Blackhawk drives. Rooster Tail?
07-03-2008 | 11:49 PM
#14
Gold Member
Joined: Jan 2003
Posts: 199
Likes: 0
From: Oshkosh, WI
Black Hawks are Surface Drives
Dan,
The Black Hawks you see in the pictures I posted are at about a half a click above straight trim on your Livorsi guage. Since they are surface drives, they send a rooster similar to a number six, but not the same volume. Put it this way, I did not loose any speed because the drives were out too far....
The Black Hawks you see in the pictures I posted are at about a half a click above straight trim on your Livorsi guage. Since they are surface drives, they send a rooster similar to a number six, but not the same volume. Put it this way, I did not loose any speed because the drives were out too far....
07-04-2008 | 01:59 PM
#18
Thread Starter
Registered
Joined: Oct 2007
Posts: 1,273
Likes: 0
From: Rolla/LOTO MO
07-14-2008 | 04:40 AM
#19
Registered
Joined: Dec 2004
Posts: 1,820
Likes: 5
From: Turku, Finland
When I first rigged it, I never gave much thought to the fact that factory, they had the exhaust routed thru the drive to airate the props. I blew a vertical shaft in two trying to get on plane. Repaired the drive, designed and fabbed an airation system for the props and have since pounded 160hrs onto the drive without a failure 
Building a bigger motor this winter. Will have the drive freshened and we'll see what it can take next summer.
PS, My daytona with a 500efi averaged 30 hrs per Bravo before the switch to the bh drive.
Building a bigger motor this winter. Will have the drive freshened and we'll see what it can take next summer.
PS, My daytona with a 500efi averaged 30 hrs per Bravo before the switch to the bh drive.
Any close up pics of your venting of the props ?
07-14-2008 | 04:41 AM
#20
Registered
Joined: Dec 2004
Posts: 1,820
Likes: 5
From: Turku, Finland
