Doman LZ-5 gimballed-rotor system transport helicopter prototypes......

[Caravellarella]

Dear Boys and Girls, here is an article in French about the Doman LZ-5 transport helicopter prototypes which featured a gimballed and hingeless rotor system……

The article comes from the 18th July 1959 issue of Les Ailes......

Terry (Caravellarella)

 

[toura]

Hi Terry

 

[Nik]

Could this be considered a first step towards 'rigid rotor' designs ??

 

[Caravellarella]

Could this be considered a first step towards 'rigid rotor' designs ??

Sorry Nik, I don't know; and I'm not really interested in helicopters anyway

Terry (Caravellarella)

 

[fightingirish]

Here an Advertisement (1957?) from Du Pont showing the helicopter Doman YH-31.
Source: https://sobchak.wordpress.com/2016/06/15/ad-dupont-doman-yh-31-1957/

 

[Stargazer]

Here an Advertisement (1957?) showing the DuPont – Doman YH-31
Source: https://sobchak.wordpress.com/2016/06/15/ad-dupont-doman-yh-31-1957/

Whoops! It's a Doman, period!

I believe that the fact that you wrote "DuPont" as one single word suggests you may have wrongly assumed some connection with the DP-2 aircraft.

Du Pont (two words) is one of the world's leading chemical companies and was merely one of the suppliers that Doman contracted with.

Thanks for the ad, anyway.