flyrotary@lancaironline.net Mailing List Archive

Try 892. Granted 440 lbs digital bathroom scales, but probably close enough for the truth.

Add 180 for pilot and 30 for fuel, 1,102 and over aerobatic gross weight just like that.

I know I should easily be able to keep loops below 3.5 Gs, but don't trust myself to do so. Haven't been doing loops since 2005 in my old RV-3.

Hushpower muffler hung below and after the firewall which I lost shortly after I got the plane, which I replaced and secured better.
Still loud in the cockpit (those are turbo housings w/o splitters), so I hung a 3' 2 1/4" SS pipe after it to get exhaust behind seat. I guess the innards were soon blown out of the muffler. So too loud and I fishtailed the end shut and drilled 5 rows of 1/8" holes on bottom of last half of the pipe. Amount of holes calculated to equal area of 2 1/4" pipe. That made the noise tolerable for me.

Finn

On 1/27/2017 3:28 PM, Doug Lomheim wrote:

"...I regularly do see 2,500 fpm or more after take off, even though it's built too heavy (electric water pump, SS hoses, brackets, etc. that could be lighted). Still haven't gotten up the courage to do a loop because it's over gross aerobatic weight even with 5 gals of fuel.

Finn”

Finn:

Thanks for the reply! So your empty weight must be 850 pounds or so?

What did you do for a muffler…hang an external one on the bottom or tuck one in the cowling somehow?

Take care,

Doug

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