Got 'er done. Rossi ABC 60, using Mac's muffler, APC 12X7. I understand 2 gallons to break it in. Get it in the air, let you know what happens. I have a load of 11X7.75 TF Super M's, may try that also. Spring-Aire's.

Crankpin

Good looking airplane. Reminds me of my Vertigo II with a piped Rossi Blackhead back in the late 70's. That engine ran best on 3 percent nitro with a Zinger 11 X 7.5 We clocked that plane at 135mph on highway patrol radar.
Regards
JC

Nice work, Crankpin.

I'll be using an 11x7 prop with either a Jett or Ultrathrust muffler on my Rossi .61 AXE powered Phoenix 5. I like to hear them howl. I wish I could locate some Rom gear with a belly mount nose gear.


Ed

JCINTEXAS - This is my first Rossi. Used to use the Super Tigre G61ABC's. Those are kind of rare now. Using OS61FX's in other birds. Ross has an adapter to fit the OS61 muffler to it. I just took that adapter, mated it up to the Mac's muffler for the OS61FX.

I have a Vertigo II in the attic, and a few Phoenix V & VI's here. I have started on a V and another VI. I may just get that Vertigo down to build something different. The Phoenix with the Rossi has history.

Ed Cregger, I have some 11X7 and 11X8's, see what works.

Crankpin

Crankpin,
Wow...seeing your pic of your Vertigo fuselage gave me a wave of nostalgia. I flew my Vertigo for four years. The first engine was a Webra Speed .61 and with that engine the Vertigo was just "average". Steve Helms advised me to "get a Rossi".
I did...and he was right. Switching to the piped Rossi made a world of difference. Flying in cool "heavy" air, I could start knife-edge at 20 feet and it would climb-out and do a 400 ft. half-loop or 'Immelman' in knife-edge and probably would have done a full knife-edge loop....but I never had the courage to do the last half of the loop. The axial maneuvers were great at high-speed. So far as which muffler....I would go with a tuned-pipe.
Regards
JC