Can some one give me the Pro's and Cons for the Drive types available
EG
Jet Drive
Sub Drive
Semi surface

As there is a Boat I am keen on but it is a Sub drive

man. you got your answer on RRR.

Sorry but there no problem with asking for more opinions

Finally I did
Everyone was way too concerned with the Boats Power then the question I had asked..

But from what I can gather.
Sub Drive use too much power for forward motion but better in reverse
Semi Surface has High Cavitation till the Boat gets up on plane but uses less power and gives higher top speed

Just need to find the draw backs of Jet drive..

So for rough water a Sub drive would be better??

jet drive is slow . quick acceleration and good turning .

jet drives arent necessarily slow (some of those drag boats that do 100+mph have jets (full size boats tho) they just have a certian rpm where it cannot get water fast enough and just cavitates like theres no tomorrow.

sub drives arent good with rough water because although they have good grip, the props they use cavitate massivly if ever intoduced with air because they are full submerged when the boats on plane, unlike a surface drive, so when you junp a wave and the prop gets out of the water and then goes back in, its cavitates.......

however, subsurface drives are quicker when accellerating from a stop because their position in the water has no air so it grabs the water immidiately instead of cavitating untill the boats on plane...

they also need more tourqier motors becuase of the extra resistance they have unlike surface drives...

so your pest bet would be a surface drive, they can take rough water without cavitating too much, they can reach a higher rpm, there is no point at which they are rotating so fast that they cavitate (well, and rpm that can be reached by an average motor unless running on more cells than whats "realistic") and they have less opposing force as subsurface drives...

100mph is good . but instead of a jet drive on the boat put a prop and you will see even faster top speeds.


actually subdrives are better in rough water.

yes, but they arent as fast (as you stated) so when jumping wake, they arent as fun

I saw I think it was an E-bay boat with a Tunnel drive??
The prop was in a Tube thing. Sorta like a Jet but shrouded Just around the prop area?

Yes I see this thread, but I'll refrain from putting in my pro's/cons of jet drives, as it will get ripped to shreds. []

i think tha tube concentrates that water to the prop or keeps air from entering and causing cavitating until the boats on plane....sounds similar to something i saw on MHZ....could also be a type of jet drive too...

eyekandy, could you explain to me why subdrives are better?

my SW (surface drive) jumps wake and gets the prop completely out of the water a lot and almost never cavitates, but i also had a sub drive boat that every time the prop came out of the water it would cavitate when it came back in untill i let go of the trottle and let the air escape...

similar to these??

http://206.206.85.209/xtdoc/Details....2&store=mhzusa

http://206.206.85.209/xtdoc/Details....0&store=mhzusa

Well every boat cavitaites. I'm going to refer to the sv27 because of the fact most of you have it .
Well as we know it is surface drive. takes a while to get on plane which i find weird. Hydro do that only because the prop is in such a way you have the throw it to get on plane. and cats are not like that . my cat has great acceleration also does the villain Both boats do not cav like the sv27.
But a sub drive is different. great for everything but speed. lighting fast reflexes. you know why? It is because all of the rudder and all of the prop is in the water, so it can take full use of every thing unlike the surfacedrive, where only a bit of prop and rudder is in the water during a run.
Sub drives are good for rough water.
not many boats cavitate on rough water. most boat when hit rough water tend to run more lose. there is a smaller ride pad which mean more speed and it just hops over the waves. when you hear you motor rev out; you know that the prop is out of the water . But that is no cavitating because once it hits the water it grabs and keeps moving you forward.

nope. I doubt that ebay will have those.
those are boats that have trouble getting up on plane and going fast. and ebay boats don't even get on plane

that want true with my subdrive boat (it was a nikko, so i guess it was a PoS)

but it would be easier to set up a surface drive as there is more hardware for surface drives, plus they mainly have less drag.

well
It is easier to set up a sub drive because of the less hardware and they can preform very well to there standards with out fine tuning.
To get the most out of a surface drive you have to make sure it is spot on.
i was running my scat cat yesterday and i found another sweet spot.
so what i do is mark it with a exact knife so i know that its good.
Funny how just about 1 mm down the boat can preform so crappy!

no, i mean there is more AVAILABLE hardware, not the hardware is eaisier to setup

i got to study up on this stuff more.

Yes Very much like that but the U Shape Extended around the whole prop much like those ona Submarine sorta set up..

I also Had a Toy boat when I was 7 that had a Very Simple Jet Drive..
The Motor was mounted Vertical with the Impeller Directly under neath it and the Blades would turn were Curved but Dead vertical much like the set up on a Hand Blender and it had a Steerable outer Jet.. Was Very effective..
Only Problem I could See with its design was that if it was moving fast enough There wouldnt be any water for the Impeller to push.. It was sort of a "New Saftey" Design for toy boats where the Propeller was hidden in the Hulll so little fingers couldnt get cut..

the vertical drive you describe is the same as outboard motor jet drives, well the same principle.

Spot on Quicksilver thats exactly like what my Toy boat had only it was in board

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