ED Racer ‘times two’

[Terry FordParticipant @terryford]

Thanks for your welcome Ramon and Neil.

 

Blimey, my memory bank has been opened! I’m thinking about me as a school boy putting a Grasshopper in the cockpit of a little balsa and paper plane as a pilot.

 

All this was a Golf course in the middle of Uk. It had plenty of places and tolerance to boys messing about with planes. I’m reminded of building a Glider, that had a Saltpetre fuse so that it launched straight then the fuse burnt through and the rudder turned to make it circle. This was powered by the rubber from a dismantled Golf ball, which was extremely long and perfect for launching.

[Steve Talbot 1Participant @stevetalbot1]

Hi Ramon,

Sorry if this has been raised before, but, what has happened to all your photographs? The Picasa site seems to have been erased and so have your photos attached to these forum postings.

Regards, Steve T

[Ramon WilsonParticipant @ramonwilson3]

Hi Steve,

 

I’ve only just seen this and can only think it is something I did on Picasa a day or so ago.

I will look into it this evening – busy machining at the mo. The images were all there last time I looked so I hope that’s still the case

 

thanks for raising the issue

 

Regards – Ramon

[Ramon WilsonParticipant @ramonwilson3]

There we go Steve – easier than I thought.

 

I had noticed that some of my albums were ‘Public’ and others ‘Limited to anyone with the Link’.

I converted them all to the latter thinking that this site had the ‘link’ – apparently that’s not the way it works then. I’ll have to change the others later.

 

Regards – Ramon

[Richard ParsonsParticipant @richardparsons61721]

Raymon On the drawings of the ED racer times two you quote the fit sizes for the bearings as 0.003 to 0.005. Are these metric? The fits you quote seem to be in inches.

Rdgs

Dick

[Ramon WilsonParticipant @ramonwilson3]

Hi Dicky,

These are metric dimensions. The fits on the crankshaft are less than those for the case.

 

You should just be able to push the front bearing on the shaft by hand, the rear bearing just a little tighter.

 

The bearings need to be tighter in the case than on the shaft and will fit easily with the tolerances shown if you heat the case with a hot air gun or in the oven. Drop the front bearing in the case then with the rear bearing already on the shaft this should just slide in the case if it hasn’t cooled too quickly. I have used this method on many occasions and it works just fine

 

These fits are not taken from from the usual laid down sources but are what the originals were made to which I find is more than sufficient for the task in hand – these engines, ie the 5cc version, when designed were not intended to be used in a high speed operational environment. The shaft tolerances are easily achieved by careful use of wet and dry paper – about 600 grit – especially if stuck with double sided sticky tape to something really flat – eg a parallel . Plenty of paraffin and oil (90 -10) mix and constant measuring is the key

I don’t think the misnomer – “A 5cc racing engine” is of my doing

 

I hope your engine is going well

 

Regards Ramon

 

 

 

[Terry FordParticipant @terryford]

Hi Ramon,

 

I have just had a happy hour looking at your photo gallery, great stuff.

 

You have given me a little confidence, that I might be able to tackle my engine.

 

I can see that you have a good set of tools, probably collected over the years. so I had better start shopping.

 

All the best, Terry.

[dean clarke 2Participant @deanclarke2]

hi ramon, i have kept watch on your projects through modelengine news and read the threads on this site. i find your technics very inspireing and encouraging. your engines are very nice. it's a pity i live in new zealand and am unable to see them in the flesh. thankyou for sharing them with us and the inspiration you have provided me with as a new engine builder.

dean

[David Clark 13Participant @davidclark13]

Hi There

The next issue of Model Engineers' Workshop, no 194, has Ramon's article about anodising his cylinder heads and other bits.

regards David

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