|
Thanks Alec, that was what I suspected. Of all the pictures I have of your sub, I only have one that shows part of the original rudder. From the looks of that picture your rudder was at least a foot more forward then mine is. Which would make a bit of difference in the leverage it would have to turn the sub. I've been wondering for some time now if my rudder and the two nice fiberglass fairings in front of it were installed after the Captain and his crew built the sub. In the picture I have of a Trident Exploration K-250 it shows a matching lower rear fairing to the upper rear MBT and double rudder, like the ones I've seen in the Captain's book. Also in that picture I can't see a side conning tower viewport. This makes me wonder if Dr. LeSchack bought two K-250's or if they modified the one they bought to have the Brook's type viewports and the rudder and fairing assembly. http://www.frappr.com/?a=viewphoto&id=2628470&pid=6671686 Regards, Brent Hartwig Subject: RE: [PSUBS-MAILIST] Not the Brook's K-250 Date: Wed, 2 Jul 2008 09:17:09 -0400 From: Alec.Smyth@compuware.com To: personal_submersibles@psubs.org Mine had a
rudder originally, as per the captain's original design. However, the rudder was
just not useful because the boat is too slow for it to have any noticeable
effect, even on both thrusters. Much less would it let you go straight on
one thruster, so you are correct -- you can only go in circles if you lose a
side thruster for any reason. I highly recommend replacing the rudder with
a live rudder (third thruster).
Alec From: owner-personal_submersibles@psubs.org [mailto:owner-personal_submersibles@psubs.org] On Behalf Of Brent Hartwig Sent: Tuesday, July 01, 2008 5:21 PM To: personal_submersibles@psubs.org Subject: [PSUBS-MAILIST] Not the Brook's K-250 Then add a extra Optima Blue Top deep cycle APM battery or two internally for extra endurance. I can easily remove some weight from the inside lead plates bolted to the double keels to allow for the extra batteries weight and there displacement of the buoyant air inside the hull. I think my metacentric height will still be ok since the extra batterie(s) will be low. I was thinking that if I move the SCUBA tank cradles up that I could fit in the extra batteries in down low. I'll have to see how it works out in the CAD assembly. Then learn how to do the weights and moments calcs on it. I won't be doing the CAD work on my sub until I finish the other CAD projects I've got going with other guys sub projects. The original VBT is gone and was likely rotted out from being made out of steel and not being able to coat the inside of the tank. Using it in saltwater didn't help much either. I will have a new SS VBT made and tested by my friend that makes SS tanks commercially here locally. My sub is not the Brook's K-250. Yes the side downward looking conning tower viewports look and are likely the same, but there are other large differences. As a kid I used to play those games of what's different in this picture from that picture. Now all that hard training is becoming useful. In the Captain's book there is a picture of the Brooks sub and if you compare it to the LeSchack sub you will notice that the conning tower reinforcement collar on the Brook's sub is curved to the shape of the hole cut in the main pressure hull for the conning tower to 3", and it goes under the side conning tower viewports. On the LeSchack sub the conning tower reinforcement tube is cut straight across like the later model K-350's. http://www.frappr.com/?a=viewphoto&id=2628470&pid=10109902&myphotos=1 I received a full set of K-250 plans with my sub, and in two of the larger drawing layouts they show a early MBT design that was shorter like the Brook's sub has. With a overall length of 10'-6". The later drawing dated 2/14/77 shows the flat conning tower collar and a new longer MBT design which is on my sub with a new overall length of 11'-8". My sub is just a little longer then that in the stern because of the tangle guard weldment. Alec can you send me any pictures you have of Mark Ragan's sub? Regards, Brent H. Subject: RE: [PSUBS-MAILIST] I dropped the drop weight on a K-250 Date: Tue, 1 Jul 2008 09:55:17 -0400 From: Alec.Smyth@compuware.com To: personal_submersibles@psubs.org Congrats!!! Painted yellow and with the extra viewports, your boat
looks almost exactly like Mark Ragan's. I'll be happy to share any K250
information you find useful...
Alec The contents of this e-mail are intended for the named addressee only. It contains information that may be confidential. Unless you are the named addressee or an authorized designee, you may not copy or use it, or disclose it to anyone else. If you received it in error please notify us immediately and then destroy it. From: owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org] On Behalf Of Brent
Hartwig
It took a bit of tapping with a hammer, but I got the lever
to move to release the drop weight on my very own
K-250. Sent: Tuesday, July 01, 2008 3:33 AM To: PSUBSorg Subject: [PSUBS-MAILIST] I dropped the drop weight on a K-250 That's right my fellow SMMO's, I just finalized the deal to purchase the Kittredge K-250 #105, that was built after the Brook's K-250. My K-250 is the one build for Dr. LeShack, that is talked about in the Captain's book on pages 260 and 261. Now you all know some of what I've been up to of late. ;)' I have loads of new data to tell you guys about this sub. Alec I'll be needing to take you up on your offer for tech help. Jon if you could forward this email to the Captain and ask him if he has any more data on the Dr. LeSchack K-250 #105, like pictures, a Bill of Sale to know the date sold, as well as any other data would be wonderful. From what I can gather the sub and it's trailer were built in 1977. I was also able to get the trailer at the last minute. The last owners modified the trailer a bit by adding six feet to the front bed, so they could use it for another application. I'll have to cut it back again or beef it up to handle the subs weight better. I'm guessing that the #105 means that my sub was the fifth K-205 model George and his crew built. Jon you can tell George that that the wooden plugs are gone, the Sea Co electrical thru hulls didn't hold up well, and that Dr. Leonard A. LeSchack has a doctorate in Geology. I'm a bit jazzed as you might imagine. ;)' http://www.frappr.com/?a=viewphoto&id=2628470&pid=10107229 http://www.youtube.com/watch?v=rp2RN4j9-00 Obstacles are those frightful things you see when you take your eyes off your goal. - Henry Ford "Write a wise saying and your name will live forever." ~ Anonymous Cheers, Brent Hartwig |