johnboy wrote:I wonder if the metal hooks were just measured from the top to bottom. On these example the ropes/cables are the same but the actual hooks at the end are different sizes. I know the one on the right is slightly off centre, but the curved shape of the hooks are the same on both. The right example also has a very slightly longer neck above the hook.
This very small differences in the length or shape of the hook may be either due to the deformation of the material during cooling (this is very common by small parts), or due to the deformation of the material by the larger mechanical stress (and this is also very common by small parts)
Antonin
Tinman wrote:The Scammell and the Thames wreckers were introduced only months apart and ended production at the same time. They shared metal and plastic hooks. If a specific hook is found on one, it will also be found on the other. There is more than one size metal hook recorded in several catalogs. So either the various catalogs are wrong and their is only one size metal hook or there are shorter/longer hooks out there. People need to be checking all their 13c models as well (because if it's found on one it will turn up on the other).
I failed to mention the 30b using the same hooks. I have a 30b with the same longer hook as the one most recently pictured. I still think everyone should be checking all three models that use the same hooks.
Tinman wrote:The Scammell and the Thames wreckers were introduced only months apart and ended production at the same time. They shared metal and plastic hooks. If a specific hook is found on one, it will also be found on the other. There is more than one size metal hook recorded in several catalogs. So either the various catalogs are wrong and their is only one size metal hook or there are shorter/longer hooks out there. People need to be checking all their 13c models as well (because if it's found on one it will turn up on the other).
Hi Joe, sorry, but I disagree with you, because 64a was put in production in March 1959, and 13c was put in production in June 1960, it is more then one year later. Meanwhile, there was a progressive developement in the technology. The hook biff rivet has been replaced with crimped dome head rivet and then with rounded dome head rivet by 64a. After this developement began the production of 13c and therefore there is no 13c with the hook biff rivet and probably no 13c with the crimped dome head rivet. The longer metal hooks (20mm) from 30b could be found on the later variations of 64a and 13c.
Antonin
Tinman wrote:The Scammell and the Thames wreckers were introduced only months apart and ended production at the same time. They shared metal and plastic hooks. If a specific hook is found on one, it will also be found on the other. There is more than one size metal hook recorded in several catalogs. So either the various catalogs are wrong and their is only one size metal hook or there are shorter/longer hooks out there. People need to be checking all their 13c models as well (because if it's found on one it will turn up on the other).
Hi Joe, sorry, but I disagree with you, because 64a was put in production in March 1959, and 13c was put in production in June 1960, it is more then one year later. Meanwhile, there was a progressive developement in the technology. The hook biff rivet has been replaced with crimped dome head rivet and then with rounded dome head rivet by 64a. After this developement began the production of 13c and therefore there is no 13c with the hook biff rivet and probably no 13c with the crimped dome head rivet. The longer metal hooks (20mm) from 30b could be found on the later variations of 64a and 13c.
Antonin
I thought we were primarily talking about hook lengths and c/a models with plastic hooks and not the method that secured the hooks. Either I have lost my way on the discussion of the thread or I have failed to grasp the intent of the discussion. Sorry.
1). I want to mention, Nick's guide has a typo in the photo for this model which labels the 20 mm plastic hook as 18 mm in length (even though you can clearly see it's longer).
2). I like the idea of getting the method of securing the hooks cataloged.
3). I agree that the hook which John boy shows us is hardly worth attempting to catalog (for most of the reasons mentioned).
This brings us back to the question of a 20 mm metal hook, does it exist or is it just an error that's been carried over from guide to guide?
