KamaII

[Bigshrimpin]

Ha . . . all could think about when he said the 21 hull might benefit from some more flare was this boat (21 with spray rails and flare)

[McGillicuddy]

Is. Trader, thanks for re-posting your note from Big fluke. Interesting points on the flair and splash rails.

As I recall, Bushwacker's colleague, Bob - was not as fond of the splash rails idea. I have toyed with the thought of continuing the flair on my 21 and this really validates my thought process.

Nice photo, Big. Any other angles of that hull?
I keep looking at the 21 wondering why the flare didn't continue up and out.

Only thing I could figure was less favorable aerodynamics and less water to shed ...

[Bushwacker]

Originally Posted by McGillicuddy

As I recall, Bushwacker's colleague, Bob - was not as fond of the splash rails idea. I have toyed with the thought of continuing the flair on my 21 and this really validates my thought process.

Very interesting post Terry! Do you know if Big Fluke ever got more info on the 23? It is most definitely NOT a streched 21! The step heights are less on the 23 and there appears to be more deadrise in the outer panels, so Potter apparently did not follow Moesly's design principles when he designed the 23. More deadrise in the outer panels should help the ride, while raising min planing speed and hurting load carrying ability, but the relationship between panels is also different and I'm sure that's very important too. The 21 would plane at about 12 mph with an I/O, and I've never heard of a 23 being able to plane that slow. Big Fluke's impression of the difference in ride between the 21 and 23 are consistent with my experience as well as my friend Bob who owned the Moesly 21 "Unohu". I suspect Bryan/3rd Day has ridden in both the 23 and 21 more recently, so would be interesting to get his comments as well. I understand Potter gave Mr. Moesly a ride in the 23 as soon as they returned from their first circumnavigation trip; Carl, being too much of a gentleman to tell him what he really thought, supposedly just said "Well, there are a few things I would have done differently"!

Gilley, Bob absolutely loved the ride of the 21' Unohu; he's pretty stubborn, and was of the mind set "if it ain't broke, don't fix it"! I wasn't surprised that he wouldn't consider spray rails, as he ran it for over 10 years without trim tabs! He finally changed his mind and added them after following me into Lucaya years ago into a particularly nasty 3' chop. He passed me as I was only running about 15 kts, but I think I was more comfortable than he was at 20 kts! For what it's worth, I think Skip is planning to add spray rails to his 21, and I'm sure he can give you some good design info on them.

Carl once told me, in response to a question about differences between the 21 and later hulls, that he intentionally designed the 21 with very little dynamic lift, "because you're not making much forward progress where there is a lot of vertical motion"! That may explain the lack of flair and the "spray deflector" conventional strakes he added to the 25 and 27' hulls, and the flat at the forward chines on the 20's. I'm sure that staying dry was not a big priority on the race boats! Denny

[Bigshrimpin]

Originally Posted by Bushwacker

Very interesting post Terry! Do you know if Big Fluke ever got more info on the 23? It is most definitely NOT a streched 21! The step heights are less on the 23 and there appears to be more deadrise in the outer panels, so Potter apparently did not follow Moesly's design principles when he designed the 23. More deadrise in the outer panels should help the ride, while raising min planing speed and hurting load carrying ability, but the relationship between panels is also different and I'm sure that's very important too. The 21 would plane at about 12 mph with an I/O, and I've never heard of a 23 being able to plane that slow. Big Fluke's impression of the difference in ride between the 21 and 23 are consistent with my experience as well as my friend Bob who owned the Moesly 21 "Unohu". I suspect Bryan/3rd Day has ridden in both the 23 and 21 more recently, so would be interesting to get his comments as well. I understand Potter gave Mr. Moesly a ride in the 23 as soon as they returned from their first circumnavigation trip; Carl, being too much of a gentleman to tell him what he really thought, supposedly just said "Well, there are a few things I would have done differently"!

Gilley, Bob absolutely loved the ride of the 21' Unohu; he's pretty stubborn, and was of the mind set "if it ain't broke, don't fix it"! I wasn't surprised that he wouldn't consider spray rails, as he ran it for over 10 years without trim tabs! He finally changed his mind and added them after following me into Lucaya years ago into a particularly nasty 3' chop. He passed me as I was only running about 15 kts, but I think I was more comfortable than he was at 20 kts! For what it's worth, I think Skip is planning to add spray rails to his 21, and I'm sure he can give you some good design info on them.

Carl once told me, in response to a question about differences between the 21 and later hulls, that he intentionally designed the 21 with very little dynamic lift, "because you're not making much forward progress where there is a lot of vertical motion"! That may explain the lack of flair and the "spray deflector" conventional strakes he added to the 25 and 27' hulls, and the flat at the forward chines on the 20's. I'm sure that staying dry was not a big priority on the race boats! Denny

It's great to get this kind of knowledge, background, and feedback on the hull differences . . . 23 might not be as good as a 21, but it's a damn good riding boat. I can plane in my 23 b/w 11 and 12mph (without tabs too). I suspect the 400lb Pilot house, batterys up front, and a small 370lb motor helps.

[Islandtrader]

Originally Posted by Bigshrimpin

Ha . . . all could think about when he said the 21 hull might benefit from some more flare was this boat (21 with spray rails and flare)

Funny how small this 21 looks...

[Bigshrimpin]

Originally Posted by Islandtrader

Funny how small this 21 looks...

Terry - I'm pretty sure it's #40 John Steinback rigged as a single outboard . . . last 2 pages of the race results. Came in #1 in single outboard division for a few races.

[McGillicuddy]

I remember shipping that red 25 to Hono, 4 maybe 5 years back "Avalon" from NY, I think...the same week I looked at a 24' Airslot out of curiosity. I thought what what would their respective designers talk about over a few adult beverages?

Clearly Big fluke had already considered their merits...

Big, was Steinbacks blue "40" a 21'? and would he have been running a single 140 hp tower of power?

Strick, is Chet kin folk? Interesting note from Big fluke.

[Normagain]

Originally Posted by McGillicuddy

I remember shipping that red 25 to Hono, 4 maybe 5 years back "Avalon" from NY, I think...the same week I looked at a 24' Airslot out of curiosity. I thought what what would their respective designers talk about over a few adult beverages?

Clearly Big fluke had already considered their merits...

Big, was Steinbacks blue "40" a 21'? and would he have been running a single 140 hp tower of power?

Strick, is Chet kin folk? Interesting note from Big fluke.

That's interesting, I looked at a 24' Airslot just before buying my 20' SF. It had a big tower on it and the guy was asking for about what the tower was worth. If I had a few more feet in my parking space, I would probably wound up with that and put a bracket on it. I'd be in it even more deep than I already am however.

[gofastsandman]

Originally Posted by Islandtrader

Funny how small this 21 looks...

Largest 21 I`ve ever seen. I was out of sight inside. Thank you.

Cheers,
GFS