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Wattaplane/Skywing 48" EPP/PLY hybrid Slick

gyro

gyro

GSN Contributor
rcguy1958 said:
I changed my tail wheel also, it had the tail sitting too low for harrier landings. My buddy had a tail wheel from a hanger 9 extra laying around that I used. Simple setup, Aluminum bracket, bent music wire and a nice fat 1" wheel. didn't change the cg at all.
I've got 9 flights total on mine, CG is on the money, perfectly neutral, all trimmed out for hands off upright and inverted, knife edge mixes all set ( not much in the way of mixes, only needed to add aileron to left rudder knife edge, right rudder just needed a little elevator)
I seem to have a small , I guess, "flat spot" in my throttle. It seems that between zero and 1/4 throttle there is very little response. My throttle calibration was done correctly, I tried increasing the timing, helped a little but it's still there. Would adjusting the frequency of the esc help this ? ( sunnysky 2820-950, ZTW "a" series 50 amp esc )
I also tried going to a 13X6.5 from a 14X7, slowed the flight speed down a little but didn't really make a change to the problem .

BTW added new pics of the 55" yak ( first color scheme) to that thread
Click to expand...

I use an " idle up" on my air planes, and that helps with the punch the from low end. I basically set a switch to the trottle, and use it to keep the prop spinning at a low rpm when flying.
This cuts out the time the ESC spends trying to get back in sync with the motor.
 
Diggity

Diggity

70cc twin V2
25+ flights on the Slick and still hucking hard. The Sunny Sky motor on a 14x7 prop has proven very well so far. Bearings still holding up.. I'm thoroughly enjoying this bird!
 
wedoitall

wedoitall

Member
Diggity24 said:
25+ flights on the Slick and still hucking hard. The Sunny Sky motor on a 14x7 prop has proven very well so far. Bearings still holding up.. I'm thoroughly enjoying this bird!
Click to expand...

got to put my flight number over 40 this morning. its my favorite plane atm. i havent heard one person say they didnt like their wattaplane.
 
rcguy1958

rcguy1958

50cc
Thanks guys, the idle up sounds like just the ticket. Not looking hopeful for flying today, going to feel like it's in the low 20's all day here & windy.
 
joshgluck

joshgluck

100cc
GYRO said:
I use an " idle up" on my air planes, and that helps with the punch the from low end. I basically set a switch to the trottle, and use it to keep the prop spinning at a low rpm when flying.
This cuts out the time the ESC spends trying to get back in sync with the motor.
Click to expand...

Gary can you explain this a little more? Are you saying that the switch basically increases your throttle to say 25 when the stick is at dead bottom?
 
gyro

gyro

GSN Contributor
joshgluck said:
Gary can you explain this a little more? Are you saying that the switch basically increases your throttle to say 25 when the stick is at dead bottom?
Click to expand...

Close, but not 25%. I use my gear switch to take the motor from a dead stop, to a slow spinning prop (enough to keep the prop spinning but not move the plane on the ground)
This allows the esc to keep it's timing in sync and improves the throttle response from the bottom of the stick.
The problem I've found is that normally when we go to the low (bottom stick) throttle position in flight, the esc stops sending pulses to the motor, but the prop keeps spinning due to air flow. When we move the stick up, the esc has to "find" the timing, as the motor is spinning, not stopped like the esc thinks. By having the esc keep the motor spinning slowly, this sequence is avoided (and the occasional screech sound that accompanies the motor and esc being out of sync) and the secondary benefit is improved throttle response from the low stick position.
 
joshgluck

joshgluck

100cc
GYRO said:
Close, but not 25%. I use my gear switch to take the motor from a dead stop, to a slow spinning prop (enough to keep the prop spinning but not move the plane on the ground)
This allows the esc to keep it's timing in sync and improves the throttle response from the bottom of the stick.
The problem I've found is that normally when we go to the low (bottom stick) throttle position in flight, the esc stops sending pulses to the motor, but the prop keeps spinning due to air flow. When we move the stick up, the esc has to "find" the timing, as the motor is spinning, not stopped like the esc thinks. By having the esc keep the motor spinning slowly, this sequence is avoided (and the occasional screech sound that accompanies the motor and esc being out of sync) and the secondary benefit is improved throttle response from the low stick position.
Click to expand...

Awesome explanation. Thank you!
 
wedoitall

wedoitall

Member
rig'd up some epp to look like CF LG to go over my wire gear. looks pretty sweet , especially with the wheel pants back on.
 
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