Back HERC Jov-3


Tandem rotor machine powered by a 100hp Franklin engine. It had a neat fuselage of steel tube covered with aluminium and fabric, with a tricycle undercarriage and a forward cockpit for two occupants seated in tandem. The rear pylon allowed the rear rotor to turn on a higher plane than the forward rotor so that the arcs could overlap safely.

R.Simpson "Airlife's Helicopter and Rotorcraft", 1998

JK, e-mail, 26.10.2017reply

I have been envisioning an upgraded version using two blade rotors sychromeshing (so you don't have to worry about overlap) and powered by the now well-known Solar t-62 gas turboshaft engine. A one man version would actually be able to meet the weight restrictions for recreational non-licence.

Gregory W. Piasecki, e-mail, 04.08.2020 JK

I like your thinking. Any progress with this new configuration? Do you know who owns the type certificate for the configuration?


smee, 05.07.2017reply

Technical Data:
Rotor Diameter: 5.46m
Length: 8.03m
Height: 2.82m
Empty Weight: 354Kg
Max. Takeoff Weight: 544Kg
Rotor Speed: 500 1 /min
Max. Speed: 160Km /h
Cruise Speed: 127Km /h
Range: 220Km
Service ceiling: 4,207m
Price (1946) 12,000$

Rotor 07 /2017 (German RC Helicopter Magazine)
Hubnschraubermuseum Bückeburg

Norm Smith, e-mail, 17.03.2010reply

I flew the MC-4 1958 for Gish Jovanovich at Santa Monica CA. I don't have possession of any technical info, but if you have any questions I would be happy to try to answer them.

Dean, e-mail, 08.02.2010reply

Any luck obtaining any technical info on this machine? I am also trying to gather info for the same reason, but am having little luck, any ideas? let me know, TXS Dean

mike, e-mail, 01.04.2007reply

Can anyone help me out with specs - drawings - photos - contacts for other enthusiasts, etc for the Jov 3 and /or Sedan 4 tandem rotor helicopter? Planning to build a replica, thanks for any help or suggestions at all. E-mail is
Thanks, and stay light on the skids. Mike.

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