82[bolger] Re: Idaho?
- Aug 4, 1999Joe,
Chuck Leinweber (on this list) has built Tennessee, and may jump in and
answer some of your questions... (help, Chuck!).
I only know Tennessee has a bit of rocker toward the stern, and is
advertised for low-hp (9.9 typically) engines. This makes her pretty much a
displacement boat with some extra speed potential for being light and
narrow. That's 7 knots plus the light/narrow factor, I would guess 8.5-9.0
knots (9.8 - 10.4 mph).
I have built a few small boats (and bought or studied more than I will
admit!), and a real planing hull is almost flat to even a bit "hooked" at
the stern in order to keep them more level and minimize the bow-up plowing
that precedes rising to plane. Big power boats use hydraulic trim plates to
hook the bottom going up to plane, then trim toward flat for cruising on
plane. For a simple boat like Tennessee, flat is probably close enough to
give her some planing potential if enough power is installed. Rule of thumb
here is one hp per 50 to 100 lb weight. If we assumed 75 lb/hp for
Tennessee and 1500 lb, we are at 20 hp just to sustain planing, and probably
35 hp needed to acheive planing initially. Based on Gregg's experience with
the Sneakeasy (which is flat) I'm probably still a bit optimistic. BUT, I
have said I would settle for 11-12 knots (12.6 - 13.8 mph) or so with two
aboard if not redlining the engine and just plowing along.
So, I'll just leave the question out here: has anyone clocked a Tennessee
with 25 hp installed, "stock" or with a flat bottom?
Lynn Haven, FL
----- Original Message -----
Sent: Tuesday, August 03, 1999 11:08 PM
Subject: [bolger] Re: Idaho?
> Thanks, Don, you ended my search! I also discvered that the beam of
> Idaho is only 63". Limits your interior options, not to mention the
> I notice Tennessee carries 72" of beam. What kind power/speed
> properties are expected as she's drawn? What's your goal in the bottom
> Joe Bradford
> Henderson, KY
> <007e01bedd25$3b504f80$cbb14d0-@default> wrote:
> original article:http://www.egroups.com/group/bolger/?start=70
> > I'm not sure whats going on with the "Common Sense" outfit, but last
> time I
> > looked, there was some Idaho material at www.common-sense-boats.com .
> > www.common-sense-designs.com is closed.
> > Don Hodges
> > Lynn Haven, FL
> > (BTW, Gregg, I'm taking another look at Tennesee as a project - do
> you know
> > if the side planks are 3/8? I'm looking into MDO and it doesn't come
> > thinner than 3/8 inch. Also, any thoughts on taking out the rocker
> aft and
> > going to about 25 hp for Tennessee for maybe 15-18 mph?)
> > ----- Original Message -----
> > From: Joe Bradford <bradford@...>
> > To: <bolger@...>
> > Sent: Saturday, July 31, 1999 4:06 PM
> > Subject: [bolger] Idaho?
> > > I am trying to ind the plans, or the colection of plans that
> include, P.
> > > Bolger's "Idaho" design. Can anyone out there help me?
> > >
> > >
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