Member postings for Bev Archer

First off my apologies but I have been offline due a lightning strike taking out our broadband yesterday. Openreach have just finished fixing it.

Martin: I'm not sure about the "astute" bit - there's a hell of a lot of dross that I'm trying to sort through!

Tim G: the scale is fixed to, and moves with, the plunger. I made a small video but can't see how to attach it to my post.

MichaelG: Thanks for the info but I'm not sure what the spacenet link is telling me about this instrument.

Howard: Thanks for your info. I can't see it as anything other than a "go/no go" gauge.

Anybody got any links to a German forum that may be able to shed some light (I'm grasping at straws here)

old mart: Thanks for the offer, any source of info is welcome.

Martin: As you can see it bears a "cast in" HuK, Stuttgart logo, the stamped letters D.R.P. and a stamped triangle ( the letters under the J are WECO. Perhaps you can decypher.

My cousin worked for a company producing coatings for wood furniture, based in Salford. He travelled as a techniclly rep. nationally and abroad. He could have picked this item up anywhere.

Bev

Its past my bedtime now but I'll answer these tomorrow. Us octagenarians need our kip

Thanks for that Martin. TheThe setting tool is in fact a hollow bar measuring 15.00mm diam. This instrument was part of a consignment of tools that I inherited from my late cousin who was a keen model engineer and an inveterate collector of tools , new and old. The word magpie comes to mind. I can't think that I would have any use for it so will probably Freecycle it along with other unwanted items.

Bev

Can anybody tell me how to read this micrometer?


It's made by Hahn & Kolb and has Nr.1731 stamped on it plus Messbereich. 10-20 (measuring range). My main problem is with the spring loaded plunger, with the graduations marked on it, which doesn't seem to connect to the moving spindle.

Oops! Its a K&B Torpedo not a Hornet.

Bev

Hi Folks,

Back with my K&B Hornet 15 model aero engine. Thanks to JasonB & Nick I've resolved most of the screw thread queries but the last one really has me puzzled.

The Spraybar of the Needle Valve Assembly is a brass tube with an external thread. The major diameter , as measured, is 0.138" or 3.54mm but I've been unable to ascertain the pitch as non of my thread pitch gauges cover it. It appears to be between 36 & 40 tpi or 0.6 - 0.7mm. These measurements seem to indicate 4BA but whilst a 4BA nut is a slack fit on the spraybar, the locknut from the NVA is too small to fit on a 4BA machine screw. Also, what would a BA thread be doing on a 1950s American engine? Unless of course my dad swapped the original NVA for a British one.

Anyway, I hope somebody can cast some light on the dark shadows of my ignorance. I'll be glad when I get onto the British engines, at least I'll recognize the threads there (I hope!)

Cheers

Bev

Many thanks to JasonB & Nick. I've now ordered taps and a die. When I get these engines finished I'll post some photos (when!!)

Bev

Hi,

My first posting on this forum. I'm trying to restore some fairly old model aero engines that I inherited from my dad. The first one I've tackled is a K&B Torpedo 15 and I'm puzzled by the threads on the head and cylinder retaining bolts. They appear to be 7/64" and 40 tpi. I suspect this is a Model Engineer Screw Thread but none of the tables I've looked at go below 1/8". Did American manufacturers use the M.E. thread?

Would anybody know what this thread is and is it possible to get taps and die to suit?

Bev