Zulu

[He Who Shall Not Be Named]

Can do. I'll pick up some 2.5" Lexan this week. Gas it is, sir.

David

OK, I got a length of 2.5" Lexan in the shop. How about this: five inches for the after dry-space (the three-motor motor-bulkhead is shorter than the other motor-bulkheads); five-inches for the ballast tank (even with the big gas bottle you have nearly nine-ounces of ballast water); and a six-inch long forward dry-space for the battery (which can be shortened if you go with a tighter battery pack if you wish).

The above comes in with a cylinder length of seventeen-inches (two-inches longer than the fifteen-inches you stated, but you can cut off some of the forward cylinder to make the fifteen-inches if needed).

I don't want to cut Lexan till we agree on the division of the three dry spaces (by the way, the seventeen-inches accounts for the thickness of the forward and after ballast bulkheads). So, Scott, get back to me ASAP and I'll start in on the two SD's (one for me, one for you).

Here's the 1/72 FOXTROT and its three-motor SD -- pretty much like the unite I'll be working up for our ZULU's.







David

[Tirfing]

Hi David. Really interesting stuff, your markings. How do you do in the first photo? Are you cutting the tape to shape the lines?

[He Who Shall Not Be Named]

I sent you a PM. Better read it.

Some ways to achieve draft marking bars:














David

[HardRock]

Beautiful! How did you add the White lines? Is it decal or just masking and a steady hand?

I sent you a PM. Better read it.

[HardRock]

Got the windows fitted today. Bit of filling required now.



Also fitted the emergency buoys.

[vital.spark]

From the Fleet Sub Operations Manual of 1946 please read as it fully describes all fleet boat air systems:

https://maritime.org/doc/fleetsub/air/chap1.htm#1A

This is the complete Wikapedia, Fleet Sub Manual on Steroids!

If one has several months spare time you could study the entire fleet boat manual!!! Best of luck

[bwi 971]

Ah... now I see your cunning plan. Take a simple situation and COMPLICATE IT BEYOND BELIEFE! I have a good friend who reminds me of you. He is a professor of gynacology who did a certificate in diesel mechanics so that he could work on his own trucks - unfortunately it takes him three times longer to do anything mechanical on the engines because he has to go in through the exhaust pipe!

LOL.....hope he didn't use the tailpipe to make out with the girlfriends on the backseat.

[HardRock]

Ah... now I see your cunning plan. Take a simple situation and COMPLICATE IT BEYOND BELIEFE! I have a good friend who reminds me of you. He is a professor of gynacology who did a certificate in diesel mechanics so that he could work on his own trucks - unfortunately it takes him three times longer to do anything mechanical on the engines because he has to go in through the exhaust pipe!

[bwi 971]

Your beast has three screws. Perfect -- I have just the motor bulkhead for your SD

David

So you can't do it with a single motor.....with a gearbox and two clutches for the outer shafts.....
I'm taking cover now....running silent and deep...humbly working on the dive planes.

Grtz,
Bart

[HardRock]

Far out. I'll be able to water ski behind this thing.

[He Who Shall Not Be Named]

Your beast has three screws. Perfect -- I have just the motor bulkhead for your SD

David

[HardRock]

See; there ya go. No need to go to Wikipedia to get schooled. Hang around here long enough and you WILL learn something!

[He Who Shall Not Be Named]

"Gas only" The way the big 1:1 boy's do it !

Well, actually ....

.... Normal practice is to leave the high pressure air-banks alone. The boat is planed up to broach the sail (where the main induction valve is); the air induction valve opened and the tanks are pressurized with the low pressure blower to get the water out. Gas is used to squirt some air into bow-buoyancy (old school), emergency blow, or just to get the boats main induction high in rough seas.

David

[vital.spark]

"Gas only" The way the big 1:1 boy's do it !

[He Who Shall Not Be Named]

Its a deal. I'll get over to the shed in a minuter and start slinging glass. The total weight of the above water bits is 5.25 Oz. If we add a 20% margin for safety that comes to 6.3 Oz of boyancy needed. This is a test fit of the 2.5 SD from my Alfa:


There is plenty of room to make the SD longer if necessary.

Can do. I'll pick up some 2.5" Lexan this week. Gas it is, sir.

David