anyone interested in a radial team buid

[chrispare]

I everyone would like to pm me thier mailing address I will put a list togeather and give it to everyone.

thanks
Chris

 

[warranator]

Can someone tell me which way the motor runs cw or anti cw. Was thinking of cutting a thread on the crank pin and tapping the crank and screwing them together instead of pressing. Making the 2 parts on a cnc would guarantee they would screw together parallel. Any thoughts?

 

[maverick]

The pin will have to have a shoulder to register with a counterbore in the crank.
It shouldn't matter which direction it rotates if the thread is tightened with a bit of loctite.

 

[warranator]

Yeah my thoughts were the same. Will write the program tonight and should start in the morning. Will post a video when it is up and running.

 

[SBWHART]

Direction of rotation is governed by which side of the centre line the pin is in the crank, as drawn it will go clockwise.

As aside if you swap the air feed over to the exhoust it will also run in reverse, but slightly slower.

Stew

 

[warranator]

Can someone give me the exact size of the bearing id for the crank shaft. Thought I saw it some where in this thread but cannot find it. I can turn the shaft to a precise size so I would like to do it right so we have no slop and not to tight.

Also the crank pin I am turning to 6.35mm as I read in an earlier post the holes for the conrods were getting reamed a bee's dick bigger than 6.35mm. Ok with this.

Part is just about fully programmed and proto made from brass.

 

[Path]

Can someone give me the exact size of the bearing id for the crank shaft. Thought I saw it some where in this thread but cannot find it. I can turn the shaft to a precise size so I would like to do it right so we have no slop and not to tight.

Try thread number 137 and drawing 3013.

Also check thread 134 and 136 item #9.
I suspect that the ID is .375 but hope that Chris could tell us the brand of bearings then we could check the tolerances.

I would like to see 9.535 that we we can remove material if necessary.
Or any possibility of getting a bearing??


Pat

 

[chrispare]

the bearing inside is .375 in
It is made by KML 1604-zz

 

[warranator]

As promised here is a video of the crank shaft being machined out of brass so you can see what is happening, of course the real ones will be made out of steel but I will be using coolant which will obstruct view. Also some pics.

http://photobucket.com/teambuildradial

Use this link for video

http://s1109.photobucket.com/albums...on=view&current=video-2011-10-12-10-33-01.mp4

 

[Path]

Wow .... now that's nice!


Thanks for sharing,

Pat

 

[pcw]

that is a great video. i am just little bit jaleous now.
Pascal

 

[maverick]

URL=http://imageshack.us/photo/my-images/256/1000113v.jpg/]

[/URL]

That is a bunch of con-rods. A few more bushings then on to the flywheels.

Mike

 

[Path]

Looking good .... :bow:

I guess I should get some photos of my cylinders just to keep up
with the rest of the team! I have 16 that are ready for the holes/tubes and
outside contour... then the liners and pistons.

Will try to get pictures today/tomorrow.

I will be using 3mm -.5 pitch for the top threads ... okay


Pat

 

[warranator]

And then it was steel. Made 15 all up. Still need to do the crank pin and the crank returns.

Maverick: I think I read some where you were reaming the big end of the conrod to 6mm? If so I will turn the crank pins to 5.99mm.

 

[maverick]

Warranator,
The big end was reamed .251 and is slightly undersize. A .250 pin is a nice sliding fit
and a .251 won't fit. I recommend making the throw .2500. The small end was reamed
.158 and seems undersize as well. I guess the bronze is not very free cutting. The cranks
look great and the vid was fun to watch.

Regards,
Mike

 

[dalem9]

a picture

 

[dalem9]

another picture

 

[dalem9]

Hi Parts 3,4,5 are all done and ready to be mailed. When I get the addresses I will mail them . Dale

 

[dalem9]

Parts for engine # 3,4,5

 

[chrispare]

Looking good fellas.

Please remember to PM ME YOUR ADDRESS ( for mailing the parts)
thank you to those that have already.