Conventional V-bottom hydronamics question..........
#71
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Joined: Nov 2004
Posts: 831
Likes: 2
From: Ocean Pines, Maryland. Wish I was at MANGOS in MIAMI!
Okay so now that all the experts are keyed in to this thread, when seting up my outboards on my Midnight which has a 24 degree V with a pad, what height should drives be in relation to bottom. ( I will be going with quads)
On my last Midnight I was running the bullets of the nose cones (Bob's low water pick ups) even with the bottom of the boat. (No pad on old Midnight) Even higher than shown in pict when I added brackets to outers.
Now that my new Midnight has a pad, can I run the drives even higher?? And other than the obvious water pressure what negative effects will it have?
Thanks
On my last Midnight I was running the bullets of the nose cones (Bob's low water pick ups) even with the bottom of the boat. (No pad on old Midnight) Even higher than shown in pict when I added brackets to outers.
Now that my new Midnight has a pad, can I run the drives even higher?? And other than the obvious water pressure what negative effects will it have?
Thanks
#72
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Joined: Dec 2005
Posts: 2,798
Likes: 13
From: Florida
Good stuff all around. 
One way to resolve many questions is to test. Here is the dilemma. Mags, testing or builder test are not apples to apples. This is planned due to marketing.
I toss this in "the mix”. Let’s have a true test on one of the popular PR. Same weight, same HP. Sim. Lengths, same water conditions, same gal.’s of fuel. . Now.. we can compare boats.
I’ll bet no one will willing to do it. Can’t use the typ. excurses. Fuel, passengers, HP, etc.
Just a thought.. and that’s why boating is personal preference and $’s at the end of the day.

One way to resolve many questions is to test. Here is the dilemma. Mags, testing or builder test are not apples to apples. This is planned due to marketing.
I toss this in "the mix”. Let’s have a true test on one of the popular PR. Same weight, same HP. Sim. Lengths, same water conditions, same gal.’s of fuel. . Now.. we can compare boats.
I’ll bet no one will willing to do it. Can’t use the typ. excurses. Fuel, passengers, HP, etc.
Just a thought.. and that’s why boating is personal preference and $’s at the end of the day.
#73
i have done many repeat scenarios as far as set up.
typicly the c.g is responsible for step placement on a steped bottom(whether 1,2 or more steps) and optimal handling , speed and safety on any hull. then every thing else is applied, x-dimension, batteries , trim pumps, etc,,,, .
this is conducive for a thorough rig.
if it is done correctly then water conditions, fuel load, occupancy, power, etc,,, do not tremendously effect original characteristics of said boat.
proof of this is in the picture above.
typicly the c.g is responsible for step placement on a steped bottom(whether 1,2 or more steps) and optimal handling , speed and safety on any hull. then every thing else is applied, x-dimension, batteries , trim pumps, etc,,,, .
this is conducive for a thorough rig.
if it is done correctly then water conditions, fuel load, occupancy, power, etc,,, do not tremendously effect original characteristics of said boat.
proof of this is in the picture above.
#74
I am not sure who designs all the big names in boats, but AT is a Harry Schoell design and the Cig Top Gun is Michael Peters.
Now, if Cig or AT gets an order for a boat, and the guy wants big power and #6 drives, do you think either of these manufacturers call the designer and see what needs to be done to offset the added weight so the boat is as the designer intended?
The standing line is "I am off to see the wizard"
Did you get your voice back yet? Call me next week.
#75
#76
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Joined: Dec 2005
Posts: 2,798
Likes: 13
From: Florida
#77
(If that was a whipped 180* turn, then AT's have problems turning)
Yes, I would have felt fine turning my boat like that - it was just a turn. I have turned my boat much tighter. Did I think the AT boat was skittish? I think "loose" would be my description. My 28' Powerquest felt skittish.
__________________
BillR
'00 Scarab Sport 302 CC
'02 Cigarette Top Gun TS
'02 PQ 340
'00 PQ 280
'98 Scarab 22
'97 Baja Outlaw 20
'72 Checkmate
'65 Glastron
BillR
'00 Scarab Sport 302 CC
'02 Cigarette Top Gun TS
'02 PQ 340
'00 PQ 280
'98 Scarab 22
'97 Baja Outlaw 20
'72 Checkmate
'65 Glastron
#78
Now I am curious, what changes are made? For example, Macklin said his boat was built w/o a cabin liner, thus the boat is 700lbs lighter. In that instance, what did Harry tell you to change to keep the boat balanced?
Do other manufacturers do this?
Pat, voice is back, I'll call ya next week.
__________________
BillR
'00 Scarab Sport 302 CC
'02 Cigarette Top Gun TS
'02 PQ 340
'00 PQ 280
'98 Scarab 22
'97 Baja Outlaw 20
'72 Checkmate
'65 Glastron
BillR
'00 Scarab Sport 302 CC
'02 Cigarette Top Gun TS
'02 PQ 340
'00 PQ 280
'98 Scarab 22
'97 Baja Outlaw 20
'72 Checkmate
'65 Glastron
Last edited by BillR; 12-22-2007 at 09:26 PM.





I've already asked Steve to add "Dict-Chek" to the posting window similar to "Spel-Chek.