FAO Latestarter

[Chrusty 1]

You weren't very keen on Woodpecker, but what about this? 20 knots max, 12 knots cruising. She looks like what the Americans call a Commuter boat? She has some pretty nice joinery, and a beautifully laid out engine room.

http://www.sandemanyachtcompany.co....-Bridge-Deck-Motor-Yacht-1932/yacht-for-sale/

 

[[2068]]

Why would anyone put 24-valve engines in a semi-displacement boat
Still, plenty of space to work around them.

 

[Chrusty 1]

Why would anyone put 24-valve engines in a semi-displacement boat
Still, plenty of space to work around them.

Well they say she is a semi displacement boat, that's probably why she can do 20 knots without digging a big hole and flopping into it. I don't think a displacement boat of 50 foot or so could do that speed with twice the power, I may be wrong there of course, but water line length and all that.

There is also a very tasty, (well I like it) ex seaplane tender on that site, just a plaything of course, but she has had an "interesting" history.

 

[Latestarter1]

Why would anyone put 24-valve engines in a semi-displacement boat
Still, plenty of space to work around them.

Well that was my first thought, then I think I got inside their heads.

Very simple reasoning. This vessel would have been built with flathead gasoline six cylinder engines of around 100 hp each. For example Chrysler Crowns, big old iron lumps which were in continious production from around 1930 to 1955.

Yanmar LP is very refined, very similar envelope and weight to Chrysler Crown, even rotational speed not a mile apart 3,200 Vs 3,800 rpm. Using the Yanmar would have enabled use of same diameter shafting uprated to Aquamet, all common sense stuff.

Yes understand your initial reaction then it all falls into place.

PS She is a dream.

 

[jfm]

Using the Yanmar would have enabled use of same diameter shafting uprated to Aquamet, all common sense stuff.

Beautiful boat

That's an interesting comment Latestarter. Yes there would have been huge advantages during the refit in keeping same dia shafts and just getting modern metal. 1.5inch monel feels right on the limit (haven't looked up tables) and therefore an additional benefit of those yanmars is that they make their 312hp @3800 not at say 3000, ie they have less torque than some other 300hp motors. That might have been part of the decision to choose them, in that their smaller torque/high rpm meant the 1.5inch shafts were just ok.

It's a shame the black tank is right there in the engine room but boat building is all about compromises and they probably had no choice.

Yup, very nice machine

 

[Firefly625]

I love it, what a wonderful gentleman's motor yacht.

 

[Chrusty 1]

I love it, what a wonderful gentleman's motor yacht.

She is rather gorgeous isn't she! I often go and have a squint at that site, it's where I go to get me rocks off!.........Well no not really, but it's definitely boat porn, raggie or mobo, it don't matter to me, a beautiful boat is a beautiful boat.

Some people say to me why do you bother looking at stuff like that, you can't afford it? The reason is, I just love classic boats, it doesn't matter to me that I can't afford stuff like that, I just love to look at the skill and craftsmanship that went into building them, and indeed to maintaining them.

 

[Erik C]

A nice video explaining the engine start up procedure of another well known classic. The name Thunderbird fits perfectly.

 

[Chrusty 1]

A nice video explaining the engine start up procedure of another well known classic. The name Thunderbird fits perfectly.

P38 engines, Blimey!!! I wouldn't want their fuel bill, even if they are de-tuned down to 1100hp a piece!

Lovely sounds though, including the bang!