Turning in or out?
04-17-2006, 05:32 AM
#1
Gold Member
Gold MemberThread Starter
Turning in or out?
HI!
I am rigging a Phantom 25 feet offshore with twin Merc 2.5 EFI SS engines with straight skeg Sportmasters. The boat is narrow, only 5,5 feet wide. But it has been very stable with a single PM 300 running in excess of 76 mph. The boat runs flat and require positive trim with a single PM 300. Total weight will be approx. 2.900 lbs with driver and fuel.
I plan to use Bravo 1 28 pitch props for cruise, and Chopper II 28 / ET 28 props for wot runs. Estimated top speed is 90 mph+.
Would you spin the props inward or outwards?
Cheeeers and thanks! Toffen G
I am rigging a Phantom 25 feet offshore with twin Merc 2.5 EFI SS engines with straight skeg Sportmasters. The boat is narrow, only 5,5 feet wide. But it has been very stable with a single PM 300 running in excess of 76 mph. The boat runs flat and require positive trim with a single PM 300. Total weight will be approx. 2.900 lbs with driver and fuel.
I plan to use Bravo 1 28 pitch props for cruise, and Chopper II 28 / ET 28 props for wot runs. Estimated top speed is 90 mph+.
Would you spin the props inward or outwards?
Cheeeers and thanks! Toffen G
04-23-2006, 07:52 AM
#4
Registered
Re: Turning in or out?
I found that the handling thing changes alot with how high the props are. Spinning 'out' changed from really squirrely and really fast to very tame and very fast with in one bolt hole ( 3/4"). So, how high are you mounting the motors?
MW
MW
04-23-2006, 07:18 PM
#6
Registered
Re: Turning in or out?
On my boat, spinning 'in' with the prop shaft close to even with the bottom was tricky to drive, it walked like an Alison. I am roughly 1" below and now it's quite tame. The boat require less trim to fly it, because of the downward pulling rotation on the tail. This rotation has been the fastest set-up with everyone (and me) that I have talked to with a twin VEE.
Good luck
MW
Good luck
MW
04-23-2006, 10:46 PM
#7
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Re: Turning in or out?
Originally Posted by TUFFboat
On my boat, spinning 'in' with the prop shaft close to even with the bottom was tricky to drive, it walked like an Alison. I am roughly 1" below and now it's quite tame. The boat require less trim to fly it, because of the downward pulling rotation on the tail. This rotation has been the fastest set-up with everyone (and me) that I have talked to with a twin VEE.
Good luck
MW
Good luck
MW
Welcome to OSO. With your experience I am sure you can and will make a valuable contribution to OSO.
You know me well. Be seeing you soon.
Bob
04-24-2006, 08:23 PM
#8
Registered
Re: Turning in or out?
Hi Bob;
Great surprise to here from you ( my best sponsor ). We have been in Lake Ontario testing for about three weeks now. I hope the big machine is running well.
MW
Great surprise to here from you ( my best sponsor ). We have been in Lake Ontario testing for about three weeks now. I hope the big machine is running well.
MW
04-24-2006, 08:50 PM
#9
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Location: Marco Island, FL; Waterloo, ON, CAN
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Re: Turning in or out?
Originally Posted by TUFFboat
Hi Bob;
Great surprise to here from you ( my best sponsor ). We have been in Lake Ontario testing for about three weeks now. I hope the big machine is running well.
MW
Great surprise to here from you ( my best sponsor ). We have been in Lake Ontario testing for about three weeks now. I hope the big machine is running well.
MW
Bob
