air engine

[krv3000]

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]

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

Good luck.....   

David D

[stevehuckss396]

Should be interesting to see. Might get on EBay and see if I can find a small cylinder for myself. Great idea.

[krv3000]

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]

Hi all well the engine is finished but I'm on me tablet so can no post any pics but there is a video of it. running on YouTube don't no haw to put the link on but its on dubbelboost YouTube canel

[Admiral_dk]

Hi

No luck finding it on youtube - don't you mean doubleboost ?

What did you call the engine there ?

[b.lindsey]

I found a lot of posts for doubleboost as well, but didn't see this specific engine. If you can point me closer to the location of the video, I can post it here for you krv.

Bill

[krv3000]

 hi this is the one that me engine is  on yep as crap at spelling it is doubleboost Sunday Night Night Cap 83 part 2

[krv3000]

hi her is a pic of it dun

[b.lindsey]

Here is the youtube video...posted on behalf of krv3000

[youtube1]https://www.youtube.com/watch?v=d-KDJNPRGZk[/youtube1]

Bill

[Don1966]

Congrats Krv for a beautifully done engine and a great runner..........

[cfellows]

Nice running engine!  Nicely done video, as well.  Thanks for sharing.

Chuck

[fumopuc]

Congratulation Krv, a very smooth runner.

[PStechPaul]

Nice work! The castings and patterns were interesting also.

[Stilldrillin]

That's a nice runner, Bob! 

Sounds crisp. Looks it, too! 

David D