Author Topic: air engine (Read 19388 times)

krv3000 · « **on:** February 22, 2014, 03:45:43 PM »

hi all just started me new engine its based on a air cylinder that i got from work its 37mm long by 25 square the first job was to fill in the threw holes that went threw it i filed them with that two part epoxy putty once hard direst it off flush then started work on the valve body i had a lump of bronze that wood do the job i set it up in the lathe and turned it dawn to 37mm the depth of the block is 45mm the cylinder has two holes in it for air in and out so first job was to mack them out on to the bronze and drill them their 4mm then marked up and drilled m3 for the valve ports then from both ends drilled m3 to link up the port hole and the valve port then started work on the valve chest this is made out of brass 20mm deep by 37mm long by 13mm thick from the face 8.5mm up then drilled both ends 7.6mm for the gland and tale support made the gland out of bronze 8mm by 10mm with a 4mm step to go in to the valve chest this was drilled all the way threw 2.8mm then reamed m3 for the valve rod then drilled m5 by 8mm deep and then taped m6 right pics

Stilldrillin · « **Reply #1 on:** February 22, 2014, 03:51:18 PM »

This will look classy, when you've done Bob!

Good luck.....

David D

AussieJimG · « **Reply #2 on:** February 23, 2014, 04:39:00 AM »

Your work is always worth watching Bob.

Jim

krv3000 · « **Reply #3 on:** March 02, 2014, 05:47:56 PM »

hi all well i finished of the valve chest i drilled the center then cut it out then filed it then drilled it and the chest cover and valve block 2.1mm then drilled the cylinder 1.6mm then taped m2 i got mick to order me sum 2mm threaded rod of the net cut the rod over size then bolted the lot together all looks well next to do is the valve valve nut the Cross head crank shaft any way sum pics of the work dun so far and a pic of the piston

krv3000 · « **Reply #4 on:** May 02, 2015, 06:46:18 PM »

hi its bin a long time a go when I started this engine but with the whether piking up a bit I have dun a bit more to it I marked out the base for the cylinder to go and where the bering post's to go and drilled them made up the two bering post's they where 15 mm thick but I have slimed them dawn to 12.5 mm I mad up the crank using 5 mm rod as its going to run on berings any way her is sum pics

krv3000 · « **Reply #5 on:** May 02, 2015, 07:32:10 PM »

right a bit more mad up the connecting rod sos not many picks as I got cared a way but a new way of picking up your pop punch marks is use a needle a long one in your tale stock chuck I tried to tack a pic of this but it is a bit fuzzy but the way it works is when the needle is in the ded centre of the pop punch and you spin the lathe chuck the needle will stay still if its not in the centre it will wobble any way drilled 1.6 mm and then tapped m2 then split the block in two then stuck the two haves on to a peace of aluminium and direst the two cut parts daw to size then screwed the two back to gether and marked out the centre for the big end this was drilled 4.8mm then reemd m5 then marked out the centre for a length of m6 brass rod to be screwed on to the big end then mad a start on the cros hed made up two pieces of 10mm by 10mm by 30mm long then on one marked out the slot cut most of it out then finish it of with a file the slot is 4mm wide right picks

krv3000 · « **Reply #6 on:** May 17, 2015, 02:58:39 PM »

hi all did a bit more sos not many picks made the crosshead and the valve and valve nut picks

vtsteam · « **Reply #7 on:** May 17, 2015, 08:11:22 PM »

Okay, now I'm beginning to understand this motor! Good work Bob!

krv3000 · « **Reply #8 on:** July 12, 2015, 05:42:38 PM »

hi its dun

mad up the in let pipe and the exhorts pipe then mad the concentric made the coupling for the valve and the concentric then mad up the fly wheel and she runs sweet will see if john wans to do a vid of it running for his Sunday night cap right pics

Stilldrillin · « **Reply #9 on:** July 12, 2015, 05:57:40 PM »

Very nicely done Bob!

Looking forward to the video.......

David D

doubleboost · « **Reply #10 on:** July 12, 2015, 06:02:11 PM »

Hi
Bob
No problem with the video
It will be a pleasure
John

micktoon · « **Reply #11 on:** July 12, 2015, 06:58:47 PM »

Hi Bob , quality finish as per, looks very neat and tidy, I looks forward to seeing the video , are you going to do an interview ?

Cheers Mick

Manxmodder · « **Reply #12 on:** July 12, 2015, 07:20:19 PM »

Nice one Bob

look forward to seeing the video of it running......OZ.

tom osselton · « **Reply #13 on:** July 13, 2015, 12:47:25 AM »

Looking forward to the video! I'd be happy with 1/4 of your talent!

krv3000 · « **Reply #14 on:** July 13, 2015, 06:34:40 PM »

thanks all for the coments

vtsteam · « **Reply #15 on:** July 15, 2015, 12:36:31 PM »

Nice, Bob!

Looking forward to seeing it running!

krv3000 · « **Reply #16 on:** August 01, 2015, 04:06:14 PM »

hi all sos for the delay but john has dune the vid of the air engine running its on his YouTube page

modeldozer · « **Reply #17 on:** August 01, 2015, 04:39:18 PM »

Watched the video, Very nice engine.

Abraham

SwarfnStuff · « **Reply #18 on:** August 02, 2015, 03:23:03 AM »

You did better than me Abraham, John Doubleboost has soooo many videos and I cannot seem to get youtube to sort by date. Link anybody?

modeldozer · « **Reply #19 on:** August 02, 2015, 06:45:53 AM »

It is part of his Sunday night nightcap 83 part2.

Abraham

SwarfnStuff · « **Reply #20 on:** August 03, 2015, 03:33:33 AM »

Thank you for the link. Strangely, I now recall seeing it several days back but naturally forgot I had when I went looking. John's videos are very good but rather long so I often skim through and stop when something looks interesting.
John B

vtsteam · « **Reply #21 on:** August 03, 2015, 09:24:22 AM »

Nice running little engine and very neat. You can't even see the flywheel turn, it's running so true and polished. Great work, Bob!

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Author Topic: air engine (Read 19388 times)