother & I built a single seat Quickie. We installed a vernier throttle in it. She came up to speed very fast on the takeoff roll but at first you really had to be quick with your feet to keep the nose straight. After three successful flights, my father’s friend from WWII came out to see it. He was a colonel in SAC, flying B52’s then, B17’s during WWII. He also had a Navion and a Cub. Due to the fact that he had so many hours in a variety of airframes, my father allowed the Colonel to fly the Quickie after a quick briefing. During the briefing, the colonel was shown that the button on the vernier throttle had to be pushed in order to move it.
The Colonel taxied out. When he applied full takeoff power, the tail began to yaw, as usual. He over compensated several times and then tried to pull the throttle back to idle. He forgot to push the button. In his “panic??” he jerked the throttle and broke it out of the fiberglass panel. At the same time, he went off the runway into the grass. One wheel (the mains were on the wingtips) stuck in the mud, she ground looped and ended up upside down. He was not hurt. It took us 6-months of work to get her airworthy again. When she flew again she had a standard throttle control installed in the new reinforced panel.
The moral to the story:
Vernier throttles are very cool! However, they do not use standard control input which could cause problems in an emergency.
I’m not condemning vernier throttle controls, just sharing a story so you can make your own decision.
Note: The enclosed picture was before we installed plackarding.
Dave Thompson
dave.thompson(at)verizon.net (dave.thompson(at)verizon.net)
Westminster, CA
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9/7/2006
--
9/7/2006
[quote][b]
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marinegunner(at)gmail.com
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| Posted: Thu Sep 07, 2006 5:34 pm Post subject: throttle - Vernier |
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I use a verneer throttle on a fire truck every day that I work. It is
a great throttle and I am very used to it. However, it is backwards
when compaired to a traditional aircraft push pull throttle with
friction lock. And, it is forever causing a problem because it gets
either loose or stuck and one cannot properly operate engine. This on
a pretty new 2003 fire truck, and it has been happening ever since
truck was purchased. Same thing on most other fire trucks that I have
used with this type throttle. One can almost always fix the throttle,
but would hate to attempt to do so while flying.
My CH 600 has a traditional push-pull with simple friction lock, seems
to always work. I think there is a reason for common aircraft
throttles, they work and work well. I would not have something else on
my airplane.
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Semper Fi,
Steven R. Hulland
CH 600 Taildragger
Amado, AZ
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