RaisedByWolves
FRIEND
Whirlwind Ground Adjust?
- Thread starter Scouter
- Start date
And with the recent shortage of Lays lights in the store we sure hope you have great crops this year. ;-)
Finally got some time with the new prop this morning. I'm impressed. Far exceeded any expectations I had. Set at 12.8, I had better pull off the ground than the Catto I was running and the climb was notably better. Higher airspeed at a steeper rate of climb. Repeated and consistent. I don't think the Catto (84/37) was a bad prop (obviously), just not as well matched for my engine and airplane as the WW 80". But, here's the shocker. Before I put my LE slats on, I was seeing a cruise speed of 90..... maybe 94 in perfect conditions with the Catto. After I installed the slats, I felt like I was plowing at 79-82. The slats were awesome in slow flight and for everything STOL but, in cruise, I wondered if they would be worth it. Today, over the hour and a half... I checked it several times because I was so surprised. With the slats and this new prop, I was getting consistently 96-98 indicated in straight and level cruise at 2450 rpm. Couldn't believe that even with drag devices on my LE's, I got a better cruise than without and the other prop and bettered my cruise with them by 15 mph. Crazy. So, happy to report that in all categories, for my plane, the Whirlwind 80" is a more efficient prop without a doubt.
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Matthew7581
Registered User
Also curious about a date and following this. Waiting on the acme black ops shocks as well.., we’ll see who wins the certification race
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Dave Barras
FRIEND
New Iberia, LA
courierguy
MEMBER
Inkom, Idaho
Yeah the actual number doesn't matter, except for sharing the info with others. Ground adjustable props are old news to us LSA types, the norm, though I have a Prince fixed pitch myself on my 912S.
One trick we came up with that I used when I set up my backup ground adjust 79" Luga prop, was to make a simple jig, so that I was able to replicate exactly where I placed a laser level (a cheap Harbor Freight one, so simple they can't screw it up) on the blades each time. Didn't matter where that point was, just so it was the same on both blades, and a stick cut to length that set the height off the ground exact each time, and like you mention that doesn't have to be level. I set it by static RPM, with no idea where to start, you guys have a good data base now, I had to sneak up on it. Once I got in the ballpark, I made a mark on the hangar floor, with the tires chocked and some plugs out. That laser gives you a few feet of lever arm so to speak, as compared to a little digital cube, so extremely minor blade movements move the dot on the floor a lot. This is probably more accuracy then needed, but it can't hurt. That's great you're getting good results with just the angle cube, that says a lot about the prop. I like the lightening holes in Barras's prop wrench, nice touch!
Tim
FRIEND
Petersburgh, NY
Tim
FRIEND
Petersburgh, NY
How about some deminsions so we don't have to reinvent the wheel
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Dave Barras
FRIEND
New Iberia, LA
Dave Barras
FRIEND
New Iberia, LA
Dave Barras
FRIEND
New Iberia, LA
Dave Barras
FRIEND
New Iberia, LA
I also use a piece of wood to be sure the blades are in the same location from the ground.
cgoldy
Registered User
Moogerah Queensland Australia
Has anyone added some sort of lube to the blade stubs to make adjustments a little smoother. I find I keep overrunning my intended position.
And, I didn’t know that you could get shorter hubs. I’m running 82” and always thought it would be better longer. My mission is stol. Does the longer hub benefit me?
cgoldy
reason for edit - I went and measured the prop properly.
And, I didn’t know that you could get shorter hubs. I’m running 82” and always thought it would be better longer. My mission is stol. Does the longer hub benefit me?
cgoldy
reason for edit - I went and measured the prop properly.
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Dave Barras
FRIEND
New Iberia, LA
My thoughts are that would not be a good place for lube. Which is why I made the prop wrench
skywagon8a
MEMBER
SE Mass MA6
Apply and hold pressure using Dave's tool, then tap the tool close to the blade lightly with a light hammer or other hard object. This should minimize the blade movement.
Also make the tool so that it fits snugly close to the hub. This will reduce the flexibility within the blade.
supercrow
FRIEND
Smith Pond near Millinocket, Me
I have been running the WW for a year and a half and like it very much. Been keeping my 82/43 for a spare but decided a composite spare would be just as good. Sold the borer and bought the Sensinich. Will be mounting soon and can give a comparison of the two on the same eng.and plane if anyone is interested.Already found an old paddle that I am going to make Dave's tool from.
courierguy
MEMBER
Inkom, Idaho
A barn door could be made to fly with current tech right now, doesn't mean squat for real world practicality. Wind turbines to recharge the battery in flight? I assume that is a joke...why not 3 or 4 of them?! Hybrid drive plane much more likely, sooner. Of course that is coming from a guy who drives a plug in Prius. Right now, the combo of gas and e power works, with practicality we expect.
JimParker256
Registered User
Farmersville, TX
Hey, CG, did you post this in the wrong thread? (Sounds like something I would do!)
Dave;
Good idea! I'm in final assembly for this project, made this prop board to fit the WhirlWind blade profile and attached the digital level for convivence. I set the blade at 0 degrees off of the prop hub face then clamped the digital level at zero degrees. Makes it intuitive to set the blade as the level will read what the blade angle is at when referenced like this.
Cheers;
Bob
Good idea! I'm in final assembly for this project, made this prop board to fit the WhirlWind blade profile and attached the digital level for convivence. I set the blade at 0 degrees off of the prop hub face then clamped the digital level at zero degrees. Makes it intuitive to set the blade as the level will read what the blade angle is at when referenced like this.
Cheers;
Bob
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courierguy
MEMBER
Inkom, Idaho
I can't think of a way to tie it in with WW props, so yeah, wrong thread!
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