Helio H-1201T Twin Stallion

[hesham]

Helio H-1201T Twin Stallion roposed version of Stallion with two turboprops
mounted on underslung wing nacelles,retractable
undercarriage,wingtip fuel tanks and wing cargo
pods.

 

[Jos Heyman]

Aerofiles mentions a H-634 Twin Stallion 1968 with two 317hp Allison 250B mounted on a stub wing in the nose. One was built with registration N11038. A version with two 620hp PT6-A was planned. May be that was your H-1201T.

Where did you find your reference to H-1210T?

 

[lark]

H-1201 Twin Stallion (no 'T' in the designation) was a 1966
proposal designed to carry 13 passengers and two crew
but was never built.

source 'The Aeroplane' Februar 2004-Data base page 72

 

[Stargazer]

Here is what the Helio Twin Stallion would have looked like.

Source: Air Progress, July 1966.

 

[hesham]

From Aviation magazine 1965,

a clearer artist drawing