Mine is the heavier one from the other Whirlwind company. https://www.whirlwindaviation.com/props/STOLGseries.asp The pitch change time can be measured in seconds without removing the spinner. I have not used a balancing device on it and have found no need to even use one as it does run smoothly.Sky has or had one on on his Cub and wrote about it here a few years back.
LOVE mine. Have it on my 160HP. I started out with an 82".. I think it was a bit too much. I swapped out center hubs to the 'short hub' and that got me down to an 80. IF i was only on wheels.. I'd do a 78.. and really have some speed. As I do floats and skis too... 80 should be perfect.
I set it out coarse for a long trip.. it helped, even with the 31s. Got home and got it set a bit too flat.. but should be perfect for skis and floats.. which is my next two planned uses.
As other said.. 20 minutes to change. I find I occasionally hit on a setting that's super smooth, and others that don't run quite as smooth.
JP
This method plus a BalanceMaster......SMOOTH!
how much does that Balancemaster weigh? anyone got the weight?
View attachment 48734
ive continued to work with the WW GA200 on my CarbonCub
Yesterday we had a Deere tractor go down with a faulty speed sensor. That led to a quick trip to the dealership 120 miles away in the bird. It was just me in it so I took a few minutes and set the prop at the highest number I have tried to date, this was at 15
Would only pull 2280 rpm on climb out and at cruise it wouldn’t hit 2700 redline but close
Mostly saw 116 mph at 8.5 gph, this plane is on 31s
All the above comments are true, some settings are much smoother than others
i had originally thought the STOL performance with this prop would be better with thevengine able to redline just as you lifted off, but not true
It pulls much harder at 2550 than at 2700
It always seems to be in the wrong pitch setting, if you want to play on gravel bars after a long flight to get there, or you find you have to give someone a ride and wish it was flatter
Overall it’s pretty impressive, and surprising how little adjustment it takes to make a big difference
that said , the dealer I got it from said Catto had got most all of the low hanging fruit with their design, so don’t buy a whirlwind to gain takeoff performance if you are running a Catto. I am going to try the 84/42.5 back on it next week to compare some more
And now Cory Robin is running a 86 inch Sterna ga on his CarbonCub with great results. Only 2 weeks left to defend my honor at Cubcrafters Northeast Stol you know
jim
View attachment 48734
ive continued to work with the WW GA200 on my CarbonCub
Yesterday we had a Deere tractor go down with a faulty speed sensor. That led to a quick trip to the dealership 120 miles away in the bird. It was just me in it so I took a few minutes and set the prop at the highest number I have tried to date, this was at 15
Would only pull 2280 rpm on climb out and at cruise it wouldn’t hit 2700 redline but close
Mostly saw 116 mph at 8.5 gph, this plane is on 31s
All the above comments are true, some settings are much smoother than others
i had originally thought the STOL performance with this prop would be better with thevengine able to redline just as you lifted off, but not true
It pulls much harder at 2550 than at 2700
It always seems to be in the wrong pitch setting, if you want to play on gravel bars after a long flight to get there, or you find you have to give someone a ride and wish it was flatter
Overall it’s pretty impressive, and surprising how little adjustment it takes to make a big difference
that said , the dealer I got it from said Catto had got most all of the low hanging fruit with their design, so don’t buy a whirlwind to gain takeoff performance if you are running a Catto. I am going to try the 84/42.5 back on it next week to compare some more
And now Cory Robin is running a 86 inch Sterna ga on his CarbonCub with great results. Only 2 weeks left to defend my honor at Cubcrafters Northeast Stol you know
jim
I hope you've been practicing