Hey Gert,

You might want to consider the engine weight. I seem to recall that people building Blue Angels have trouble with the CG ending up too far forward. There might even be something about the CG in Mike's Blue Angel thread, if I find any reference I'll post again.

The engine Yoshioka used in his Blue Angel, and the engine the MK kit was designed for, was the Enya 60 B-III. The 60 B-III wasn't a Schnuerle-ported engine, it was cross-flow scavenged. I think the 61X was a later, Schnuerle ported engine. [link=http://www.enya-engine.com/ListCL_E.html]Enya still supply a control-line version of the 60 B-III.[/link]

The Enya 60 B-III only weighs 380 grammes. A later, Schnuerle ported engine, as we will tend to use in a ship like this today, will weigh a bit more. For example Webra 61F, as used by Prettner in the Super Sicroly II and Curare, and by Matt in the Atlas, and [link=http://www.webra-austria.at/motor.php?search=1024&folder=AERO&lang=DE]still made by Webra[/link] weighs 445 grams.

I too have a pair of Webra 61 LS long stroke, mine are rear exhaust. I haven't weighed them but I'm sure they weigh a bit more than my 61F.

And about the HP 61 Gold cup, going from the [link=http://www.mecoa.com/hp/61/2203.htm]specs given by MECOA for the HP 61 Gold Cup they make today[/link] the weight is 17.1 ounces, or 485 grammes, that's over 100 grams more than the Enya 60 B-III.

Best regards,

George