PenrithBeacon

Too true!

Long haul flights are pumping an enormous amount of nasties directly into the stratosphere. We need to stop burning stuff for energy, fossil or otherwise.

A bit of thread creep, but might be of interest https://www.theguardian.com/environment/2021/nov/05/british-firm-to-unveil-technology-for-zero-carbon-emission-flights-at-cop26?CMP=Share_AndroidApp_Other

Presumably to be replaced with a lorry carrying nitrogen cylinders?

That's interesting! From this book the wheelbase of the 48DS is greater than the track gauge I have one of these in store perhaps I need to measure it up Edit: I just noticed that David's post is really referring to 'BtoB' which I think is 'back to back' not 'wheelbase'

I agree with you, but he, and the rest of us, are allowed the occasional mistake! One thing, where are JCBs refuelled? I've never seen one at a petrol station; might there be supply chain issues with hydrogen powered civil engineering vehicles?

The wheels will get 'cross cornered' on the track and the vehicle won't move. Why is this so clear to me and not to others?

Bamford made his name as an innovative capitalist, so why can't he do it all over again?

The chimneys for the Ivatt and Riddles Class 4 Moguls are very different. The Ivatt had a chimney very much in the style of Stanier with the Riddles drawing their heritage from the LYR. As did the rest of the BR Standards. You might find that the Ivatt had the same chimney as the Black 5 and 8F, but I don't actually know. It definitely isn't the same Stanier chimney as fitted to the 4F or the 2P. Possibly worth exploring.

Do it then!

I'm not talking about the 48DS but the post war Sentinel.

I'm surprised that it isn't obvious that the wheelbase has to be greater than the track gauge. I'm sure that it can be shown that this is true but I don't have the references to hand. I dare say that some RMwebber does have though. IIRC the GWR had a broad gauge horse box that had a wheelbase of 6'-6" and that vehicle always had to be marshalled with other vehicle behind and in front because it was wildly unstable otherwise.

The problem here is due to rendering the the prototype in P4 or 18.83. The wheelbase of the prototype is 4'-9" (19mm) on a track of 4'-8.5" (18.83mm) leaving the P4 modeller with just 0.5" (0.17mm) to play with. It's fine in 00 because 16.5mm is playing 19mm, but I don't have the skills to work with just 0.17 mm. I decided to extend the wheelbase of the model to 20mm (5'-0") which would give me 1.17mm to work with a scratch built chassis. I got the wheelbase correct ok but got the side profile of the frames wrong. Pig's ear. I need to go again but not now, but thanks a lot for the offer, much appreciated.

I found that the swivelling arm had quite enough movement in yaw to enable compensation, although, as the proof of a pudding etc, the model still lies uncompleted. It, an RT Sentinel, needs a scratch built chassis for P4 and I made a mess of it first time around. Must get back to it but the mojo has gone. After reaming out the drive spur gears, I found it was necessary to drill and tap 1mm for grub screws to be sure of fixing to the axles. Said grub crews ar available on eBay with either a socket or slot for allen keys or screwdriver

https://www.theguardian.com/world/2021/nov/03/jonathan-van-tam-voices-concerns-over-increasing-covid-death-rate This a concern, I'm thinking quite seriously of opting out of model railway shows, where previously I was pretty optimistic

I believe that's an Ivatt 2 not 4. I don't think a chimney for the Ivatt 4 is available.

I have, so far, attended three shows, Cotgrave, Farnham and Uckfield. I tried to get to the Exmoor show last weekend but, because of delays, arrived as they were packing up! The fish and chip takeaway resolved any disappointment. The experience was a little mixed, the Cotgrave show was so badly attended that social distancing wasn't an issue, Farnham was generally fine and Uckfield wasn't at all enjoyable because of overcrowding. Mask wearing was patchy as I think most people share my experience of masks. My glasses steam up and the masks get very wet. Although Uckfield was plastered with signs telling people to wear masks most people, including the restaurant staff, weren't and social distancing was impossible. My next show is Tolworth I'll see how that goes. Ever hopeful.

The conversation on here was about the use of hydrogen in cars. Some people seem to think it will be stored on board in gaseous form which I think is hopelessly impractical and I have asked for online links for this to clarify. So far there have been no offers I have provided two links to the use of hydrogen in liquid form which I think is the better option. If anyone disagrees please can they provide links to support their view. Thanks

OK so you're not able to provide a link about these machines work and the onboard storage of the fuel.

https://www.matfoundrygroup.com/News and Blog/Is_the_Future_of_Automotive_Nitrogen_Cars I cannot find an online reference to gaseous nitrogen engines, only liquid nitrogen engines. That is to say that the fuel is stored on board in its gaseous not liquid state and then input to the engine in its liquid form. If you can find such a reference I'd be grateful if could share it.

I thought that was implicit in the conversation as it's not to obvious to me how you'd fill up at a roadside filling station with a gas and not a liquid. Clearly there is something I'm missing, please tell me!

https://en.wikipedia.org/wiki/Liquid_nitrogen_engine This site directly contradicts this statement, as do others. 'One advantage of the liquid nitrogen vehicle is that the exhaust gas is simply nitrogen, a component of air, and thus it produces no localized air pollution in the tailpipe emissions'

https://en.wikipedia.org/wiki/NOx I can't say I understand most of this

The impression I have is that burning hydrogen gives a lot less NOX than burning fossil fuel.

https://www.amazon.co.uk/Western-Central-Railway-Oakwood-Library/dp/0853616531/ref=sr_1_1?dchild=1&keywords=Great+Western+%26+Great+Central+Joint+Railway+by+Stanley+C+Jenkins%2C+Oakwood+Press&qid=1635585033&sr=8-1