JHA (O&K) Improved CAD views

[Andy Dapol]

Here are the latest CAD view of the O&K version JHA.
A number of improvements and corrections have been made, notably the end slope of the side, the platform is now correct (slimmer), couplings corrected and internal detailing added.

[159220]

Andy Dapol Looking good! Has it now been confirmed what product numbers shall be what livery?
Only three minor comments.
The handlebars look a little over-scale? Are you planning to make these in plastic or separate etch?
There should be a more dominant crease along the wagon.
Bogie suspension seems to be different than prototype, yet shall say, likely CAD/angle viewing. Bogie suspension really stands out on the prototype as four sheets trapped in a frame.
Image attached.

[159220]

I wonder how this project is going. Saw EP at Warley, but never an update on here?

[Andy Dapol]

It's currently working through the usual processes. Decorated samples are due within the next 6 weeks.

[daz9284]

I have seen the decorated samples on the hattons website but i wonder if i have missed something. the original press release was for the currently liveried wagons which are in revised FY livery with a large blue band, whereas the decorated samples are of the oringinal livery which are mainly grey/silver with YEOMAN on the side.

[Andy Dapol]

IanS FYI, The correct livery is Grey/Blue and not sliver as you mention.

[IanS]

Hi Andy,

I stand corrected.

They always looked lighter and shinier than the contemporary 'Railfreight grey' and the 'natural metal' finish seemed to be the trend at the time, following the 59s and aluminium bodied wagons. So I figured the original JHA livery was FY 'silver and blue' like the 59s.
It was quite a while ago now though, and the things were moving quite well when I used to see them.

[Andy Dapol]

IanS
Hi Ian, more of an FYI than a correction , and you are correct a 'natural' finish was in vogue at the time. From the original specifications the actual colour was RAL 7001 cunningly described as 'Silver-Grey'! though it is a solid, rather than metallic paint.
Also worth note is that the early livery wagons underframe/bogies etc. were RAL Grey-Brown (A sort of dark Chocolate), whilst the late livery were black.
Rgds
Andy

[Andy Dapol]

Hi, Thanks for commenting. I will bring this to the attention of our marketing person.
For clarity, these are the part number assignments: ('Late' is of course the thick blue band livery with black underframe).

Dapol O&K JHA hopper master list
Batch	Part	Inner/	Running
	Number	Outer	Number	Livery
2018	4F-050-001	Outer	19303	Yeoman EARLY
2018	4F-050-002	Outer	19311	Yeoman EARLY
2018	4F-050-003	Outer	19306	Yeoman LATE
2018	4F-050-004	Outer	19313	Yeoman LATE
2018	4F-050-101	Inner	19335	Yeoman EARLY
2018	4F-050-102	Inner	19337	Yeoman EARLY
2018	4F-050-103	Inner	19349	Yeoman EARLY
2018	4F-050-104	Inner	19361	Yeoman LATE
2018	4F-050-105	Inner	19370	Yeoman LATE
2018	4F-050-106	Inner	19398	Yeoman LATE

[JeremiahBunyan]

Thank you Andy!

[daz9284]

many thanks andy, that is great. any plans in the near future for the ARC / Hanson / National Power JHA's?

[Andy Dapol]

daz9284 No worries Daz.
Re: the other wagons, as they are different types each would need to be considered individually. No promises at this stage though.

[daz9284]

shame. probably jumping the gun but what about box wagons Mendip JNA's, JYA's??

[daz9284]

Andy Dapol I hope you are well and keeping safe. I know that there will be a delay with the corono virus, but is there an update as to when the JHAs can be expected to be with retailers? many thanks, Darryl

[Andy Dapol]

Hi daz9284 There have been various difficulties recently due to the virus in China and the UK, however we have managed to overcome this by working closely with our factories to minimise impact on production. However this has required some changes in production schedules to suit. The JHAs are next in line after our Turbots. We still anticipate these to coincide with the class 59 release.

[daz9284]

many thanks mate. just upped my order of the with rails of sheffield. can't wait for them. before i start trying to modify one of your Freightliner HIA's into a MRL IIA, do you have plans to release them in the future?

[Andy Dapol]

Hi, Thanks for the suggestion. Nothing on the horizon currently, but if you start work, then someone will probably release one just as the paints drying

[daz9284]

Andy Dapol , hi mate, hope you and your family are doing and keeping well, as well as everyone at Dapol. Just wondering if there is an update on when the JHAs are due to arrive on our shores?

many thanks
Darryl

[Joel Dapol]

Hello Darryl, my apologies for the interjection. The JHA's are now complete, however, we are experiencing problems arranging reasonably priced container space coming out of China, especially on the run up to Chine New Year. Freight chances have gone up five fold and space is hard to book. As a result there is slight delay but hope to have them shipped soon after the return from CNY.

[steadfast]

Hi there Andy Dapol Joel Dapol

I couldn't see a section for the JHAs in the N gauge section so here we go.

Despite being an N gauge modeller, I've purchased a 4mm model of the JHA and on the whole think it's a cracking model, capturing the shape well of a prototype I am very familiar with that I am around most days working on the real railway.

One thing that has jumped out is that there is a discrepancy between the position of the yellow axlebox on the bogies and the actual position of the axle, whereby the axle doesn't align correctly and there is too much wheel visible below the bogie sideframe. Seeing how the model has a flat floor, I presume this has been done to allow flange clearance? I see this has also been carried across to the CAD of the N scale models.

Looking at other wagons with a similar lack of flange clearance, the bottom of the wagon is cut away underneath to offer the greater clearance. On your own Ferry vans and IHA / KIA Tiphook steel wagons, the floor is flat and raised above the bottom of the solebars to give clearance . The Farish BDA wagon has semi circular cutouts in the floor, again allowing for the flange to be hidden withing the wagon body. Looking at the bogie rotation angles on the 4mm JHA, the flanges would not interfere with the body sides when at maximum rotation so this would not cause a conflict with the flanges of the wheels.

If it's not too late, please consider revising this on the N scale JHA model, as it makes the wagon proportions look off, and also presumably makes the wagon sit higher (as I have an inner wagon, I cannot measure buffer height). If the wagon height is compromised, it may consequentially look off mixed with other wagons or with locos, especially in N where long trains can be run.

All the best
Jo

[Andy Dapol]

Hi, yes it was. I had attempted to explain why the center does not align. when the bogie is dismantled or viewed without weight on the wheelset.
There is inevitable vertical play when the axle is fitted into the bearing cup. If centers of the cup were aligned with the (dummy) axlebox this would mean the wheelset sits too high when loaded. By positioning the center below the desired position, when loaded (placed on the track) the position of that wheelset is correct within the tolerances.

In OO the tolerance is a scale 3/4 inch, in N, a scale 1/3rd inch.

[woodbury22uk]

Andy Dapol I understand the fine dimensions we are working with here. Also I recognise that on a curve the wheelset moves in the bogie frame tilting the axle laterally making one wheel fractionally higher than the other as one pinpoint slides down the cup and the opposite side rides up the cup. Pleased that the axis of the cup will be no more than 0.06mm offset from the true axlebox centre on the N wagons. That will do for me.

[Andy Dapol]

No problem, glad to have helped.