Welcome guest, is this your first visit?
Member
Discoveries
 
Page 1 of 3 123 LastLast
Results 1 to 15 of 42
Like Tree81Likes

Thread: Restoration of a rare ship/boarding grenade (step by step) - from Princess Maria 1686

« Prev Thread | Next Thread »
  1. #1
    Charter Member
    de
    Restorer

    Oct 2009
    At Home
    1,313
    4466 times
    Shipwrecks, Pool Billard (since 37 years), LR Shooting, Crossbow Shooting

    Restoration of a rare ship/boarding grenade (step by step) - from Princess Maria 1686

    Hi Folks,

    I thought to open this thread and show the process step by step because it is in my opinion a rare complete find in nearly perfect condition.
    The piece has all original ropes, resin or bitumen on it and the fuse is covert with canvas.

    A question to the specialists here: Was this canvas cover to protect the fuse or was it put on to avoid that only the wood fuse blows out when it goes off?

    The ropes at the bottom are simply formed as a loop and this loop was fixed there with a kind of resin or bitumen (Tar), wich is also to find on some spots of the canvas and under the ropes.

    Lets begin with the pics in original condition. The second pic shows the bottom with the loop and the black resin on some spots
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	IMG_6498.JPG 
Views:	33 
Size:	2.45 MB 
ID:	1527869   Click image for larger version. 

Name:	IMG_6497.JPG 
Views:	25 
Size:	1.74 MB 
ID:	1527870  
    Last edited by Tom_Restorer; Dec 19, 2017 at 01:38 PM.

  2. #2
    Charter Member
    de
    Restorer

    Oct 2009
    At Home
    1,313
    4466 times
    Shipwrecks, Pool Billard (since 37 years), LR Shooting, Crossbow Shooting
    Day two.

    To avoid any damage to the organic material, the iron surface between the fragile ropes was cleaned manualy and than the loose ropes was taken apart to treat them seperatly. The next step is to clean the canvas on the upper side to take it off from the wooden fuse without damaging the canvas. In this encrusted condition it would simply break into parts while taking it off.
    The next steps will be the final air abraison cleaning of the iron grenade before it goes into a controled electrolysis and the cleaning and preservation of the organic parts to put them later back on the original documented positions. At the end I will make archaeological sketches in original size with cuts etc. from the grenade, grenade with wood fuse and the the complete piece with ropes and canvas on it to post them here.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	IMG_6499.JPG 
Views:	37 
Size:	3.58 MB 
ID:	1527879  
    Last edited by Tom_Restorer; Dec 19, 2017 at 01:40 PM.
    Kray Gelder, TRG and Blak bart like this.

  3. #3
    Charter Member
    de
    Restorer

    Oct 2009
    At Home
    1,313
    4466 times
    Shipwrecks, Pool Billard (since 37 years), LR Shooting, Crossbow Shooting
    PS: To see the original size of the images, simply right click on the preview image and chose "show picture" and you get the original resolutions.

    Any comments and questions are welcome !
    Kray Gelder likes this.

  4. #4
    us
    papa

    Feb 2017
    Georgetown, SC
    Fisher F75
    941
    1175 times
    Metal Detecting
    That relic is in great condition! Where did you find it? And I haven't heard you mention if it has a charge in it. Seems like an intact package?
    Tom_Restorer likes this.


    "You pretend to pay us, we pretend to work." --- Former Soviet Citizen

  5. #5
    Charter Member
    de
    Restorer

    Oct 2009
    At Home
    1,313
    4466 times
    Shipwrecks, Pool Billard (since 37 years), LR Shooting, Crossbow Shooting
    Quote Originally Posted by Kray Gelder View Post
    That relic is in great condition! Where did you find it? And I haven't heard you mention if it has a charge in it. Seems like an intact package?
    I restore it for a friend who is diver.
    As you can see in the thread description, it comes from the Princess Maria wich sunk 1686, so it was for more than 300 years in sea water. It just looks like a land find because it was pre cleaned and was in fresh water for approx 8 years. The charge is dead like a rabbit now. But anyway, the remaining coal from the blackpowder will be cleaned complete off! After such long time in sea water it will not work anymore!
    Kray Gelder likes this.

  6. #6
    Charter Member
    de
    Restorer

    Oct 2009
    At Home
    1,313
    4466 times
    Shipwrecks, Pool Billard (since 37 years), LR Shooting, Crossbow Shooting
    Cleaning of the canvas in progress.
    I found under the rust layer also very fine ropes wich goes around the wood fuse.
    All of the rust color canīt be cleaned off and the dark spots with the remainings of resin or tar has to stay there as evidence how it was build.
    Unfortunly the rust has damaged some areas of the canvas completly but it is still luck that so much is remaining!
    On one open part it is to see, that the wooden fuse is in very good condition and not collapsed.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	IMG_6500.JPG 
Views:	27 
Size:	2.19 MB 
ID:	1527929  
    Last edited by Tom_Restorer; Dec 19, 2017 at 04:27 PM.
    TRG, Blak bart and Kray Gelder like this.

  7. #7
    TRG
    TRG is offline
    us
    May 2017
    Arizona
    61
    70 times
    Shipwrecks
    Is the iron shell made in two halves and then joined? There looks to be a seam going round it.
    Kray Gelder and Tom_Restorer like this.

  8. #8
    Charter Member
    de
    Restorer

    Oct 2009
    At Home
    1,313
    4466 times
    Shipwrecks, Pool Billard (since 37 years), LR Shooting, Crossbow Shooting
    Quote Originally Posted by TRG View Post
    Is the iron shell made in two halves and then joined? There looks to be a seam going round it.
    Correct! It is made of two halfs of cast iron and welded together. You have on this way also a weaker breaking point if this thing goes off. The piece is quite light for iron.
    To make propper sketches later, I will exaclty figure out the tickness of the iron and check it also inside with an endoskope.

    I try at the moment to take down the canvas from the corrosion. This is the hardest part without damaging something and may I have to protect the canvas first with a thicker layer of paraloid to avoid any breaks on the fibers. This will be later completly removed in different acetone baths untill all Paraloid is gone. After this process I clean the other side of the canvas from all rust.
    This is quite easy. I figured out two different (secret!) ways to clean heavy encrusted and dry organic material without any harm on the surfaces. The only way to loose may some tiny parts is while taken them down from the rust... but this is not to avoid at all. Even when the upper side is cleaned, the downside sits still on rust and when it is removed from it, it is still hard like a surf board and can easy crack.

    The weight at the moment is 486,2 Gram
    Last edited by Tom_Restorer; Dec 19, 2017 at 05:47 PM.
    TRG and Kray Gelder like this.

  9. #9
    us
    beachcomber, treasure hunter, fisherman

    Jun 2016
    FL keys
    Mine lab primary fisher secondary
    2,339
    5527 times
    All Types Of Treasure Hunting
    Banner Finds (1)
    Nice work tom !! Looks great so far. Thanks for taking us through the process. What a cool piece !!
    TRG, Kray Gelder and Tom_Restorer like this.

  10. #10
    Charter Member
    de
    Restorer

    Oct 2009
    At Home
    1,313
    4466 times
    Shipwrecks, Pool Billard (since 37 years), LR Shooting, Crossbow Shooting
    Quote Originally Posted by Blak bart View Post
    Nice work tom !! Looks great so far. Thanks for taking us through the process. What a cool piece !!
    It is real a cool piece and I would love to have this one in my own collection !!
    I would like to know if an other one in this condition with the canvas and ropes exists or if I am the first one who has the honor to restore such an complete piece?!
    I just have found so far pieces with or without the wooden fuse but nothing like this.
    It has to be shown to maritime museums for sure if they donīt have any datas of such an intact piece!

    I found only an old pic wich shows a grenade made out of half-moon shaped bars and wich was holded together by the fuse itself. I guess it was also fixed with tar.

    If someone finds half moon shaped iron bars of approx 8 cm diamerter and half circled cuts on the outside to set in a rope.... it comes from one like this :-)
    Attached Images Attached Images  
    Last edited by Tom_Restorer; Dec 19, 2017 at 06:19 PM.

  11. #11
    us
    papa

    Feb 2017
    Georgetown, SC
    Fisher F75
    941
    1175 times
    Metal Detecting
    Real interesting, Tom. Thanks for sharing your process with us.
    Tom_Restorer likes this.


    "You pretend to pay us, we pretend to work." --- Former Soviet Citizen

  12. #12
    us
    Mar 2012
    Wallingford, Connecticut 1667
    Whites MXT, Surf PI, Surf PI PRO, Dual Field, CZ-21, Vaquero, Home Brewed (3). Detecting since 1972.
    473
    399 times
    All Types Of Treasure Hunting
    Neat. Thanks for sharing.
    Tom_Restorer likes this.

  13. #13

    May 2014
    122
    101 times
    All Types Of Treasure Hunting
    Once again the various kinds of skills of the people who post on this site like Tom make this site my first stop when I turn my Mac on. Enjoyed the post Tom

    Welded together- weaker breaking point?

    I have always found that the welded spot is stronger than either piece that is welded together. Also if you try to mill a weld it is extremely hard material. Just my experience.
    Tom_Restorer likes this.

  14. #14
    Charter Member
    us
    Pirate of the Martires

    Feb 2005
    Pinellas Park, Florida
    Aquapulse, J.W. Fisher Proton 3, Pulse Star II, Detector Pro Headhunter, AK-47
    3,286
    1312 times
    Shipwrecks
    Enrada after reading your post I just had to comment. You are right again. I am a machinist and it is common knowledge among machinists that the weld is harder than the outlying pieces. That is because the heat of welding will "heat treat" the the weld making it harder.
    Tom_Restorer likes this.

  15. #15
    Charter Member
    de
    Restorer

    Oct 2009
    At Home
    1,313
    4466 times
    Shipwrecks, Pool Billard (since 37 years), LR Shooting, Crossbow Shooting
    Quote Originally Posted by enrada View Post
    Once again the various kinds of skills of the people who post on this site like Tom make this site my first stop when I turn my Mac on. Enjoyed the post Tom

    Welded together- weaker breaking point?

    I have always found that the welded spot is stronger than either piece that is welded together. Also if you try to mill a weld it is extremely hard material. Just my experience.
    Thank you enrada!
    You canīt compare this with a modern welding wich is real hard in fact. This is cast iron and I donīt know yet how good the contact between cast iron and the welding material is. If you break casted iron, you can see how weak this material is. Also I have to check the inside if the weldings goes over complete area and ends inside. We will see this later but I guess that the two parts are still open on the inside. If there is no seam inside but a line filled with red rust, we only got an out side welding here wich makes it indeed easyier to "pop off".
    While cleaning I recognised also that the material of the seam is a little bit softer. Ok, it is not iron but Oxyde, but the differense was to see.

 

 
Page 1 of 3 123 LastLast

Remove Ads

Home | Forum | Active Topics | What's New

Sponsored Links

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Similar Threads

  1. Finally started work on the quad jet....step by step with pics.
    By mike(swWash) in forum Dredging & Hi Banking
    Replies: 35
    Last Post: Apr 08, 2015, 06:27 AM
  2. Build A Rocket Stove, Step-By-Step
    By DeepseekerADS in forum Survival Tips
    Replies: 0
    Last Post: Mar 31, 2014, 09:59 AM
  3. Replies: 27
    Last Post: Mar 28, 2011, 08:03 PM
  4. Ariel View Mapping How I Do It Step By Step
    By piggman1 in forum General Discussion
    Replies: 12
    Last Post: Sep 11, 2007, 10:11 AM
  5. NMC Button Area Dig - Step by Step Pictures
    By SouthCarolinaTeacher in forum Today's Finds!
    Replies: 7
    Last Post: Apr 03, 2007, 10:13 AM
Powered by vBadvanced CMPS v4.3.0