Okay here is a question for the brain trust.
My (airplane's) best rate of climb is about 70mph and cruise is around 95-100.
If climbing to 6-7000+ ft what do you guys do? Climb at best rate or speed up slightly? I've been climbing at best rate then speeding up until my RPM is at max power. If warm I will speed up until I have enough cooling to sustain a long climb.
-Alan Cossitt
>From my iPhone. Please excuse typos and terseness.
503.816.5930
Cruise climb speeds
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cossitt.alan
Re: Cruise climb speeds
Oh yes. I stay at full power during the climb (2-cycle).
-Alan Cossitt
>From my iPhone. Please excuse typos and terseness.
-Alan Cossitt
>From my iPhone. Please excuse typos and terseness.
-
dickoreilly
Re: Cruise climb speeds
What the FAA expects to see is 500 FPM climbs and descents from single engine
GA planes. Low powered planes like my old Cherokee 140 can't quite do 500 FPM
above 6-7,000 and the controllers know that, if you're talking to them on a
cross-country for flight following, which is a good idea. I think the Gull can
do it pretty easily, but I'm not sure to what altitude it can keep up the pace.
As long as you're climbing at 6000 rpm or full throttle (503 - not sure what it
is in HKS) and temps are normal, it really doesn't matter how fast you climb.
The most economical climb, I think, is cruise climb, which is faster than best
rate climb. We have a tremendous advantage in our Gulls because forward
visibility is not impaired when we climb steeply like it is in a GA plane.
Dick O'Reilly
GA planes. Low powered planes like my old Cherokee 140 can't quite do 500 FPM
above 6-7,000 and the controllers know that, if you're talking to them on a
cross-country for flight following, which is a good idea. I think the Gull can
do it pretty easily, but I'm not sure to what altitude it can keep up the pace.
As long as you're climbing at 6000 rpm or full throttle (503 - not sure what it
is in HKS) and temps are normal, it really doesn't matter how fast you climb.
The most economical climb, I think, is cruise climb, which is faster than best
rate climb. We have a tremendous advantage in our Gulls because forward
visibility is not impaired when we climb steeply like it is in a GA plane.
Dick O'Reilly
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earthstaraircraft
Re: Cruise climb speeds
In a message dated 5/6/2011 7:40:04 PM Pacific Daylight Time,
alan.cossitt@frontier.com writes:
Okay here is a question for the brain trust.
My (airplane's) best rate of climb is about 70mph and cruise is around
95-100.
If climbing to 6-7000+ ft what do you guys do? Climb at best rate or speed
up slightly? I've been climbing at best rate then speeding up until my RPM
is at max power. If warm I will speed up until I have enough cooling to
sustain a long climb.
-Alan Cossitt
>From my iPhone. Please excuse typos and terseness.
503.816.5930
I Like to climb at 80 for cruse climb unless I need to get to altitude
faster.
With the 503 it doesn't really mater what speed you climb at since it has a
fan.
Happy Flying
Mark
alan.cossitt@frontier.com writes:
Okay here is a question for the brain trust.
My (airplane's) best rate of climb is about 70mph and cruise is around
95-100.
If climbing to 6-7000+ ft what do you guys do? Climb at best rate or speed
up slightly? I've been climbing at best rate then speeding up until my RPM
is at max power. If warm I will speed up until I have enough cooling to
sustain a long climb.
-Alan Cossitt
>From my iPhone. Please excuse typos and terseness.
503.816.5930
I Like to climb at 80 for cruse climb unless I need to get to altitude
faster.
With the 503 it doesn't really mater what speed you climb at since it has a
fan.
Happy Flying
Mark
-
cossitt.alan
Re: Cruise climb speeds
thx mark, I 80 mph is about where I have been cruise climbing (70 knots). I
get about 4750 rpm (3701 water cooled hirth) at best climb and then speed up
until I get to 4850 RPM (max HP) and stay there. I'm still climbing 800+
fpm at that speed. When it gets hot the extra speed helps keep my water
temps down though my engine is overcooled (on purpose so I can climb at best
angle on 100 degree days).
_____
get about 4750 rpm (3701 water cooled hirth) at best climb and then speed up
until I get to 4850 RPM (max HP) and stay there. I'm still climbing 800+
fpm at that speed. When it gets hot the extra speed helps keep my water
temps down though my engine is overcooled (on purpose so I can climb at best
angle on 100 degree days).
_____
-
blaswichk
Re: Cruise climb speeds
If going that high, I cruise climb at 85-90mph, and 600-700fpm. it takes a little longer, but the engine isn't working as hard. All that is assuming I have time and distance to my target altitude.
kb
kb
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cossitt.alan
Re: Cruise climb speeds
Kess, can't remember if you have a 2 or 4 cycle. So it sounds like you cut
back from full power on a long climb.
-Alan
_____
back from full power on a long climb.
-Alan
_____
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blaswichk
Re: Cruise climb speeds
It is the 503. I just like to run less than full throttle when I can, because the fuel flow is less. My EIS has the fuel flow option, and at full throttle I'm seeing 7gph. At cruise climbs and 5800-5900rpm, not full throttle, I can see 5gph. I suppose in hot climates and more altitude, my numbers would be different.
kb
kb