Light weight motors?

[Drax21]

There are quite a few 500 heli outrunner motors that are lighter and similar in power and then you could air cool them so you would not have water jackets.

Thanks this was very informative. I guess its always a good option, i have seen them used a few times with good results

[Fluid]

Its great on a deep V but it really slows down my cat. I have seen other Apparitions run and mine is the only one I have seen lean.

Cats shouldn't lean much in a turn, they are designed to turn flat. If the outside sponson digs in it really hurts turning performance and promotes rolling over. The only cats I've seen lean much had very narrow sponsons which could not support the boat's weight, or which had rudders which were too small. The Apparition and its clones don't lean much, neither the ones I've seen nor the one I run, so you may be on to something with the weight. That said, these hulls don't turn that well anyway with their narrow beam and usually have to be slowed down to make a sharp turn. They are best in a straight line or in gentle turns.

If you are really concerned about motor weight, try using small format motors like the UL-1 or AQ1500 (depending on voltage). These can still give decent speeds depending on the prop but will drop about 11 ounces in boat weight. Will this be enough to solve your problem?


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[Drax21]

Cats shouldn't lean much in a turn, they are designed to turn flat. If the outside sponson digs in it really hurts turning performance and promotes rolling over. The only cats I've seen lean much had very narrow sponsons which could not support the boat's weight, or which had rudders which were too small. The Apparition and its clones don't lean much, neither the ones I've seen nor the one I run, so you may be on to something with the weight. That said, these hulls don't turn that well anyway with their narrow beam and usually have to be slowed down to make a sharp turn. They are best in a straight line or in gentle turns.

If you are really concerned about motor weight, try using small format motors like the UL-1 or AQ1500 (depending on voltage). These can still give decent speeds depending on the prop but will drop about 11 ounces in boat weight. Will this be enough to solve your problem?


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Yeah, thanks for the info Fluid, I will get that bigger rudder as you said before. I have a new video of a run with the cat. I lifted up the back end with 2 small pieces of a buoyant material, worked a lot better, still some lean though. Wasn't looking to bad then the drive dog came loose. (I need better hex keys) Here's the video http://www.youtube.com/watch?v=XXi-fEljNzQ&hd=1

[Drax21]

Cats shouldn't lean much in a turn, they are designed to turn flat. If the outside sponson digs in it really hurts turning performance and promotes rolling over. The only cats I've seen lean much had very narrow sponsons which could not support the boat's weight, or which had rudders which were too small. The Apparition and its clones don't lean much, neither the ones I've seen nor the one I run, so you may be on to something with the weight. That said, these hulls don't turn that well anyway with their narrow beam and usually have to be slowed down to make a sharp turn. They are best in a straight line or in gentle turns.

If you are really concerned about motor weight, try using small format motors like the UL-1 or AQ1500 (depending on voltage). These can still give decent speeds depending on the prop but will drop about 11 ounces in boat weight. Will this be enough to solve your problem?


.

One more question how long should the rudder be. Would 130mm be good enough?
Thanks