Is this worth it

[Brothers 1718]

Is a 42inch aero marine Sprint cat worth building. I did some digging on the forum and found two builds one with a neu 1527 1y and one with a castle 780kv motor . They both seem rather slow from my readings . Is it even possible to get this hull to the 70s while running as an electric. So is it honestly worth building a large but potentially slow boat. If it is worth it what could I possibly use to get this hull to put up some breath taking performance.

[Fluid]

The big SprintCat is most certainly a good boat to build, many run very well as FE boats. The 1527 motor is too small though, it would not run fast for very long. The Castle 2028 motor however is a great choice, 60-70+ is certainly possible but the faster you go the shorter the run time will be.

I built a RCBoatworks F-41 Cat (virtually the same as the SprintCat) several years ago running 10S and a big Lehner motor. I raced it @ 65 mph but could have pushed it harder. It was so worth it to me.


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[srislash]

A 42” good handling cat is sooo worth building. A little hefty to lug around but not stupid. I have a AC R-42 and at 70 it is a hoot and gets the nerves going. Just doesn’t feel right slamming corners full tilt after all my other (not so good handling) cats. I did a twin but next time I think I would go the Castle 2028 route.

[Brothers 1718]

The big SprintCat is most certainly a good boat to build, many run very well as FE boats. The 1527 motor is too small though, it would not run fast for very long. The Castle 2028 motor however is a great choice, 60-70+ is certainly possible but the faster you go the shorter the run time will be.

I built a RCBoatworks F-41 Cat (virtually the same as the SprintCat) several years ago running 10S and a big Lehner motor. I raced it @ 65 mph but could have pushed it harder. It was so worth it to me.


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What lehner did you use.

[Fluid]

What lehner did you use.

As I recall it was a 3060-9 with a Kv of 778. Today I would use the Castle 2028, far less expensive than a Lehner with excellent performance. You have the option of either 8S or 10S with the Castle, but for maximum performance 10S is better. (8S performs more like a gas motor with similar props and speeds.)


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[Brothers 1718]

I looked at the build on the forum and the castle 2028 used had around the same kV (730). But the new 2028 is 800kv. that wouldn't be a real problem correct?

[Fluid]

Not at all. I’ve seem both versions run, not much difference in performance. If I had the choice I’d go with the more modern 800 Kv version.


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[Brothers 1718]

Are there any other motor options? For this hull?any price range please

[srislash]

TP Power 5670 10D. Likely any 56 series would work well, just pick your KV and cell count that you’d like to run.

http://www.tppower.com/sort.asp?class_id=4&news=155

[rayzerdesigns]

A 42” good handling cat is sooo worth building. A little hefty to lug around but not stupid. I have a AC R-42 and at 70 it is a hoot and gets the nerves going. Just doesn’t feel right slamming corners full tilt after all my other (not so good handling) cats. I did a twin but next time I think I would go the Castle 2028 route.

What motors and cell count did u use

[srislash]

What motors and cell count did u use

I overkilled it with Castle 1717’s on 6s2p Or 4p. I am still thinking of putting my pair of 1520’s in on the same cell count. Just to lighten it up a bit.

[Brothers 1718]

I overkilled it with Castle 1717’s on 6s2p Or 4p. I am still thinking of putting my pair of 1520’s in on the same cell count. Just to lighten it up a bit.

Could you post a picture of your boats set up it gave me an idea. also what esc's did you use?

[srislash]

Could you post a picture of your boats set up it gave me an idea. also what esc's did you use?

I’m out of town right now but this is the build thread

https://forums.offshoreelectrics.com...ast&highlight=

I’m running a pair of Castle Phoenix Ices converted to water cooling
I can elaborate more on the weekend.
Here is the last vid https://youtu.be/uuP1Bi1eISk
Just to fire you up. Lol

[Brothers 1718]

That is a cool build .I like how you changed the cowl to it looks nice.

[srislash]

That is a cool build .I like how you changed the cowl to it looks nice.

Thanks, a lot more than needed went into it but it runs great and was fun to build.