Wickham Green 1,623 Posted November 9, 2018 Interesting. Surprised it never made its way into later Dapol OO gauge models nor even DJM ones. The factory is going to have fun fettling tungsten but the end result is a very solid chassis. I'm not sure what solid tungsten would be like to machine ........ but we're not ( presumably ) talking about tungsten carbide. Share this post Link to post Share on other sites
McC 616 Posted November 9, 2018 (edited) I'm not sure what solid tungsten would be like to machine ........ but we're not ( presumably ) talking about tungsten carbide. No, Tungsten Alloy. As well as being very tough and resistant to everything from temperature warping to chemicals, the key value is it's density (19.25g/cm3) which is only 0.05g/cm3 less than gold. Meaning you can have a very heavy, stable chassis, without taking up lots of volume (leaving much more room inside for details, speakers, capacitors, etc). Edited November 9, 2018 by McC 5 2 Share this post Link to post Share on other sites
Wickham Green 1,623 Posted November 12, 2018 No, Tungsten Alloy. As well as being very tough and resistant to everything from temperature warping to chemicals, the key value is it's density (19.25g/cm3) which is only 0.05g/cm3 less than gold. Meaning you can have a very heavy, stable chassis, without taking up lots of volume (leaving much more room inside for details, speakers, capacitors, etc). Yep ! - "50% more dense than lead and over twice the density of steel!" according to one manufacturer's website .... the alloy would probably be in the region of 90-95% tungsten so melting temperature ridiculously high and sintering would be the only economical option for 'our' application ! ( Doesn't sound cheap ! ) Share this post Link to post Share on other sites
D6975 218 Posted November 26, 2018 (edited) The livery descriptions are a bit vague on some of the later models, no mention of whether they have the white lining or are just black/orange. Edited November 26, 2018 by D6975 Share this post Link to post Share on other sites
McC 616 Posted November 26, 2018 The livery descriptions are a bit vague on some of the later models, no mention of whether they have the white lining or are just black/orange. Hi D6975, Yes we're very aware the decoration and livery data is weak at the moment, Warley and our Deltic launch impacted getting this online - but it will be up there asap! Where possible, each version includes a photo also of the prototype in the listed livery, and as always, any questions just let us know! Share this post Link to post Share on other sites
Philip Jackson 98 Posted January 11, 2019 oh go on then . I just placed an order for the 054 - A Class Locomotive Share this post Link to post Share on other sites
Robert Shrives 566 Posted January 11, 2019 Good for you , I have two on order ! one for each foot .. Livery details greatly updated by the way. Looking forward to hearing on progress after Chinese new year. Robert Share this post Link to post Share on other sites
Accurascale Fran 4,510 Posted April 2, 2019 (edited) Hi everyone, Here is sneak peek at the design for the internals of the the A. Here you can see the heavy chassis block, large central can motor with twin fly wheels and circuit board. This work has been approved and tooling of the chassis components is well under way! Exciting times I'm sure you will agree! Cheers! Fran Edited April 2, 2019 by 071 11 1 2 Share this post Link to post Share on other sites
ayrmrg 190 Posted April 2, 2019 Hi Fran Looking at your excellent pictures. Can I please ask what is the provision for fitting sound speakers? Is it below the small meshed fan? I ask, as a friend has a few of these on order and it's me that will get landed with fitting the sound trickery. I plan to use two i phone 6's. If that's any help. Best Regards Stephen Share this post Link to post Share on other sites
Accurascale Fran 4,510 Posted April 2, 2019 52 minutes ago, ayrmrg said: Hi Fran Looking at your excellent pictures. Can I please ask what is the provision for fitting sound speakers? Is it below the small meshed fan? I ask, as a friend has a few of these on order and it's me that will get landed with fitting the sound trickery. I plan to use two i phone 6's. If that's any help. Best Regards Stephen Hi Stephen, Thats correct. Plenty of room for them there and a big EM2 type speaker if that takes your fancy! Cheers! Fran Share this post Link to post Share on other sites
ayrmrg 190 Posted April 2, 2019 Hi Fran Thanks for the prompt reply. The image is deceptive. I thought I'd maybe struggle to get two i phone 6's in. My friend will be over the moon with an EM 2. Regards Stephen 1 Share this post Link to post Share on other sites
The Stationmaster 81,940 Posted April 3, 2019 As a matter of interest how does the motor keep cool - or doesn't it get hot? Share this post Link to post Share on other sites
Accurascale Fran 4,510 Posted April 3, 2019 1 minute ago, The Stationmaster said: As a matter of interest how does the motor keep cool - or doesn't it get hot? Hi Mike, They dont tend to get too hot, but there is space either side, above and below for heat to dissipate. It's the same as other proprietary diesel and electric locos on the market with central motors. Cheers! Fran 1 Share this post Link to post Share on other sites
Robert Shrives 566 Posted August 30, 2019 well this looks the part. https://irishrailwaymodeller.com/topic/7105-irm-a-class-our-first-locomotive/page/9 1 1 Share this post Link to post Share on other sites
Accurascale Fran 4,510 Posted September 30, 2019 A Class Pre Production First Look! Well folks, today is a very special landmark for us here at IRM, as we received the first pre-production prototype of our highly antcipated A Class! We've already given it a quick spin around our layout, and we are blown away by the crispness of the detail, the etched grills, the shape, and that performance! It's beautifully heavy and very very smooth! There are some snags required such as lighting functions, roof details and fit, but overall it is most encouraging! It will take pride of place on our stand at the forthcoming South Dublin Model Railway Show this October Bank holiday weekend, and GETS in a couple of weeks time, so make sure you drop by for a closer look. We will soon send our feedback to China and then get some firm delivery details. In the meantime check out this video and place an order if you havent already. These beauties promise to be special! https://irishrailwaymodels.com/collectio…/a-class-locomotive 15 1 Share this post Link to post Share on other sites
MGR Hooper! 1,759 Posted October 1, 2019 On 02/04/2019 at 21:33, Accurascale Fran said: Hi everyone, Here is sneak peek at the design for the internals of the the A. Here you can see the heavy chassis block, large central can motor with twin fly wheels and circuit board. This work has been approved and tooling of the chassis components is well under way! https://www.rmweb.co.uk/community/uploads/monthly_2019_04/09.JPG.1901bfa26fb1acbced0b1f095564d002.JPG https://www.rmweb.co.uk/community/uploads/monthly_2019_04/03.JPG.0c8e74c0b9c139f28b3760b357a539f3.JPG https://www.rmweb.co.uk/community/uploads/monthly_2019_04/04.JPG.9bd9b751db7645d10876650ccb88fc12.JPG https://www.rmweb.co.uk/community/uploads/monthly_2019_04/02.JPG.21f9b29fb3371f2e1e42a8f64f82028d.JPG https://www.rmweb.co.uk/community/uploads/monthly_2019_04/01.JPG.20740a02050b4516a6eeacc03e82bfc5.JPG Exciting times I'm sure you will agree! Cheers! Fran Stunning!!! 2 Share this post Link to post Share on other sites
NIRCLASS80 188 Posted October 1, 2019 Looks great and to consider that it is not even announced 12 months ago make it a fantastic achievement. Some of the established manufacturers would struggle with such a time frame and also the fact that so many other products are being designed and manufactured at the same time. Cheers lads and well done. 1 4 1 Share this post Link to post Share on other sites
D6975 218 Posted October 3, 2019 Looks brilliant apart from the windows - clearly some serious issues to be sorted there. Please don't rush, I've got several 121s to pay for sometime soon. Share this post Link to post Share on other sites
Accurascale Fran 4,510 Posted October 3, 2019 1 hour ago, D6975 said: Looks brilliant apart from the windows - clearly some serious issues to be sorted there. Please don't rush, I've got several 121s to pay for sometime soon. https://www.rmweb.co.uk/community/uploads/emoticons/default_biggrin.png Hi there, We have checked the dimensions of the windows and found them to be spot on. This particular one has the toughened windscreen, which As got later in life. We are also doing the original windscreens. The glazing itself will be improved too, but that's what EPs are for, to snag. Cheers! Fran Share this post Link to post Share on other sites
D6975 218 Posted October 3, 2019 It's not the shape of the windows, it's the glazing, the cabside windows appear as if they are melting (look at the bottom, it sticks out) and they all have a pronounced prism effect. Share this post Link to post Share on other sites
Accurascale Fran 4,510 Posted October 3, 2019 3 minutes ago, D6975 said: It's not the shape of the windows, it's the glazing, the cabside windows appear as if they are melting (look at the bottom, it sticks out) and they all have a pronounced prism effect. Ah yes, sorry, your first post was a tad vague. We are not happy with the glazing, but it has yet to be polished, hence this effect. An easy enough fix and will be much better on the finished models, so dont worry! The main thing is the shape and character is spot on, which is the most fundamental aspect. Performance is good too, as you can see in the below video, the capacitors will hold power for almost 10 seconds after removing the loco from the track! Of course our Deltic will have these electronics too, but more on that later Cheers! Fran 1 1 Share this post Link to post Share on other sites
No Decorum 1,388 Posted October 3, 2019 39 minutes ago, Accurascale Fran said: Of course our Deltic will have these electronics too, but more on that later Cheers! Fran Oooo! 1 Share this post Link to post Share on other sites
217 RIVER FLESK 51 Posted October 4, 2019 So just out of interest, what happens if you have a derailment & you're using stone age DC? You turn the power off, but does the loco just plough on until the capacitors drain? Does this equally apply to when trying to bring the loco to a controlled stop or are the capacitors only in circuit / functioning when operating in DCC mode? Share this post Link to post Share on other sites
Accurascale Fran 4,510 Posted October 4, 2019 1 hour ago, 217 RIVER FLESK said: So just out of interest, what happens if you have a derailment & you're using stone age DC? You turn the power off, but does the loco just plough on until the capacitors drain? Does this equally apply to when trying to bring the loco to a controlled stop or are the capacitors only in circuit / functioning when operating in DCC mode? Hi there, The capacitors will not function in DC mode, so you will be okay! There will be momentum from the flywheels etc so it will take a bit of skillful driving, but nothing too dramatic. Cheers! Fran 1 Share this post Link to post Share on other sites
AY Mod 8,714 Posted October 10, 2019 Phil and I met up with Patrick and Fran today and we had chance to give the A Class a good look over and a run. It's probably the best quality D/E loco I've come across in any marketplace. The mass and performance is impressive, silky smooth and virtually silent. It really bodes well for the Deltic in that respect. 4 3 Share this post Link to post Share on other sites
