Re: [PSUBS-MAILIST] Lead Almost Success

["Dan H." <Jumachine@comcast.net>]

James,

 

Put all the heating power you can arrange on the top of your already cast drop weight before you pore the additional hot lead on top of it and it may bond in somewhat.  Also, get the additional 17 pounds of lead as hot as you can before poring it. 

 

But is 17 pounds really going to make that much difference?  Just toss another weight in the hull with you if it's just to get neutral buoyancy your worried about. 

 

Dan H.

----- Original Message -----

From: James Frankland

To: personal_submersibles@psubs.org

Sent: Friday, October 15, 2010 2:08 PM

Subject: Re: [PSUBS-MAILIST] Lead Almost Success

Hi Glen\all.

 

Here is a picture of the final (not quite heavy enough) weight.  Pictures of moulding process are to follow on the website.

 

Im going to attempt to add 17lb of lead to the bottom (in the picture) of it tomorrow.

 

Unless anyone has any better ideas?

 

Kind Regards

James

 

http://guernseysubmarine.wordpress.com/

On 15 October 2010 17:46, glen brown <gbrown091@gmail.com> wrote:

Hi James

If you going to pour the molten lead on top of the solid lead its not going to look too good a couple of SS coach screws should keep it in place.What I done was to make the mould out of 6mm plate then tacked the steel insert (channel} in its position, checking the mould was level hanging from  chain with a scale attached from a gantry .Then melted the lead with LP gas / O2 torch(largest nozel)" in the mould" until I had the desired weight taking the weight of the tackle and mould into consideration .I made a fork like tool for removing all the impurities.I concentrated on keeping all the lead molten .Once the lead had set I cut the angled side of the mould(the bottom of the weight being the top of the mould)  and the tacks off .I used allmost 2 full cylinders of O2.They drop perfectly.

Glen

----- Original Message -----

From: James Frankland

To: personal_submersibles@psubs.org ; member-forum@psubs.org

Sent: Friday, October 15, 2010 5:31 PM

Subject: [PSUBS-MAILIST] Lead Almost Success

Hi All,

 

After a couple of failed attempts, I managed to pour the first of my dropweights last weekend.  It took a while to setup, but in the end poured very well and i was really pleased with the results....until i weighed them.

 

They have come out a bit to light at 133lb. 

 

Its not the end of the world as the steel channel inserts are well embedded into the lead which was what i wanted, so i was going to add the extra lead needed to the top.

 

The question is if i pour the remaining 17lb of lead onto the top of the existing one, will it take to it? or should i put in some stainless screws with the heads sticking out for it to hold onto?

 

I didnt take into account the loss of material for the channel inserts, hence the lighter weights.

 

Pictures to follow.

 

Kind Regards

James