snips..
I understand how they work. Our leaning cable moves rapidly
from one end to the other three inches away just like the throttle
cable. Making the needle the same length means we can make gross
adjustments rapidly from full off to full on and fine adjustments
with the vernier. The leaning cable knob has a button on it. You
push and hold the button in to release the vernier and make the
gross adjustment. Release the button and then the vernier works
again. I have one on my C182. Next time you are in the states
flying around rent a Cessna with a vernier knob instead of flying
your C150 or stop by my hangar :)
Paul Lamar ...No rotor no motor.
Doug,
What about this? This is a true needle valve from Parker. The graph
showing flow looks very linear.
The only thing with this valve is it adjusts by turning, so you
would have to have a cable that works by turning not push-pull.
Nothing wrong with this approach.
An ideal valve would be this but with a quarter turn lever, but
there does not appear to be such an animal in existence.
I still think that Swaglok valve might work. True, it's meant for
quick opening, but it's still a needle valve. If that pin is lifted
up a little at a time, the flow increase should be linear. It looks
pretty much the same as the Parker valve in cutaway.
The only thing is you would have to replace that Nylon lever with a
metal lever so you can hook up your Vernier cable.
Regards,
Gordon.
Gordon
Yep, Parker is another good company. That should work.
Doug
What do you guys have against this idea? What is wrong
with it?
Paul Lamar
Not a thing. I see no reason it won't work. And work well...
Steve Webre
Broussard LA
N3812V
Paul
It will be too expensive:) Seriously... basically it sounds like you are
saying you have made a better way to do it then those people who's
livelihood depend on making a quality product. Excuse me but mentioning
'cheap' or 'cheaper way to do it often turns out to be a very expensive
way. In prototyping products that need to be promoted as safe, reliable and
of aviation standard 'as cheap as possible' goes counter culture to the GA
community. Those words conjure up the image of someone tying a automobile
brake light socket to the tail of his plane to be used as a navigation
light, or displaying an engine compartment that looks like a rats' nest of
wires. "No thank you" is the response.
Everyone is for making something less expensive. It is good for business,
the environment, and usually creates a more efficient design. You made an
excellent start with the slide throttle, which my no means is a tested item
even now. Flying with ideas that are fresh off the paper is not a good for
people's longevity or the future of the rotary movement.
Time is not cheap either and many good ideas are waiting to be proven or
discarded. Introducing of an off-the-shelf needle valve was a good way to do
a bench test on your sealing issues and throttle port injection ideas. When
that is assured then you can design a custom needle valve if you still need
one. You are a busy guy so let one of interested members step forward to
make the idea, and set up a verifiable test program so the results can be
duplicated.
The custom metering valve is a slide throttle fuel injection dependent
concept.
With all due respect
DougFir
"Seriously... basically it sounds like you are
saying you have made a better way to do it then those people who's
livelihood depend on making a quality product."
That is not what I am saying. I have not found anything yet
off the shelf that is suitable for the simple low pressure
combination slide throttle and fuel injection. I have no
idea what you have in mind but that is what I am focused on.
"The custom metering valve is a slide throttle fuel injection
dependent concept."
Absolutely. Implied in that; it is optimized for that use.
I have no intention for making needle valves for the general
purpose market. They would not find this design useful anyway.
This is the latest, thanks to Colin Smith and it is perfect for
my use. Super simple with extremely low technical risk.
It also works just like a Cessna leaning valve.
Paul Lamar ...No rotor no motor.
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