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by Bill Edmundson
Sat Nov 18, 2017 7:18 pm
Forum: Boat Power
Topic: Gear ratio....i'm so lost
Replies: 14
Views: 126

Re: Gear ratio....i'm so lost

Joe

If your engine will turn 4800, I assume it's not diesel. At 10 knots, that's about 65% of WOT. That is about right for gasoline. Diesels at 80-85%. The prop estimates should be good as starting point. Cruise RPM should bee about 2875.

Bill
by Bill Edmundson
Sat Nov 18, 2017 1:10 pm
Forum: Boat Power
Topic: Gear ratio....i'm so lost
Replies: 14
Views: 126

Re: Gear ratio....i'm so lost

Joe

With a 2:1 ratio and 4600 RPM, I'm seeing a 16x11 prop. 16x10 at maybe 4800 and 16x12 at maybe 4400.

Let me try a different approach. What RPM is the max Torque and continuous operating RPM? That should be near the cruising speed. Boats are really about torque not ultimate HP.

Bill
by Bill Edmundson
Fri Nov 17, 2017 7:28 pm
Forum: Boat Power
Topic: Gear ratio....i'm so lost
Replies: 14
Views: 126

Re: Gear ratio....i'm so lost

What Ken said. Plus, depending the exposed shaft length you may want to consider a whip strut.

Bill
by Bill Edmundson
Fri Nov 17, 2017 5:03 pm
Forum: Power Boats
Topic: Glen-L Party Boat
Replies: 8
Views: 108

Re: Glen-L Party Boat

Actually, I would love to build this boat, now. But, time and sensitivity to epoxy don't make it possible. I need to finish and run what I have!

Bill
by Bill Edmundson
Fri Nov 17, 2017 1:25 pm
Forum: Boat Power
Topic: Gear ratio....i'm so lost
Replies: 14
Views: 126

Re: Gear ratio....i'm so lost

Joe

Check with the prop-shops on the shaft dia. 1 1/8 may be plenty. 3000 RPM gives a blade tip speed near 200 MPH. After that you can get blade tip cavitation on a 16" prop.

Bill
by Bill Edmundson
Fri Nov 17, 2017 12:41 pm
Forum: Boat Power
Topic: Gear ratio....i'm so lost
Replies: 14
Views: 126

Re: Gear ratio....i'm so lost

Joe I'm no expert on these hulls, for sure. I don't know about HP on these boats. But, you will be looking for a shaft RPM of 3000 w/16" prop. That gets you to a 1.5:1 gear. A 16" prop you will probably need a 1 1/4" shaft, maybe 1 1/8". I think a starting point on the prop would...
by Bill Edmundson
Thu Nov 16, 2017 5:04 am
Forum: Hankinson designs
Topic: Neeley's Barrelback - Sacramento
Replies: 117
Views: 22619

Re: Neeley's Barrelback - Sacramento

Jim

Funs Over! NOW! Get back to SANDING!

Bill
by Bill Edmundson
Mon Nov 13, 2017 10:51 am
Forum: Hankinson designs
Topic: Neeley's Barrelback - Sacramento
Replies: 117
Views: 22619

Re: Neeley's Barrelback - Sacramento

Jim

I'd be very happy with that!

Bill
by Bill Edmundson
Mon Nov 13, 2017 9:38 am
Forum: Power Boats
Topic: Neel's Palm Beach 22 build
Replies: 88
Views: 2078

Re: Neel's Palm Beach 22 build

Neel

This transom doesn't look that heavy to me, lots of parts. I don't know the Gentry build up. Here is a picture of the Tahoe 19 build up. Both, top and bottom have that heavy laminated build up. That makes transom drains impractical.

Bill
by Bill Edmundson
Sun Nov 12, 2017 8:46 am
Forum: Power Boats
Topic: Monaco Restart
Replies: 119
Views: 12899

Re: Monaco Restart

You might check with Hundley Chris Craft. They have tons of old parts. You might have to do some work to clean the stuff up. They are in Lake Houston TX.

Bill
by Bill Edmundson
Sat Nov 11, 2017 10:55 am
Forum: Design Modifications
Topic: External Keel for V Dory
Replies: 4
Views: 127

Re: External Keel for V Dory

Cpt.

You might want to contact this guy. http://boatbuilders.glen-l.com/v-dory-d ... am-machala

Bill
by Bill Edmundson
Fri Nov 10, 2017 10:57 am
Forum: Power Boats
Topic: In hull Transducers
Replies: 12
Views: 265

Re: In hull Transducers

I've wondered about this, too. I'm not happy about my exterior one and didn't think I wanted a thru-hull.

Bill
by Bill Edmundson
Fri Nov 10, 2017 10:40 am
Forum: Power Boats
Topic: I guess it's time to come out of the closet!Bartender 24
Replies: 1439
Views: 183924

Re: I guess it's time to come out of the closet!Bartender 24

Thanks all.

Dr. Mike said it's fairly minor. Will probably be out patient on Tuesday,

Bill
by Bill Edmundson
Fri Nov 10, 2017 7:41 am
Forum: Power Boats
Topic: Neel's Palm Beach 22 build
Replies: 88
Views: 2078

Re: Neel's Palm Beach 22 build

Draining between the knees... I would either drill a drain hole through the sides or just fill the space in.

Bill
by Bill Edmundson
Thu Nov 09, 2017 3:01 pm
Forum: Power Boats
Topic: Building The Vera Cruise
Replies: 2106
Views: 235638

Re: Building The Vera Cruise

Neat boat for sure. The tag on the side says Higgins.

Bill

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