Just put my blackjack29 leopard engine need help with prop size

[Alexbarber]

This is very similar to the v3 set up I run m642

Which is ur set up? Am trying to get the most mph possible of course running the strut etc mines is also a v3

[Alexbarber]

I got a question many say a x442 but I seen ppl put a x442 on a stock blackjack29 mines has a hobbywing 180a esc and a leopard 4074 2000kv which I've read it revs a higher rpm than the stock proboat set up I don't wanna order a x442 prop if it isn't going to do as well as a x445 prop I need help before I purchase this prop I know it has to be balanced and etc I just want to know which mm will be great for a top speed. Thanks

[Make-a-Wake]

The stock BJ29 turns at a lot lower rpms when run with factory settings, 4s lipo, so it can spin an x445, you are turning a lot more rpms. You are running a high amp draw setup and will be pushing that 180a ESC hard with an x445, x442 is all I would go if it were mine, and that's on the large size for your setup too.

[Luck as a Constant]

M440 prop.



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[Mr_3_0_5]

The stock blavkjack v3 comes with a 2000 kv and I run it on 6s with a m642
If your not into S&B a prop buy a couple cnc props
I have a x442 and it didn't do much better then the stock prop maybe even lost a mph or two
I put the m642 and broke the shaft during testing the highest I hit was 50.4 but the shaft broke so I know there is more there

[Make-a-Wake]

He didn't mention V3 so I assumed it was the older standard one.

[Alexbarber]

Yes I have the new v3 I gps it today it ran 52.1mph with stock prop mr305 I leave in Miami lakes let me know if u wanna gather up and ride sometimes I also have a brother with a spartan. If anyone can send me a link on where I can find those props I'll highly appreciate it

[Alexbarber]

Is this a 1.6 pitch would this be a good prop? http://www.offshoreelectrics.com/pro...od=cnc-4214250

[tlandauer]

To the best of my knowledge, these a CNC props have 1.4 pitch.

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[tlandauer]

More like x 442

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[montymike]

Because u have a 180 a esc a m445,x642,Prather ss220 all would be good props on 5s or less batteries. If u want to go fast (above 50ish) buy a bigger more reinforce hull or do it yourself. That hull as is won't take to many 60+ crashes because ask anyone on here cats sooner or later pushed to hard end up upside down.

[dasboata]

I would say a reduced down X445 also the pic you showed us,, is Right hand rotation,, I have the X445 in stock and can do up a race prop for you PM me if interested thanks chris