Motor stringers

A forum for contacting other builders of Ken Hankinson designs. These designs are now a part of the Glen-L family.

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admjake
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Joined: Mon Nov 12, 2018 10:40 am

Motor stringers

Post by admjake » Tue Jan 15, 2019 12:53 pm

I am ready to purchase Sapele boards for the motor stingers to be used on my 19-20' Barrelback.
Full-length boards are available but at a significant surcharge, is there a benefit that justifies the increased cost?

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Bill Edmundson
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Re: Motor stringers

Post by Bill Edmundson » Tue Jan 15, 2019 1:18 pm

admjake

My stringers are laminated 1x's. Each one also is spliced. The splices are not under the engine.

Bill
Mini -Tug, KH Tahoe 19 & Bartender 24 - There can be no miracle recoveries without first screwing up.
Tahoe 19 Build

283
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Location: Maine

Re: Motor stringers

Post by 283 » Tue Jan 15, 2019 3:45 pm

Laminated is often stronger and straighter than solid lumber.
Mike

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Roberta
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Re: Motor stringers

Post by Roberta » Tue Jan 15, 2019 4:50 pm

I used four quarter white oak sandwiched between 9mm Okoume plywood ((both sides) nailed and glued. Rock solid stable and straight as an arrow. You could do this with Sapele.

Roberta
Roberta "Queen of the Boat Builders"
Built Zip "Oliver IV", Super Spartan "Jimmy 70", and Torpedo "The Glen L".

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Jimbob
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Location: Sacramento, CA

Re: Motor stringers

Post by Jimbob » Tue Jan 15, 2019 5:22 pm

I made my motor stringers by laminating two sapele boards together with scarf joints away from where the engine would be. I checked for straightness during the lamination process. Screws were used in the gluing process. They came out perfectly straight. (the lamination process will result in straighter stringers than one solid piece) Pics below.
Jim
Attachments
P1010061.JPG
Cutting the scarf joint
P1010060.JPG
The scarf jig
P1010046.JPG
motor stringer glue up
Jim Neeley
Building a Barrelback in Sacramento, CA
viewtopic.php?f=15&t=28089#p172969

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Jimbob
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Location: Sacramento, CA

Re: Motor stringers

Post by Jimbob » Tue Jan 15, 2019 5:28 pm

After the motor stringers were both glued up. I clamped them together to cut the notches for the frames. I did them both at the same time to insure that the frames would be in alignment.
Jim
Attachments
P1010063.JPG
Notches in the motor stringers
P1010051.JPG
Cut notch for a frame
P1010050.JPG
Cutting the notches both stringers clamped together for the cut
Jim Neeley
Building a Barrelback in Sacramento, CA
viewtopic.php?f=15&t=28089#p172969

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Bob Perkins
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Re: Motor stringers

Post by Bob Perkins » Wed Jan 23, 2019 8:10 am

Agreed - laminate and scarf - stronger and more stable.. with the benefit of less cost.
Regards,
Bob Perkins

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https://bperkins.wordpress.com/

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