Mike
My firewalls are far from brick solid, simply 1/8" lite ply with 5.7 oz carbon on both sides, and mostly cut-out for weight/airflow. Pretty much everyone who has ran the Pletty has mounted it this way, I know of none that have failed in a variety of aircraft....thats thousands of flights of proof that firewalls dont need to be complicated, heavy and over engineered.
I cant speak for any other outrunner, maybe they are simply out of balance and inducing huge dynamic loads into the structure.
For anyone running a Pletti, the mount that I use works plain and simple no need to more.
ORIGINAL: MHester
ORIGINAL: Adamg-RCU
Who said mounting to the firewall was a good idea? I'm just saying that if this fuselage would be have been made 6" longer, the result would be a much lighter and simpler airplane.
That is true....very true.
Mounting to the firewall works well, but the firewall has to be a solid brick wall. It works but best solution? Well, the best solution is.....who really knows yet, since there's nothing even close to standard about any of it. Hence why there 1001 different ways to mount it, and one that has a higher than normal risk of seperating the nose from the rest of the plane. I hate it when that happens...
-M