RE: [PSUBS-MAILIST] Boat operabilty without VBT

["Emile van Essen" <emile@airesearch.nl>]

Cliff,

 

In fact the boat has a VBT. It is only 10 litres and that is a little bit to small.

 

The MBT’s are blown with the LP port.

 

The hatch opening was reducing the boats strength with 50%

 Now I have made 2 support bars which are attached to the hatch and fit closely it the hatch opening.

Now see if the FE calculations are accurate…..

 

See if I can post some pictures to Moki.

 

Regards, Emile

 

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Van: owner-personal_submersibles@psubs.org [mailto:owner-personal_submersibles@psubs.org] Namens Cliff Redus
Verzonden: zondag 10 februari 2008 2:25
Aan: personal_submersibles@psubs.org
Onderwerp: Re: [PSUBS-MAILIST] Boat operabilty without VBT

 

Carsten,

 

I while back you mentioned that Sgt. Pepper was just to small to have a VBT.  Can you give us some of your operation experience with Sgt. Pepper just using the MBT for buoyancy control?  Specifically:

1. When you are ascending or descending, how frequent do you have to adjust buoyancy back to neutral?
2. What is the ROB of the boat?
3. Does the fact that at depth the MBT is not completely filled with water cause any longitudinal stability problems:
4. What is your MBT air capacity and how long does it typically last?
5. Do you blow the MBT off the HP port of your first stage scuba regulator or do you use the LP side?
6. With the recent retrofit of the boat to from 300 to 600 what where the major changes?

 

Even though this boat has been around awhile, it is still a beautiful design.

 

Regards

 

Cliff

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