20 hydro props
- Thread starter SayMikey
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Mike,,, not sure what boat your running,, but Brett English had a RoadRunner, with a Nova in it. He ran a 1445 3.2 or 3.4 pitch,,, and the thing was a rocket..
RodneyPierce
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Mike, stock Nova?
1450 @ 46.5 mm 3.25-3.75 cup seems to be pretty popular.
1450 @ 46.5 mm 3.25-3.75 cup seems to be pretty popular.
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Mike,
We liked a H-7 @3.21" of cup at 46mm and a short pipe length.
3.33" to 3.46" maximum on the cup and 46mm is right on. Another
Option would be an H-6 @ 3.46" to 3.60" of cup. We have been
Increasing the center of blade pitch for more performance without
Adding any cup to the trailing edge at all.
Have Fun Testing,
Mark Sholund
We liked a H-7 @3.21" of cup at 46mm and a short pipe length.
3.33" to 3.46" maximum on the cup and 46mm is right on. Another
Option would be an H-6 @ 3.46" to 3.60" of cup. We have been
Increasing the center of blade pitch for more performance without
Adding any cup to the trailing edge at all.
Have Fun Testing,
Mark Sholund
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ALLAN YUEN
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Hi Mike Will you try beat to Jeff S 
:lol: He become top sercet his JAE 21 will you trade to his boat :lol:
:lol: He become top sercet his JAE 21 will you trade to his boat :lol:
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Ron Jefferson
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Mikey,
Try an ABC 50x69 with 3.4- 3.6 cup stock diameter. 1450 @ 46mm with 3.4 cup. Or, if you have a strong engine and the ease of launch with the JAE give a 1650 @46mm with stock pitch. I have all these props here if you would like to try them. Let me know if I can help out.
Later, Ron
Try an ABC 50x69 with 3.4- 3.6 cup stock diameter. 1450 @ 46mm with 3.4 cup. Or, if you have a strong engine and the ease of launch with the JAE give a 1650 @46mm with stock pitch. I have all these props here if you would like to try them. Let me know if I can help out.
Later, Ron
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Jeff Schindler
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H7. wish I could stretch it to 48-49 mm. Anyone try a S-15?
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Ron Jefferson
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yes, stupid fast but not much good for heat racing.
Ron
Ron
Bob Morton
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Hi Mike,
I also like the 50+69. Also a 50+62
Nails.
I also like the 50+69. Also a 50+62
Nails.
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Joe Warren
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Well I would have Mark cut you down a H10, Remove the entry (suction side) and back cut the trailing edge as needed. OPS 3280 at 3 1/4
Jeff,
Just add more blade camber to the H-7 and you will be good to GO!
If you add the camber between .5 and .7 radii in the middle of the blade
You will notice a big difference in performance.
Happy Easter,
Mark Sholund
Just add more blade camber to the H-7 and you will be good to GO!
If you add the camber between .5 and .7 radii in the middle of the blade
You will notice a big difference in performance.
Happy Easter,
Mark Sholund
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Jeff Schindler
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we've got a full pound on you!
RodneyPierce
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My AJM rev 2 came in at 3 pounds 8 ounces (3.5 pounds) rtr minus fuel.
It can be done Jeff
It can be done Jeff
Jeff Schindler
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Sure, but I have to buid a new tub, and that not going to happen for a while. I never went crazy on glue, I think I'd have to do something drastic to drop 10 oz!Sure canMy AJM rev 2 came in at 3 pounds 8 ounces (3.5 pounds) rtr minus fuel.
It can be done Jeff
Greg,
Needs more?
More camber in the middle of the blade.
3.8" of cup is not helping you at all, it is killing your RPM.
You can go over 80+ MPH with only 3.46" to 3.60" of cup.
The center of blade pitch or adding more camber into the blade
will help the boat accelerate better and be more responsive for heat racing.
Honestly, just trying to help you learn more about propellers.
Have Fun Testing,
Mark Sholund
Needs more?
More camber in the middle of the blade.
3.8" of cup is not helping you at all, it is killing your RPM.
You can go over 80+ MPH with only 3.46" to 3.60" of cup.
The center of blade pitch or adding more camber into the blade
will help the boat accelerate better and be more responsive for heat racing.
Honestly, just trying to help you learn more about propellers.
Have Fun Testing,
Mark Sholund
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Dam guy'sAlready going over 80 markGreg,
Needs more?
More camber in the middle of the blade.
3.8" of cup is not helping you at all, it is killing your RPM.
You can go over 80+ MPH with only 3.46" to 3.60" of cup.
The center of blade pitch or adding more camber into the blade
will help the boat accelerate better and be more responsive for heat racing.
Honestly, just trying to help you learn more about propellers.
Have Fun Testing,
Mark Sholund
Needs more Pitch
not sure were your at with Camber are you talking twisting from the Root of the blade at the hub ?
Im new to Props this is one of the first i have done that works
looks like everyone is running 80mph with there 21 riggers...
im not near 80 at all...
