BR Standard class 6 No. 72010 'Hengist' and Clan Discussion Thread

Any intention to build the Clan with Caprotti gear then guys?

 

Funny you should mention that, got my copy of Great Western Echo today & it says the delivery of the driving wheels has been delayed & may set the project back nine months.

 

Looks like they are already cast (Hooray).
Still worth looking into the use of the pattern if it survives. (guys ?) and if it could be suitably 'Modified'.
Dont know the full story but a year lead time doesn't inspire ...

 

There is a picture of the County's wheels in the new HR, and as the GW Echo says, there are (or were fairly recently) still bits to be added to them. Be interesting to see if they've finally made it to Didcot in two weeks time at the railmotor launch weekend

 

Er, no I don't think it was, just checked back in my 'combine' and I never saw 72008, just 72005, 72006, 72007 and 72009. Thanks for the photo anyway.

Cheers
Dave

 

i have a picture of the county wheelsets from when they were at south devon, arnt they 6 foot 9 anyway?

 

They are going to have a major problem if they've made them 6'9" They are supposed to be 6'3".

Oh, hang on, maybe that's why the suppliers are scared to deliver them... "sorry guv, that definitely looks like a nine the way it's written there, have a look for yerself" :doh:

 

The Hawksworth 'County' class engines had 6'-3" drivers, 21 spokes, 30" stroke with the crank pin in between spokes and rectangular section rims. The BR 8P, Britannia, Clan and Class 5 engines shared the same drivers ie 6'-2", 20 spokes, 28" stroke with the crank pin in between spokes and 'bevelled' rims. The source for this info is 'Wheel Specifications for the Modeller', Mike Sharman, OPC 1978.

If the info is correct, and I believe it to be so, there isn't the slightest chance that the pattern for the Didcot 'County' can be used for the 'Clan'.

Regards

 

Are the plans for this engines boiler to be rivited or welded?

 

Whats an extra spoke between friends ?, can put the Bevel in no problem,( wheres me file ?) and sure we can move the crankpin in an inch.... pulling your Leg thanks Orion for saving me the digging....

 

The inception was that the boiler would be as ordered by BR in Batch 242. As indeed the whole locomotive was intended.
Whether any of this will change may be a topic of discussion at the AGM, not for the present time.
Though I am certain that there will be a wealth of opinion about that subject amongst the members/contributors on this forum.
(There usually is, about everything!!).............................................(That's the idea of a forum isn't it?)

 

i say make it to the highest spec to prove how good it could be........
btw when is your agm, i may join just to support your project

 

September is AGM month I believe, though I could be wrong, not having managed to go to any yet. We'll accept anybody's money, [oops, that should be 'support'] so don't worry............

 

You're most welcome!

Regards

 

I think you'll find all the BR Standards share the Ivatt wheel design concept that was derived from Stanier's. The design philosophy of that to be fitted to the Std 3 is identical to that of the Ivatt 4. Different in axle diameter and number of spokes but all the same design concepts. Go check it out at Highley.

 

The Stanier wheels for the LMS were very different from Collett's or Hawksworth's for the GWR. I believe they were so different that the pattern for the 'County' will not be used for 'Hengist'. Also you are wrong to suggest that the wheels for the BR3s and Ivatt/BR4s are identical. BR3 are 5'-3", 15 spoke, driving pin between spokes; Ivatt/BR4 are 5' 3", 16 spoke, driving pin between spokes.

Regards

 

Brian didn't say that the wheels are identical - he said

(emphasis is mine)


Keith

 

As was mentioned by ghost, I didn't say the wheels were an identical design. I said they followed the same design philosophy. I.e near elliptical spokes and triangular rim etc. Further; you are incorrect in the number of spokes on a BR Std3 driving wheel. It has 17 spokes. You are welcome to check it out at Highley.

 

But if a pattern existed for ivatt/br standard 4's ...would it still be 'necessary' to produce a new one for standard 3 ? or only 'desireable' from an authenticity point of view... Could you even use the same tyres ? !.. standards schmandards

 

Your postulate never was considered. There was no surviving pattern for either the Std 3 or Ivatt/BR Std 4 before the driving wheel pattern for 82045 was started. The simple choice therefore was to make it correct or incorrect anew for the intended locomotive. I chose to do it correct to drawing (as we are trying to do with the rest of the locomotive) to avoid the wrath of the purists.
Although I haven't studied the drawings for the Ivatt/BR Std 4 tyres I suspect there is a good chance they will be very similar to those for the Std 3.
The use of a wheelset from an Ivatt/BR Std 4 possibly also raises a question regarding balance. I'll let others more knowledgable than I comment on that.
But we digress from Hengist.