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Old Sep 23, 2012, 04:29 PM
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Hi,

I don't remember if I've posted this before, but does anyone recognise this NVA...?

It's been living in my box of bits for ages, and I don't have a clue what make it might be....

Last edited by Gluehand; Sep 23, 2012 at 05:15 PM. Reason: Wotsit....
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Old Oct 07, 2012, 02:23 AM
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Quote:
Originally Posted by Gluehand View Post
It's been living in my box of bits for ages, and I don't have a clue what make it might be....
The mystery is solved!
In case anyone is interested to know, this NVA is Hungarian, and was fitted to the "VT-8", or "Aquila Baby" family...R/H photo shows a "VT-12", i.e. the geared marine version of Aquila Baby....

Old Oct 07, 2012, 04:09 AM
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Quote:
Originally Posted by Gluehand View Post
The mystery is solved!
In case anyone is interested to know, this NVA is Hungarian, and was fitted to the "VT-8", or "Aquila Baby" family...R/H photo shows a "VT-12", i.e. the geared marine version of Aquila Baby....

Yes its is Aquila Baby here's a picture of mine same needle
Old Oct 07, 2012, 02:37 PM
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I have the VT8 with the same needle. Pretty motor with red anodizing. Piston has a brass button on top that I think holds the piston to the con rod .

Mike1484
Old Oct 10, 2012, 08:06 PM
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Have been lucky enough to pick up TWO DC Spitfire/Sabre crankshafts. Thx S.
That lucky find gave me a good Sabre to go into a FF model.

Now I need a good DC Sabre 1.5 diesel piston and liner including the conta piston, and a gudgeon pin if available.....guess I can make that from a drill bit though, for the rest of the bits I have.
Old Oct 10, 2012, 08:18 PM
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Good Better Best quest.
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Try bearing service for needle rollers we used to be able to buy them in 0ver sizes also ie +.003'' diam ect.
Old Oct 10, 2012, 10:21 PM
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Try bearing service for needle rollers we used to be able to buy them in 0ver sizes also ie +.003'' diam ect.
Will remember that clue. Thanks. Only need piston and liner now.
Old Oct 27, 2012, 06:13 PM
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Badly wanted:
A sound Frog 50 backplate, to finish a 'project'....

Offer:
(The remains of) a very early "short head" Frog 50, as recently discussed in the diesel thread. The comp.lever seems to be the rare "first" version, seen on early ads...
Parts as per the photo below.
3 crankcase lugs of 4 are open (maybe a good idea to mill them off entirely & use a radial mount?)
Broken backplate lugs.
Fins a bit tatty (although fixable)...
Piston/liner unit is worn, but I think we've still got a runner, of some sort....

Trade for something "interesting", preferably including a backplate as mentioned above...I would value a backplate high, in this trade.....
Should a BP be included, I also send the radial mount backplate, as seen on the second photo....if not, unfortunately I'll need it....

I've already got 3 Frog 50's, coming well together....this would have been the 4:th......but I've decided to stop the madness at 3....

Last edited by Gluehand; Oct 27, 2012 at 06:34 PM.
Old Oct 28, 2012, 06:45 PM
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Barbini B 38 needle valve dimensions needed please.
Can anyone tell me the thread details and the lengths and diameters of the actual needle so I can make one for a friends engine.
He's in the States and I'm in Australia.
Cheers John
Old Oct 28, 2012, 07:51 PM
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Could you use this, John ?

Last edited by Gluehand; Oct 28, 2012 at 07:57 PM.
Old Oct 29, 2012, 07:19 PM
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Could you use this, John ?


Brilliant Sir, many thanks indeed. Just what the Doctor prescribed!
Old Aug 28, 2013, 11:39 AM
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I realize this thread is almost a year old, but I figured my request belonged here, so here it is.

I purchased a used OK Cub .074 diesel a little while ago, and recently found some time to look it over. Turns out, the tip of my needle valve is broken off. So I'm looking for a replacement. Anybody know where I can track one down so I can get this old classic running again soon? Thanks!
Old Aug 28, 2013, 12:52 PM
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KnifeEdge51, your needle is (probably) designed that way.
When checking my OK Cub 049B needle, the tip is "missing" as well...i.e. there is a taper, but the last "sharp point" is missing, and I cannot recall having seen an OK needle looking different...

I have no more engine to compare with, but maybe some OK owner out there would check & confirm......
Old Aug 28, 2013, 06:48 PM
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I'll try to get a few photos up in a bit, but I don't believe mine is in "good health." It appears the needle is straight until it steps down to the actual portion that should taper. There, there's just a nub left, and it appears that the tip if the needle may be in the old fuel line attached to the engine. We'll see what the pictures show and what others may think. I suppose you could somehow be right, but I've never seen a needle made quite like this one, if you are!
Old Aug 29, 2013, 02:07 AM
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Sticks, Tissue & old Diesels
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Yeah,
I like OK Cubs and I have several.
Most of the operational Cubs around today are from the "revival" engines built by Ted Brebeck through the nineties and maybe later.
One minor problem is the blunt needle end. The taper is definitely insufficient.
Actually, providing you know about it, it's no great problem. It just means that the range of needle adjustment, for running, is very small, i.e. the engine runs great providing the needle is just right. If you're half a turn away from the setting, it won't run at all after the prime has burned off.
I like them. To be honest, I hate the inaccessibility and unpredictable characteristics of the reed-valve Cox engines, and I prefer the OK Cub, with its accessible carburettor, even with the blunt needle.


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