You are doing a great job in explaining the process of making one of these jet engines. Up until now, I had been intimidated at the mere thought of making one. I hope you and your family have an incredible holiday season together.
The maths is a bit of a head ache but I do appreciate the way you keep the layout simple, ie; a bit of paper. This keeps it within the scope of most home gamers rather than needing ludicrously expensive gauges or other bits of kit. It certainly gives people of my skill level the motivation to try these things.
A trick to remember when working with circles is that all your measurements are "times pi". If you just keep that in your head and don't actually do it your calculations become much simpler. In your case the 40mm diameter is 20mm radius, 20 squared is 400, 30% of that is 120, divide by 24 holes is 5, square root is 2.236 radius, 4.472 diameter for the primary hole size. You only need to use pi when you are converting to something that isn't a circle, otherwise just keep it in your head to remind you to get one for supper.
1:27 John, it looks like pressing Conv + will get you the full value of pi for that calculator. Never seen one of those before ! I take it all the data is for working with cast iron - since it has CI on it ;)
At a glance, it reminds me of an industrial heating nozzle, which I guess it is? With a higher velocity of boost? Suppose you could make it smaller and have a flamethrower, with the correct stociametric mixture. Love your engineering skill Sir.
I use a carbide centre drill for stuff like stainless, followed by Cintride or Cobalt drills run fairly slow with plenty of cutting paste like Rocol, or flood coolant. Stainless is a nightmare once it starts to harden during machining.
Nice one John! That stainless looks to be a right bastard to work. It's lucky you had the carbide ball end mill mate or you would have been in a wold of shite otherwise lol I hope you and Debs had a good Christmas and Happy New Year to you both for Saturday.
G'day mate, hope you had a Merry Christmas and please, a happy new year to you and yours. Enjoy your work very muchly. From what part of England do you hale? Your accent sounds wonderful to me. Thanks.
Hi John. The word you are looking for is Tertiary. Pronounced Tershiary. Merry Christmas and a Happy New Year.
Terr-sherry. Like Terry's Sherry, but once you've had a few too many yaself.
You are doing a great job in explaining the process of making one of these jet engines. Up until now, I had been intimidated at the mere thought of making one.
I hope you and your family have an incredible holiday season together.
The maths is a bit of a head ache but I do appreciate the way you keep the layout simple, ie; a bit of paper. This keeps it within the scope of most home gamers rather than needing ludicrously expensive gauges or other bits of kit. It certainly gives people of my skill level the motivation to try these things.
A trick to remember when working with circles is that all your measurements are "times pi". If you just keep that in your head and don't actually do it your calculations become much simpler.
In your case the 40mm diameter is 20mm radius, 20 squared is 400, 30% of that is 120, divide by 24 holes is 5, square root is 2.236 radius, 4.472 diameter for the primary hole size.
You only need to use pi when you are converting to something that isn't a circle, otherwise just keep it in your head to remind you to get one for supper.
Took me a while to get my head around that, but yes, indeed.
Always a pleasure catching your work on Sunday evening. The best to you and yours. Thanks for the look!
Nice work. Looking forward to he next part.
Thanks John
So looking forward to this keep them coming john.
1:27 John, it looks like pressing Conv + will get you the full value of pi for that calculator.
Never seen one of those before !
I take it all the data is for working with cast iron - since it has CI on it ;)
Put the calculator on your cellphone than turn it sideways and you got one...
@@kentuckytrapper780 yep that's what I do too!
@@kentuckytrapper780 Not sure what you're trying to achieve with that ??????
@@millomweb you get a machinist calculator when you turn your phone calculator on it's side
@@kentuckytrapper780 I don't !! I just get a phone turned on its side !
Great video John, keep'um coming..
Tertiary ... turshary
Merry Christmas, all the best for 2022
At a glance, it reminds me of an industrial heating nozzle, which I guess it is? With a higher velocity of boost? Suppose you could make it smaller and have a flamethrower, with the correct stociametric mixture. Love your engineering skill Sir.
Nice job John…
I use a carbide centre drill for stuff like stainless, followed by Cintride or Cobalt drills run fairly slow with plenty of cutting paste like Rocol, or flood coolant. Stainless is a nightmare once it starts to harden during machining.
Can't beat a bit of workshop maths John.
Looking good.
Nice one John! That stainless looks to be a right bastard to work. It's lucky you had the carbide ball end mill mate or you would have been in a wold of shite otherwise lol I hope you and Debs had a good Christmas and Happy New Year to you both for Saturday.
Looking good - great idea using the ball end mill. Stainless is a pain to drill.
Wasn't it a bell end mill? 😺
Love your vids,especially the jet ones.What fuel will you use,propane/paraffin ?
Nice one John.
I see the dinosaur is back making an appearance 👍
Saludos desde Colombia
stick a rotary table on the plasma and run is as one of the axis
Hey! Nice video!
Do the maths are the same for a axial compressor gas turbine?
Dilution holes are 'tertiary' pronounced tershi ary
Could you have done this faster by using your plasma cutter and just rotating the pipe?
G'day mate, hope you had a Merry Christmas and please, a happy new year to you and yours. Enjoy your work very muchly. From what part of England do you hale? Your accent sounds wonderful to me. Thanks.
John is from Newcastle a true dyed in the wool Geordie, and a great bloke!
brill
Tertiary, pronounced “tershary”
Jet guys would call this a combustor liner :)
Ter-shur-ree tertiary
Pye R squared isn't the same as pye R x2 though, it's nearer 39 than 12 ??
If r is 2 (as in a 4cm bore) then r^2 is the same as rX2 or indeed r + 2. In any case it comes out as 12.56637....
@@BensWorkshop It only works that way with 2
That tube looks a lot bigger than 4cm, when john puts his hand over the end of the tube it looks to be about 60 to 65 mm. 28.2 cm^2 to 30.66 cm^2
@@july8xx Correct.
@@july8xx The 4CM bore is the bore of the compressor impeller not the fire tube. (Inlet of the trubo)
Everyone is now doing calcs in their vids. I have started a trend. Grest work. Is it stainless exhaust tube you are using?
Did you watch it on silent or something? John clearly stated it was stainless about three or four times lol
@@samrodian919I was asking if it was exhaust tube, a specific item.
Yes stainless exhaust tube nothing fancy mild steel will work as well
@@doubleboost Thank you for that.
@@carlwilson1772 in that case my apologies