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DC (davies charlton) Rapier marine

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Terryd09/03/2012 10:20:59
avatar
1946 forum posts
179 photos

Hi again Ramon,

Found it, 'twas in the 'Message to Webmaster' thread. Here are his instructions:-

John,

To avoid the resizing thing happening, this is what I did:

  1. Click on Image button
  2. Paste the URL into the URL box and then press tab or click into another field, so that the system goes and fetches the image and puts it into the preview box
  3. Click into the Width box and type in 350. This will automatically adjust the height accordingly
  4. If you want to add in a link to the image, click on the Link tab and paste the URL into the URL box on that tab too
  5. Click OK

Example:

Hope that helps to clarify it, teeth 2

Best Regards,

Terry

rich lowe09/03/2012 23:08:13
15 forum posts
6 photos

Thankyou Ramon,

well basically the liner is missing and looking for one to go in, or at least get dimensions to get one made, but preferably i would like to buy one. i am not to worried about the intake yet, although i might chase one up at a later date, or as you said, get a venturi insert turned and tapped.

Best Regards,

Rich

Edited By rich lowe on 09/03/2012 23:08:42

Ramon Wilson10/03/2012 14:05:58
avatar
1655 forum posts
617 photos

Thanks for the instruction Terry I think I shall be okay with it now.

Rich, Unfortunately I'm afraid I can't part with the piston / liner that I have but you may be able to pick up an old 'externally abused' example of a Rapier somewhere - good examples of the early green head versions can certainly fetch a few bob but the later ones are not quite so sought after.

The dimensions (mm) of this set up are as follows....

Overall length of liner - 32.1

Distance from bottom of liner to exhaust flange - 10.5

Thickness of exhaust flange - 3.75

Diameter of exhaust flange - 21.7

Diameter above exhaust flange - 17.99 (good slide fit into cylinder head)

Diameter below exhaust flange - 18.1 (Not critical, the annular gap acts as one big transfer passage)

Width of exhaust and transfer ports is 1.58 (1/16) (The top of the transfer port is level with the bottom of the exhaust flange. The exhaust port lower edge is set .8 above top of transfer port )

Bore is 14.67

Piston wall height - 10.8. Piston has a conical top - overall height is 13.25

Pin offset from top of wall is 6.5

Con-Rod length is 24.4

This liner is hardened but were I to make one for myself I would use ordinary EN1a which is a good combination with a cast iron piston. If you already have a piston in reasonable condition it would probably be worth re-lappping this first then make the liner a thou or so down on the piston size to allow for lapping the liner.

One other point - the four exhaust and transfer ports are cut such that the pillar left between them is very small ( I believe some engines were made with three ports) Personally I would cut these less deep to give a wider pillar say 3-4mm wide. This will have very little if no effect on performance but will make for a stronger liner.

Reclaiming small engines like this has always given me a great deal of satisfaction so good luck with yours

Regards - Ramon

rich lowe10/03/2012 15:29:47
15 forum posts
6 photos

Thankyou so much Ramon, this is a big help and is greatly appreciated. And i strongly agree, there is so much satisfaction in getting these engines running again. I cant help but mention how much i admire your skills. I saw some of the pictures of when you was building an engine from scratch, excellent job smiley

Well, as i said, thankyou so much for your help, i can see getting this engine running again isnt as far away as i originally thought.

Best Regards,

Rich

Ramon Wilson10/03/2012 15:57:40
avatar
1655 forum posts
617 photos

Glad to be of help Rich - don't forget to tell us when it's up and running.

Regards - Ramon

rich lowe10/03/2012 16:10:20
15 forum posts
6 photos

will do, smiley

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