16' Scooter Question(s)?

Designs for inboard or outboard power

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Rollbar
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Location: Palm Harbor, Florida

16' Scooter Question(s)?

Postby Rollbar » Thu Jul 20, 2017 6:56 am

I'm thinking of this build (link below) 16' Scooter and wondering if my 25hp Merc 2S would push it well or if a total flat bottom would be best instead of the tunnel hull for the lower HP/25? I didn't see any min HP on the site page so I don't know one way or the other.
I can go either way for a fishing hull and would like to extend it by 10% LxW if it is doable for the HP I have as for now.
Thanks,
Jim
http://www.boatdesigns.com/16-Scooter-s ... ducts/486/

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NAMEngJS
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Re: 16' Scooter Question(s)?

Postby NAMEngJS » Thu Jul 20, 2017 12:44 pm

You will still be able to push her with a 25 HP Merc, granted not as quickly as the 120 that it is rated for. You may know this but incase you dont, FYI older engines were not rated at the prop like newer outboards, so that 120hp when the vessel was designed would be less at the prop. Most vessels can be increased 10% in length simply, not saying that beam cant be done as this is a simpler hull (not as much shape where the lines could be come unfair in a more moulded hull form.

Also, IMO I would keep it a tunnel hull, the tunnel effectively allows you to have the prop shallower while maintaining full immersion. If it were a flat bottom vessel you would have to make sure the prop and cavitation plate were below the transom bottom edge or risk cavitation, or go with another outboard option like a surface piercing prop or a gator tail.
All men dream, but not equally. Those who dream by night in the recesses of their minds, wake to find that it was vanity: but the dreamers by day are dangerous men, for they may act on their dreams with open eyes, to make them possible.

Rollbar
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Re: 16' Scooter Question(s)?

Postby Rollbar » Thu Jul 20, 2017 12:57 pm

Thanks for the reply and information. Wondering what speed I could see out of the 25? Hoping at least 20mph but if I go 10%+ then ?? I was thinking that the tunnel would be less buoyant and longer to get on plane but it would help in cornering etc. Like you said, I can run the motor a little higher and with out a jack-plate I'm thinking.
'94 25hp Merc 2S 15" and with that, I think I can build the transom w/the 20" height and still be ok in the water UNLESS I'm not understanding the tunnel correctly. Wouldn't building the transom that way put me were a 5" jack-plate would put me anyway, or do I still need the motor adjustable?

Thanks for the help,
Jim

Rollbar
Posts: 17
Joined: Wed Jul 19, 2017 7:27 pm
Location: Palm Harbor, Florida

Re: 16' Scooter Question(s)?

Postby Rollbar » Thu Jul 20, 2017 5:52 pm

Okoume/Weight-Light/Strength-Not strong/Decay and Rot Resistance-Poor/Fastening Ability-Fair/Comments-Suitable for light, small boats.


The Hull weight on the web site for the 16' Scooter states (approx.) 600 lbs.
1. Can anyone answer what the OEM used as far as wood to get their hull weight of 600lbs?
2. Question, if I use Okoume what weight is expected building the Scooter?
Thanks,
Jim

http://www.glen-l.com/designs/special/scooter.html

http://www.glen-l.com/wood-plywood/bb-chap5e.html

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Bill Edmundson
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Re: 16' Scooter Question(s)?

Postby Bill Edmundson » Fri Jul 21, 2017 6:28 am

Jim

This will give you an idea. This total running weight (Including ice chest)/HP. http://www.glen-l.com/how-fast/

Bill
Mini -Tug, KH Tahoe 19 & Bartender 24 - There can be no miracle recoveries without first screwing up.
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Rollbar
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Re: 16' Scooter Question(s)?

Postby Rollbar » Fri Jul 21, 2017 7:15 am

Bill Edmundson wrote:Jim

This will give you an idea. This total running weight (Including ice chest)/HP. http://www.glen-l.com/how-fast/

Bill


Awesome thanks. I'll take a look at it.

Rollbar
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Re: 16' Scooter Question(s)?

Postby Rollbar » Fri Jul 21, 2017 7:19 pm

Question on the Tunnel Hull and drainage.
In your opinion, would it be best to put a drain plug (screw-in type) on each side of the hull just in case?

Rollbar
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Re: 16' Scooter Question(s)?

Postby Rollbar » Mon Jul 24, 2017 2:21 pm

Ok thanks for the help everyone.
Just ordered the plans for the 16' Scooter. :mrgreen:


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