Take a look at what a club member gave me. Great compression; I'll report when I get a chance to run it.


I ran it today 50 degrees and a black MAS 9x4 at 10,300 RPM started easy.


Francis

Very cool, it's RC too, you'll be flyin that before long.

I flew a CL Super Racer without mufflers for a while. It started and ran well, but was not quite as powerful as my well run in MK II Racer on the same airplane. Might have improved with more running, however.

Incidentally, I think you box art is actually an MK IV. The MK IV had a larger front bearing than the Super Racer (which your engine is.)

I've always recognised at least 6 marks of ED Racer (counting the Super Racer as the Mk6)
Mk1-red fins, spinner, prop driver, no web between front and rear ball race housings, chromated (black) crankcase
Mk2- " " " , strengthening webs between front and rear race housings, black crankcase
Mk3 " " " , solid parallel front housing, black crankcase
Mk4 " " " " " " " , aluminium crankcase (some polished, some dull)
Mk5 plain fins, spool type prop driver, sleeve prop nut, aluminium case
Mk 6 plain fins, unfinned head, tapered front housing smaller dia front bearing, grubscrew type prop driver, black plastic backplate and disc assembly in std, R/C and 90 degree downdraft carb versions

....and that doesn't include the factory reed valve versions with green anodised parts rather than red, or some of the transitional variants around the mid 60's -Mk4/5? some of which had no exhaust stacks but a Webra silencer [no doubt as a result of the association ca 1964 with Webra that resulted in the Webra made ED Hawk 1.5cc]

ffkiwi

Francis,

Congratulations on your new engine, what a great present.
I used to run an identical engine for many years in a Keil Kraft Mini-Super with 3-channel R/C - my first multi-channel ship, in the mid-70`s
That plane had a span of 48" IRCC (plans are available from Ben Buckle in England)
I used mild standard fuel & 9/6 - 10/4 props. It throttled great and had a wonderful muted rumbling sound with the twin silencercs, but wasn´t very powerful by today´s standard.
Easy starting, very pleaseant engine - I loved it.

Finally wore it out and couldn´t get spares so I switched to a PAW 19. The plane was so oil-soaked & heavy, it needed a power boost anyway!

Run it & fly it, I think you´ll love it too!

Tomas H.

I understand there was also an ignition version and a glow plug version. I had one of the latter many years ago.