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Anonymous
Guest
Im going to a 6 blade warp drive from a 5 blade that was set at 9degrees on my 0540, Can anyone tell me what I might want to use as a starting point for the pitch?
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marshmaster pat
Well-known member
Not sure what the factory specified setting would be. I would start around the same pitch and work from there.
We have always set the pitch of the Sensenich and Power shift where the maximum RPMs on the 0-540 are around 2750. We are using near the same pitch as a starting point for a three blade and two blade Power shift on different 0-540s. You can go alittle higher with the RPMs but you had better have a well put together motor.
Have not had a chance to try out those warp drives on the 0-540. Lots of the Louisiana Wildlife and Fisheries biologists run those props and like the snap.
How do you like them?
We have always set the pitch of the Sensenich and Power shift where the maximum RPMs on the 0-540 are around 2750. We are using near the same pitch as a starting point for a three blade and two blade Power shift on different 0-540s. You can go alittle higher with the RPMs but you had better have a well put together motor.
Have not had a chance to try out those warp drives on the 0-540. Lots of the Louisiana Wildlife and Fisheries biologists run those props and like the snap.
How do you like them?
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Anonymous
Guest
I have only tried wooden and warp props, I like the warp drive its seems to hold up well with little maint.
I did sink the boat once and managed to chop a lot of water but no damage to the blades.
I did sink the boat once and managed to chop a lot of water but no damage to the blades.
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Anonymous
Guest
try 7-7.5 degrees
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Anonymous
Guest
I swamped a boat one time with an 8 blade on it. I pulled up on the bank with deep water behind me and the boat didn't stick & slid backwards bringing water over the transom. When the blades hit the water, the pitch of the blades flexed them into the radiator & snapped 3 blades off.You can imagine what it did to the radiator. This all happened with the engine at idle.What an expensive lesson that was.Anyone that runs a Warp Drive on a water cooled boat needs to think seriously about mounting the radiator on the inside of the back of the engine stand. It might save you the $1000.00 it cost me.
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Anonymous
Guest
Set the pitch between 9 - 14 degrees, preferably starting at 10 degrees and work up or down from there.
You want to adjust the pitch so that your engine turns at 2,800 rpm with it throttled up.
With any prop, 2,800 rpm is the magic number.
You want to adjust the pitch so that your engine turns at 2,800 rpm with it throttled up.
With any prop, 2,800 rpm is the magic number.
A
Anonymous
Guest
2,800 is a good starting number but what length is your prop. True tip speed is what dictates the best Prop RPM. The longer the prop the higher the tip speed is. A 72" prop at 2,800 RPM has a tip speed of 599.7 Miles per hour a 80" prop at 2,800 has a tip speed of 665.4 Miles per hour. I have found that a great starting point for any length prop is to keep the tip speed around 100 MPH under the speed of sound. I hope this helps.
STEPTHUNDER
STEPTHUNDER
A
Anonymous
Guest
I never could really get anyone at powershift, sensenich, or warp drive to give me the real answer for what if the perfect pitch and RPMs for a blade. Or at least an answer for that question that matched the answer from another company.
I think power shift used to say with each style of propeller what the maximum RPMs for that blade was, and each style was quite a bit different. We switched from one of powershift's early 2 blade props for an 0-540 that was a cut down version for the 350's. Now they run another style, I believe a signature or cypress style, and both have different suggested maximum RPMs. And the newer Maximus (spelling?) blade for 502 and 454 sized engines turns way less than 2600, in fact I think Max RPMs is around 2400.
The older motorheads around here used to dyno their motors for HP and torque. They always were looking to get a prop to turn just slightly more than the peak of the torque curve on the engine or just below Maximum RPMs, depending on the what motor it was.
Running those 0-540s we always tried to set the pitch on the composites so you could turn up right at 2750 tied onto the trailer. In the field that might be 2800 + or - 50 RPMs. This was just due to the cost of a crank, cam, or block. Lycoming suggests this as the maximum limit for 0-540s and you never know what crank is in the block with some of these motors. However that early Power shift we had would turn 2930 on the old angle valve it was mounted to if you stood on it in the water.
I think power shift used to say with each style of propeller what the maximum RPMs for that blade was, and each style was quite a bit different. We switched from one of powershift's early 2 blade props for an 0-540 that was a cut down version for the 350's. Now they run another style, I believe a signature or cypress style, and both have different suggested maximum RPMs. And the newer Maximus (spelling?) blade for 502 and 454 sized engines turns way less than 2600, in fact I think Max RPMs is around 2400.
The older motorheads around here used to dyno their motors for HP and torque. They always were looking to get a prop to turn just slightly more than the peak of the torque curve on the engine or just below Maximum RPMs, depending on the what motor it was.
Running those 0-540s we always tried to set the pitch on the composites so you could turn up right at 2750 tied onto the trailer. In the field that might be 2800 + or - 50 RPMs. This was just due to the cost of a crank, cam, or block. Lycoming suggests this as the maximum limit for 0-540s and you never know what crank is in the block with some of these motors. However that early Power shift we had would turn 2930 on the old angle valve it was mounted to if you stood on it in the water.
A
Anonymous
Guest
Your absolutely right each style prop is different. I use the 100 MPH tip speed below the speed of sound as a reference. I have found the maximums likes a lot of pitch and very low prop speed. Trust me just don’t run a two blade Maximums especially if you have fillings in your teeth. In my experience the Warp drive likes a little more RPM’S than most props, the Sensenich likes less than the warp drive and the wide blade Sensenich likes even less. The power shift “which is my favorite� has a hit to it just like the warp drive but it does have better thrust at lower RPM’s. The Whirlwind and Terminator are just tractor props their very efficient but have a linear thrust curve. Which is great for a tour boat but boring as hell on a ride boat. Like always it just comes down to what you specific needs are. The Standard Warp drive Prop is a great all around prop for a ride boat under 14 ft.
Waterthunder
Waterthunder
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Anonymous
Guest
I went to a whirwind stump puller 2 blade from a wooden prop on a 0540. I just tried it out yesterday at about 24 degrees and it was horribly loud and didn't work well. I guess that's way too much pitch? Are the multiple blades much quieter and will less pitch work better? Any info would be greatly appreciated! Whirlwind company wasn't much help on pitch setting for my perticular set up. By the way, it's a 14 footer.
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Anonymous
Guest
Mongo,
2,800 rpm on the engine at full throttle is the magic number. Pitch your prop until at full throttle the engine turns 2,800 rpm and that will be the optimum pitch for engine performance. From there you can adjust the pitch up or down according to your own specific requirements.
WaterLizard 8)
2,800 rpm on the engine at full throttle is the magic number. Pitch your prop until at full throttle the engine turns 2,800 rpm and that will be the optimum pitch for engine performance. From there you can adjust the pitch up or down according to your own specific requirements.
WaterLizard 8)
Mongo":1iakm7zu said:I went to a whirwind stump puller 2 blade from a wooden prop on a 0540. I just tried it out yesterday at about 24 degrees and it was horribly loud and didn't work well. I guess that's way too much pitch? Are the multiple blades much quieter and will less pitch work better? Any info would be greatly appreciated! Whirlwind company wasn't much help on pitch setting for my perticular set up. By the way, it's a 14 footer.
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Anonymous
Guest
What engine RPM where you turning when it was too loud. After you get it all dialed in and it turns like you want. Please let me know what kind of vibrations you are experiencing I know when I tried the Maximums it literally shook the boat apart. Yes the blades were matched. I believe the super wide composite blades on the Maximums are so massive they cannot be vibration free if you only run two blades I switched to a three blade and the vibration went away. How wide is your blade?
Waterthunder
Waterthunder
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Anonymous
Guest
My big problem was when I flipped my boat, the tachometer got destroyed so I couldn't ajust my prop to rpm. The local airplane mechanic just gave me an old tach because the hour meter was broken but the tach works just fine. Turns out I didn't have nearly enough pitch so I adjusted it to max out at about 2600 and although I haven't had a chance to put it in the water yet, I can tell it is way better, quieter, less vibration and really putting out some wind. WaterLizard says 2800 is the majic # so I might go a little less pitch. The Whirwind Stump Puller is 12 inches wide and I got the 72 inch blades because that was all my cage would allow. Even with that I only have about 1 3/4 inch clearance at the tightest point. Thanks for the input and when I get it fine tuned, I'll post what I came up with.
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Anonymous
Guest
I'm running a 80in 6 blade turbo warp drive on a 350 chevy with a 2.12 to 1 rotator and have the blades set at 10 on inside and 12 on out side turns 4500rpm and run where i need it to go and jumps right up on plane with 3 people