Vintage RC Helicopters - Kalt JetRanger

KALT JetRanger

Kalt JetRanger (1972)

Follow on model from the original Kalt Cobra 450 utilizing Kalt's flatbed mechanics for the Enya 45BB plus fixed pitch rotor head.

Nov 72 first Japanese helicopter competition

Kalt JetRanger 600

Fixed pitch helicopter with Kalt's flatbed mechanic.

Kalt JetRanger 500 (1979 or earlier)

1981 Catalogue photos including Flybarless head option.

By the end of the 70's, fixed pitch control had generally been assigned to 'trainers' and so the JetRanger 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.

Details:

	Length (less rotor) - 1360 mm / 56 inch
	Main Rotor diameter - 1480 mm / 58 inch
	Rotor Head - Any Kalt CP version
	Weight - 4.5-5.0 Kg / 10-11 Lbs
	Engine - .50-.60 cu in (8.0-10 cc)
	Reductions - 10.5 : 1 : 4.2
	Autorotation - Standard
	Radio - Four/five channel with five servo's

Revised 500 Mechanics with modified gearbox

By 1981 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.