classic shovelnose prop Q

[Rex R]

so I have a proboat bj26 motor in my shovel and the club class limit is a 40mm prop...seems ok for speed w/ a 640, but methinks there is more potential. looking for a prop suggestion or two. tia
rex

[Diegoboy]

What is the hull material and length?

[Rex R]

abs, 24". motor is rated @1500kv, and running 4s lipo.

[JimClark]

Not sure what the difference in the X440 would be but it would be worth a try

Jim

[Rex R]

tried a k40 on it...wasn't impressed(motor stayed cool tho...) thought I'd try an x440/3 see if that gives it some speed...

[RayR]

Have you considered a Y537/3?

Ray

[tylerm]

Maybe get in touch with andy brown or dasboata(cant remember if he does small props) and get them to do you a 40mm prop. They will be able to cup and shape the prop to what you need.

[Rex R]

er nooo, I can't say that had considered a Y537/3...did wonder about a v937/3 tho...

[Jimmy Sterling]

We run a Shovel with a 9XL (1800kv) on 4s / 12cells
We found that a x440/3 is the best prop to run as the boat is very quick but always comes back cool after a 5 lap race.

The Proboat motor being a slightly lower KV, you might get away with a x442/3

[Ub Hauled]

Rex, get the M series... it comes already detonged.
I'd suggest an M440 or an M445... if you get the 45 then you have the choice to cut it back if it seems too much and you feel that the 40 is too little.
I'd stick with 2 blades, they spin faster.

[Rex R]

if I was fun running or in a more open class...I'd probably use a 645... however the class restricts bl motors to 40mm props.

[Ctonez]

I have tried a detongued 440/3 with an SV motor with good results. Gotta get the file out though...and a little cup will likely give you a bit more.

[Rex R]

right, tested 3 40mm props k40, 440/3, and a 640 of those 3 the 640 is fastest. today I tryed a 645...oooo that was nice, boat was riding as it should(sponsons taking turns on the water), fast. motor was 107F after 8 laps(1 mile). now I just need to find an equivelent prop.

[JimClark]

How bout re cupping what you have that can easially add mph to the boat as well as heat

[J Solinger]

I have never been able to get the 937 to work but I was using it on a high rpm open motor class. They just have too much lift. I don't know if you will match the speed of a m645 but cupping up a m640 will get you close.