6.00x4 6pr Tyres Fitted To What Aircraft?

Member for

10 years 9 months

Posts: 1,744

Would anybody be able to tell me what aircraft a 6.00x4 6pr tyre would originally have been fitted to? Slingsby used this on many of his sailplanes, but bought the rims and tubes/tyres from NOS, left-over from WW2. I have seen references to Supermarine Walrus, but not much more. What other aircraft would have used these as tail wheel tyres? This should push me in a general direction to find used servicable examples for some vintage gliders...

PS: 6.00x4 12pr has been used on Jet Provost nose wheels, but they are unusable for sailplanes due to high plyrating causing high landings loads on structural glue joints...

Original post
Profile picture for user Air Ministry

Member for

12 years 1 month

Posts: 1,695

Try checking the rear ends of any Blenheims, Lysanders, Typhoons, Whirlwinds, Walrus, Albacores or Fireflys that you come across.

Member for

13 years 4 months

Posts: 8,856

Nearest I found was a 5.50 by 4 6 ply and that's a Beaver tailwheel

Member for

10 years 9 months

Posts: 1,744

Try checking the rear ends of any Blenheims, Lysanders, Typhoons, Whirlwinds, Walrus, Albacores or Fireflys that you come across.

That is very helpful, AM. Do all of these have the 6.00 by 4? Or just certain marks? (I'll have a bit of a hard time finding back ends of Whirlwind though!)

Member for

10 years 9 months

Posts: 1,744

Yes, they are impossible to get new. No demand. Latest production run I came across was 1973...

Member for

20 years 1 month

Posts: 9,780

I have a tailwheel that has been re stamped for use on a Slingsby - I will search it out.

Member for

8 years 3 months

Posts: 34

Twin pioneer Tailwheel tyres. The remaining stocks were hoovered up for a couple of Comper Swift replicas.
The closest useful tyre I have seen is a harrier outrigger tyre though it is a bit smaller and has a higher ply rating. Might work for a glider though.

Member for

10 years 9 months

Posts: 1,744

Twin pioneer Tailwheel tyres. The remaining stocks were hoovered up for a couple of Comper Swift replicas.
The closest useful tyre I have seen is a harrier outrigger tyre though it is a bit smaller and has a higher ply rating. Might work for a glider though.

A good lead too, that Twin Pioneer. Problem with higher plyrates (and increased stiffness) is the higher loads on airframe glue joints. Heavy landings especially are an issue, and can then more easily result in structural glue joint damage, which can be very hard to spot. The Aerolite glue used in the gliders in question is much better than the Kaurit or Casein glues, but still susceptible to failures. It is starting to become a widespread issue in the maintenance and conservation of vintage gliders, often requiring the rebuild of substantial airframe sections.

Member for

10 years 9 months

Posts: 1,744

I have a tailwheel that has been re stamped for use on a Slingsby - I will search it out.

That would be good, David. Thank you.

Profile picture for user Air Ministry

Member for

12 years 1 month

Posts: 1,695

Hi ericmunk,

My AP is a mid-war one so I can only speak about 1942-ish with confidence.

I would think the tailwheel size/tyre remained the same for most of those types, except maybe the Firefly - it seems to have had several combinations of mainwheel and tailwheel as the airframe was developed. You'd have to consult the Vol. Is. They have quite a few at Kew.

Member for

10 years 9 months

Posts: 1,744

Hi ericmunk,

My AP is a mid-war one so I can only speak about 1942-ish with confidence.

I would think the tailwheel size/tyre remained the same for most of those types, except maybe the Firefly - it seems to have had several combinations of mainwheel and tailwheel as the airframe was developed. You'd have to consult the Vol. Is. They have quite a few at Kew.

Thank you, AM. The list of types should give me a general direction in which to look.

Profile picture for user Beermat

Member for

10 years 4 months

Posts: 3,441

Whirlwind is 5.5 by 4, as per DHC Beaver (and b*gg*r-all else).

Want to see the back end of a Whirlwind? Come to our AGM ;-)

Member for

10 years 9 months

Posts: 1,744

Whirlwind is 5.5 by 4

In that case I have a bit of Whirlwind here of my own, a 5.5x4 (which admittedly came from a DHC-2 judging by the production date).

Profile picture for user Beermat

Member for

10 years 4 months

Posts: 3,441

Ohh.. just the tyre? Is it circular or square section?

Member for

10 years 9 months

Posts: 1,744

Just the tyre, square anti-shimmy. Looks post-war too.

Profile picture for user Beermat

Member for

10 years 4 months

Posts: 3,441

Yeah, that's going to be Beaver, haven't found an anti-shimmy on a WW yet.

Looking at the Dunlop data sheet, the issue is that the 5007 wheel that was shared by all the aircraft types AM listed fitted both a 6x4 and 5.5x4 tyre. Apart from the WW, I don't know which had what?

Member for

10 years 9 months

Posts: 1,744

Nope, neither do I. I have two servicable 5007 wheel rims with bearings though, so that's covered for the current restoration. They too are pretty hard to find in working order.

Profile picture for user Beermat

Member for

10 years 4 months

Posts: 3,441

Indeed.

The 6 x 4 was 15 to 15.5" diameter , to the 5.5 x 4's approximately 14", so the difference might be visible in photographs?