Vintage RC Helicopters - Kalt Huey Cobra

KALT Huey Cobra

Kalt Huey Cobra 450 (1971)

The Cobra 450 was Kalt's first helicopter and an 'official' scaled down copy of Schlüter's Cobra, for the Enya 45BB which was included in the kit. The rotor head was a direct copy of the free teetering Schlüter head however, later versions of the Cobra 450 employed the non-teetering type similar to the MM Lark.

Kalt (with plain canopy) next to an 'original' Cobra - Uwe Jantzen

modified for 'Drag' racing.

Kalt Huey Cobra 500

1981 catalogue photos with flybarless head option.

By the end of the 70's, fixed pitch control had generally been assigned to 'trainers' and so the Cobra was upgrade to take a collective pitch head and autorotation clutch. In line with Kalt's policy the kit was provided without a rotor head and the customer chose the specification of the head themselves. For this later model the OS 50H became the minimum size recommended engine and thus this version was given the '500' tally to differentiate from the original fixed pitch version.

	Length (less rotor) - 56 inch
	Main Rotor diameter - 58 inch
	Rotor Head - Any Kalt CP version
	Weight - 9 to 10 Lbs
	Engine - .50/.60 cu in (8.0/10 cc)
	Reductions - 10.5 : 1 : 4.2
	Radio - Four/five channel with five servo's

1985 Circus Hobbies catalogue.

By 1982 the flatbed mechanics had been upgraded with autorotation and though the catalogue photo's above show a flybarless head, the basic kit was marketed to include the K-1SB rotor head assembly as noted in the photo's below; the '500' designation was also 'dropped'.

Uprated Autorotation mechanics with K-1SB head assembly.

Kalt Cobra 500 with later version collective head.

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