I don't remember the company, but there is a Russian helicopter powered by a three-rotor Lada with aluminum end-housings, which wouldn't handle the loads as well as steel housings (they didn't last long at high power settings). Lada stopped making the engines.

Another Russian rotary: http://avia.russian.ee/helicopters_eng/ka-56.php

Russian rotaries in general, car, boat & aircraft: http://cp_www.tripod.com/rotary/pg07.htm

Donald Garrett

TJ,
 Your wait was over a long time ago.
 Many years ago there was a Rotary powered Gyrocopter flying.
 I believe the owners name was Jim Mayfield or something like that.
 His engine was supplied by Dave Atkins.
 I also heard that it accumulated 1000's of hours as it was used for training.
Anyone have more info on this?
 Jim
  

Thomas Jakits <rotary.thjakits@gmail.com> wrote:
   Don!!
 
 Amen!!!!
 
 TJ :)
 
 Waiting for the 1st Rotary-Rotorhead flying....
 

 On 10/12/07, Donald Willard Garrett <nospam@avamail.net> wrote:  Whoa now, looks to me like the subject of this email contains a serious
nomenclature discrepancy;

As a former chopper pilot, I was officially designated "Rotorhead"
awhile before Burt invented plastic airplanes.

Y'all are "Wingnuts."

Donald Garrett

On 07.10.12 18:27:05, Chad Jensen ( cjensen@imageair.com) wrote:
> I just talked to François at Mistral on Tuesday this week, and he
told me
> they had only applied for certification with the FAA for the G-300, and
> that the write up was incorrect. Once they get it, the other models will
> follow.
>
> Just FYI from what I know...
>
> Chad Jensen
> RV-7