V drive question

Fastjeff
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Re: V drive question

Post by Fastjeff »

Guess which one is a royal pain in the *ss to work on!

Jeff
"We live at the bottom of an ocean of air, not at the top." General Marvage Slatington
EWRice
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Re: V drive question

Post by EWRice »

Fastjeff wrote:Guess which one is a royal pain in the *ss to work on!

Jeff
They are all a pain to work on! :lol:

To go back to the original post. The reduction gear is determined by 3 things: prop diameter, engine rated rpm and intended hull speed. Prop diameter is the biggest factor. Depending on the number of blades and blade design, the diameter will limit the speed the prop can turn. All props have a maximum blade tip speed (in feet per second) that they can turn before cavitation occurs. The new Acme props have been able to increase this for a given size. Hydrodynamics is fascinating stuff!
Muskegon Lake
1972 32' Express flybridge
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1963 Thompson Super Sea Lancer
Graymarine 327
1961 Alumacraft 12'
'55 10hp Johnson
Hiramsaint
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Re: V drive question

Post by Hiramsaint »

Thanks, I think I have it now. A Velvet drive has the engine facing forward with a tranny and a shaft going straight to the stern-is that correct?
Matt
No boat yet but in the hunt
EWRice
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Re: V drive question

Post by EWRice »

Inline, conventional, straight drive are all names for drives where the transmission bolts to the back of the engine and has a prop shaft running through the bottom of the boat, through a strut, with a prop on the end.

Velvet drive, paragon, hurth, twin disc are all brands of transmissions. Some also make v drives.
Muskegon Lake
1972 32' Express flybridge
"AL13"
Twin 318s
On board air & prime 920
1963 Thompson Super Sea Lancer
Graymarine 327
1961 Alumacraft 12'
'55 10hp Johnson
Hiramsaint
Tin star
Posts: 33
Joined: Mon Jul 02, 2018 2:49 pm
Location: Hiram, Ga.

Re: V drive question

Post by Hiramsaint »

Thanks, so much, for taking the time to explain this to a newbie.
Matt
No boat yet but in the hunt
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