[weblake]

would a redution a 23-27hp motor and about a 48-55 inch prop get a 1448 up on plane like a mini airboat or would it take more motor and prop

 

[Chiroguyf250]

I dont think it would get it on plane specially with weight in the boat. It would move the boat for sure I just dont know how fast ud go

 

[Chris]

i think if it didnt get on plane, it would be close.

 

[Midnight Sun]

it would move well but dont think it would get on plane need a 35 hp with reduction and atleast a 52 in prop or a 550 rotax setup

 

[weblake]

could i use a v-twin motorcycle engine like a small harley or a honda. if so can i get a reduction that would mount up to it

 

[JpEater]

could i use a v-twin motorcycle engine like a small harley or a honda. if so can i get a reduction that would mount up to it

Sure you could. You would have to find someone to fab you up a custom reduction for that most likely.

 

[Chevyscoot]

35hp + reduction+ 60" prop=fun!!

 

[weblake]

the thing i was worried about with like a 60" is that my boat is only a 48 and might be like 56 or so at the top it dont have but 16 inch sides so it dont get much wider at the top, the reason i was wanting a 23hp is for the cost, when you get up in the 35hp i could get a harley motor off ebay for the same price and have a lot more hp, who could build me a custom reduction

 

[reed]

With a Harley motor you almost do a direct drive. A 1448 with a harley powered fan would be so sick!

 

[mudfish]

Kaw 660 with everything is 5,500.

 

[weblake]

what is this kaw 660 everything for 5500. as for the direct drive harley motor would it not turn to many rpms for the prop

 

[seaurchin1969]

Rotax 503 w/3.47:1 reduction off an ultralight 72" warp drive prop. still ironing out the controls though.

 

[Gbollom]

what is this kaw 660 everything for 5500. as for the direct drive harley motor would it not turn to many rpms for the prop

That is part of the reason for using a reduction

 

[irydhard]

i want to do the same to my 1448 i was thinking a 440 snomobile motor

 

[seaurchin1969]

look up warp drive or hazcon props they will have a tip speed calculator based on prop dia. vrs RPM. one of the reasons to use a reduction is to keep prop tip speed down to reduce noise, another reason is to increase torque so you can use a larger prop or one with more pich.

 

[Cajun_Ag]

Harley motor has power pulse issues that props do not like. I run a 48" 3 blade powerfin on a direct drive 24hp so your gonna need more blades, much wider blades, or longer blades. Reliable reductions are not easy to build unless you have a machine shop at your disposal. I would go the same route as seaurchin on the 503 Rotax. There are reduction built specifically for rotax and with a 48 bottom you need to reduce any unnecessary weight.

 

[Tcoop]

This is an old one but im sure you guys appreciate a good search and find. I've been debating a fan build and had the craziest idea to put a motorcycle engine one, and sure enough here it is. Anyone tried this, id like to see one if so. I know theres supposed to be problems with it but im hardheaded and would have to see it with my own two eyes. I cant help but think about one of these babies pushing my boat.