Search found 90 matches

by AMatthews
Fri Dec 30, 2022 9:01 pm
Forum: Live Steam
Topic: draught required for oil firing
Replies: 24
Views: 4312

Re: draught required for oil firing

Hi all, Yes, pressure recovery/diffuser efficiency is a very well-understood and quantized science in other fields. It does amuse me how, in America, the UK and Australia at least everything is so empirical compared with European countries such as France and Germany who had developed good mathematic...
by AMatthews
Tue Dec 27, 2022 6:46 pm
Forum: Live Steam
Topic: draught required for oil firing
Replies: 24
Views: 4312

Re: draught required for oil firing

Thanks guys,

All the info is much appreciated, I think I will go with the set-up that FMW did for a conversion.
Greg, the diaphragm plates would be the same as the diaphragm plates in a master mechanics smokebox I dare say the do influence gas flow within the smokebox.

Cheers,
Andrew
by AMatthews
Sun Dec 25, 2022 7:51 pm
Forum: Live Steam
Topic: draught required for oil firing
Replies: 24
Views: 4312

Re: draught required for oil firing

excellent!
Thanks for the info. That will put me on the right track now, sounds like a good Lempor will do the trick and provide plenty of draft and I've designed and made plenty of them, will just up the draft input factor.

Cheers,
Andrew
by AMatthews
Sun Dec 25, 2022 9:55 am
Forum: Live Steam
Topic: draught required for oil firing
Replies: 24
Views: 4312

Re: draught required for oil firing

Excellent ,
thanks for that Marty, any idea when that article was published? i got most live steam magazines from '66 to '84

Cheers,
Andrew
by AMatthews
Sun Dec 25, 2022 2:30 am
Forum: Live Steam
Topic: draught required for oil firing
Replies: 24
Views: 4312

draught required for oil firing

Hi all, First of all, A very Merry Christmas/festive season to all and a safe, Prosperous New year. Now my question relates to a bit of a rule of thumb I am trying to find, basically as a rule of thumb how much weaker or perhaps stronger do you need to make the draft of the average well-designed boi...
by AMatthews
Mon Nov 07, 2022 9:10 am
Forum: Live Steam
Topic: Rehabilitating British injectors
Replies: 25
Views: 7030

Re: Rehabilitating British injectors

Hi all, Just to let you know, the thread is not the British cycle thread usually used on British injectors, as that is a 60-degree thread angle it is actually British Standard Brass (BSB) which is actually a normal Whitworth thread at 55 degrees. A much more common thread in the UK and here in model...
by AMatthews
Thu Oct 20, 2022 12:46 am
Forum: Live Steam
Topic: Rehabilitating British injectors
Replies: 25
Views: 7030

Re: Rehabilitating British injectors

Hi all, I have not personally used Ted's techniques, but his injectors sure worked. sadly he passed way a couple of years ago. A total gentleman and very smart. He was involved in repairing the " chain home" radar during world war 2 in southern Britain. He lived only 5 minutes by car from ...
by AMatthews
Tue Oct 18, 2022 8:20 pm
Forum: Live Steam
Topic: Steam exhaust nozzle
Replies: 20
Views: 7989

Re: Steam exhaust nozzle

Hi Jos, I certainly agree that it is probably not the ultimate design, there is always room for improvement. Io think it is the ultimate solution would be very unscientific. I would be keen to hear your thoughts in what you may hypothesise is an improvement on lempor I may be able to implement it in...
by AMatthews
Wed Oct 12, 2022 6:57 pm
Forum: Live Steam
Topic: Steam exhaust nozzle
Replies: 20
Views: 7989

Re: Steam exhaust nozzle

Jos stated: "That is an opinion and not the result of proper scientific testing. Also the LemPor does not comply with the general ideas as taught in fluid dynamics!" And that is certainly the case, however you cannot deny, Jos, that the LemPor despite not being rigorously tested has proven...
by AMatthews
Wed Oct 12, 2022 12:28 am
Forum: Live Steam
Topic: Steam exhaust nozzle
Replies: 20
Views: 7989

Re: Steam exhaust nozzle

As many have stated on this forum, there are basically two ways to go. The LemPor Ejector is by far the more efficient and better front end, thermodynamically. A gain in drawbar horsepower of between 25-50% is to be expected depending on just how badly the original front end has been designed. Havin...
by AMatthews
Mon Apr 15, 2019 9:21 am
Forum: Live Steam
Topic: I'm just an operator
Replies: 22
Views: 13142

Re: I'm just an operator

Hi Anthony I think you sum up the whole thing just right. Each have their place and both places are just as important as one another. Your parts are magnificent you are to be congratulated on them. As a toolmaker & draftsman during my career having worked with both manual and CNC machinery I see...
by AMatthews
Tue Apr 17, 2018 8:12 pm
Forum: Live Steam Marketplace
Topic: WANTED: 1 1/2" scale 7 1/4" gauge locomotive
Replies: 6
Views: 5365

Re: WANTED: 1 1/2" scale 7 1/4" gauge locomotive

Thanks for that, have already sent off 3 emails, no reply to any and this was about 6 weeks ago.

Cheers,
Andrew