Moebius (Revell) Skipjack Build

[He Who Shall Not Be Named]

Excellent Tom!, good to hear you like the SAS, it's the brainchild of a united effort on this forum, i only delivered my part to the system.
Can you make a vid from your SAS adventure?, wanna hear her woooosh.
As for connecting your SAS float, if i remembered right, you had designed a magnetic airconnector, i suppose you want to use this for easy handeling the SAS, great design!


Manfred.

Right you are, Manfred. In fact, Tom had sent me some samples of what he's worked up in the way of magnetically latched plumbing connectors, as well as a more robust version of our magnetic linkage connectors. Feast your eyes on his work here:

[MFR1964]

That's slick!!

Manfred.

[He Who Shall Not Be Named]

That's slick!!

Manfred.

Take a bow, Tom!

Here's our source of those and all sorts of other plated magnets:

http://www.gaussboys.com/

M

[MFR1964]

Thanks for the link David, it will be most usefull in the future, you never know when i need strangely shaped magnets.

Manfred.

[trout]

Thanks again for the kind words and encouragement. I have not been able to get the sub in the water for trimming and filming. Yes Manfred, I will get some video for you. The RTV is drying on the screws in the ballast tank. I weighed all the lead used so far and it came out to 805 grams or 1.774 pounds. I am trying to get my head around how I will make the aft end balance out while surfaced. I love the way building subs challenges and makes you work for a solution.

[MFR1964]

Yeah Tom, building subs stirs up the mind and brains, that's what i like the most, looking forward to see the vid, thanks for taking the effort.


Manfred.

[alad61]

Looks good so far Tom and yep the s.a.s is brilliant. With the trimming don't over think it. Most of mine is on and just forward of it's cog with a bit of foam on the hull split. To get my aft level with a full ballast I added foam above the water line. Not the normal thing to do but it got it level. Can't wait to see your first run.

[trout]

The big pieces of lead are placed in the sub. So a little was in the front and a bit of foam is in the rear. I moved some weight around and shaved off an ounce and a half of weight.

with it leveled off, it was still a little high in the water. Added 1/2 oz. back on the sub near the center of balance.

That was just enough to bring it to the top of the sail. I think that is a good spot.

That worked. It settled nicely.

The video is last, there is a reason.....and I blame Manfred.
Upon blowing out the ballast tank. Again the rear was very high. (and I bent the prop)

You can see that completely emptying the ballast tank the sub as a whole rises high.

I will need to complete the trimming in the solid walled test tank (tub)

I will get that sound for you Manfred.

[MFR1964]

You did what!!!, you armchair admiral!!!, get a broom and wipe the mess hall, when finished get me that whoosh sound.

Manfred.

[He Who Shall Not Be Named]

You bent my prop ..... you ****!

Plenty of reserve buoyancy in that SD -- you'll learn to goose the pump to get just enough water out to float the boat at the designed waterline.

Almost there, pal!

Yeah, we want to hear that 'slurping' sound the head-valve makes when the float gets above water. And when you do, can you dub in some bump-and-grind porn music?

Thanks.

M

[Peter W]

Tom, looks lovely I like that a lot. I keep looking at the prop on the Akula and wondering how vulnerable it looks as all my other subs have propulsors. I did once lose the propulsor off the Trafalgar though, just fell off, military grade loctite now holds it on.

Can't wait to see this buttoned up and hear the slurp.

Peter

[trout]

Thanks guys, I am still chuckling about the puncture to the kiddie pool. It was time for a new one and if anything it brought a certain joy to my wife that it will not be set up on the patio. Anyways, I have been annoyed at the alignment of the front of the sub. One side or the other will pop in rather than stay on the track. I looked through the pictures of David's build and I saw one that I think may have been David's solution.

I added some curved tabs to the top portion of the hull.

That made an immediate difference. This morning when i put it together there was no fighting the alignment, it just fell into place.
As a side note, I balanced my sub and it comes up a bit behind the sail. This is in the air so is this considered the center of gravity? or just center of balance dry?

[alad61]

Tom did you balance with the sd with battery installed? As for balancing on the bench to test the cob the reaction around the pivot point will be quicker than trying it in water as air and water have similar characteristics. I learned this when my wife and I went on a hang gliding joy ride a couple of years back...

[trout]

Alec, yes it was done with battery installed. Not sure what a jangling joy ride is, but it sounds interesting!

Vindication......

Maybe the pool today after I sleep.
Now Manfred, the ball is in your court. Type XXIII video in the wet.

[MFR1964]

Excellent Tom!!!!, a nice whoosh the second and third attempt, you're now officially releaved from mess hall duty.

I only wonder why i didn't hear the woosh the first time, did the float kept stuck to the inlet?, or it simply levelled the pressure without the sucking noise?

As for my XXIII, first some retracting stuff, testing the SD and take the plunge into the test facility, in that order.


Manfred.