Hi from Mark
I have used a bicycle disk brake with an indent in the idle position in the throttle.
Pull the throttle back to no power than flex it sideways and pull back till the prop stops.
It’s really pleasant gliding silently, no prop noise.
You don’t have to get that fancy but it is nice not having to make sure you unlock the prop before adding power.
I haven’t been doing this for 8 years now because people weren’t all that interested in gliding. And it could be problematic for any one not paying attention to the complexity that the brake would add to the system.
Happy Flying,
Mark
Sent from our iPhone
eGull: Mode
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earthstaraircraft
Re: eGull: Mode
You are doing experiments and research.
The manual needs to only discuss the simplified product of your work or no one will take the time to read it.
Happy Flying,
Mark
Sent from our iPhone
The manual needs to only discuss the simplified product of your work or no one will take the time to read it.
Happy Flying,
Mark
Sent from our iPhone
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earthstaraircraft
Re: eGull: Mode
You are allowed to 18,000 feet!
You are flying an ultralight, not a light sport!
Martin, I have taken your plane to 13,000 feet.
Happy Flying,
Mark
Sent from our iPhone
You are flying an ultralight, not a light sport!
Martin, I have taken your plane to 13,000 feet.
Happy Flying,
Mark
Sent from our iPhone
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earthstaraircraft
Re: eGull: Mode
The Zero Motorcycle dash gives the RPM!
Happy Flying,
Mark
Sent from our iPhone
Happy Flying,
Mark
Sent from our iPhone
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mkoxxy
Re: eGull: Mode
Right, Mark: publish only the major results and recommendations, but not
what we did to get there.
Soaring: even without a throttle indent, it should be relatively easy to
set power to 0 just by watching the Zero app display, right? The prop will
still spin and produce drag, but no power is going in or out.
My understanding at this point is:
Even if you go through zero power into full regen (ECO mode, or Custom mode
with high Max Regen), you may still have to reduce speed, maybe pull up,
for the prop to stop. But once stopped, it should take extra speed to
"break free" and start spinning again. Or throttle, of course.
When I practice "dead-stick landings" I always go to zero throttle (full
regen), but that rarely stops the prop. However, should I expect a
noticeable increase in drag when I *slowly* add power after balanced flight
with a stopped prop? I usually go from zero throttle directly to +2 or 3 kW
when my approach is too shallow, and I don't really notice any spike in
drag (which would not be good if you are already near stall speed in the
pattern).
This is all very safe with electric propulsion, even without a bunch of
altitude - we can be sure the motor will start again and produce all the
thrust we need instantly. I would be more hesitant to do this with an ICE,
especially a 2-stroke.
What happens when you turn the motor off (motor kill switch) while in
flight?
what we did to get there.
Soaring: even without a throttle indent, it should be relatively easy to
set power to 0 just by watching the Zero app display, right? The prop will
still spin and produce drag, but no power is going in or out.
My understanding at this point is:
Even if you go through zero power into full regen (ECO mode, or Custom mode
with high Max Regen), you may still have to reduce speed, maybe pull up,
for the prop to stop. But once stopped, it should take extra speed to
"break free" and start spinning again. Or throttle, of course.
When I practice "dead-stick landings" I always go to zero throttle (full
regen), but that rarely stops the prop. However, should I expect a
noticeable increase in drag when I *slowly* add power after balanced flight
with a stopped prop? I usually go from zero throttle directly to +2 or 3 kW
when my approach is too shallow, and I don't really notice any spike in
drag (which would not be good if you are already near stall speed in the
pattern).
This is all very safe with electric propulsion, even without a bunch of
altitude - we can be sure the motor will start again and produce all the
thrust we need instantly. I would be more hesitant to do this with an ICE,
especially a 2-stroke.
What happens when you turn the motor off (motor kill switch) while in
flight?
-
mkoxxy
Re: eGull: Mode
I'd like to pick this subject up again. I think we all agree now that best
glide requires the prop to be stopped (fixed pitch). But how does one stop
the prop? The other day, I was trying to stop it while gliding, but no
matter which mode (regen or not) and how slow, it kept spinning. Mark, were
you suggesting an actual disk brake on the prop shaft? There must be a
better way. The motorcycle has brakes, but until the brake pads actually
engage, most braking is done by the motor (regen). Can we use that feature
somehow?
In my Bolt EV, in "L" (high regen) mode, I can bring the vehicle to a stop
without touching the brake (but then it creeps forward on a downhill).
I hope everybody is safe and healthy. I'm sure glad to be able to go fly
and forget the pandemic for an hour, but I miss camping and socializing.
glide requires the prop to be stopped (fixed pitch). But how does one stop
the prop? The other day, I was trying to stop it while gliding, but no
matter which mode (regen or not) and how slow, it kept spinning. Mark, were
you suggesting an actual disk brake on the prop shaft? There must be a
better way. The motorcycle has brakes, but until the brake pads actually
engage, most braking is done by the motor (regen). Can we use that feature
somehow?
In my Bolt EV, in "L" (high regen) mode, I can bring the vehicle to a stop
without touching the brake (but then it creeps forward on a downhill).
I hope everybody is safe and healthy. I'm sure glad to be able to go fly
and forget the pandemic for an hour, but I miss camping and socializing.