The land ing gear is the skid type and is nonretractable. Fore and aft
cross beams at tach to the un der side of the cen ter frame sec tion and pro -
vide for at tach ment of struts and oleo-type, shock-ab sorb ing damp ers.
Right and left sta bi lizer as sem blies con nect the out board ends of the
cross beams and pro vide step ping ar eas for en try to each side of the
cabin and for ser vic ing and in spect ing the he li cop ter. Skid tubes at -
tached to con toured fit tings at the lower ends of the struts pro vide at -
tach ment points for in stal la tion of ground han dling wheels.
The powerplant is the Textron Lycoming Model HIO-360-D1A
four-cyl in der, hor i zon tally op posed, air-cooled en gine, with fuel in jec -
tion. The en gine is rated at 190 hp at 3200 rpm for both take off and
max i mum con tin u ous op er a tion at al ti tudes from sea level to 4200 feet
(1280 m) with stan dard at mo sphere con di tions. The en gine is mounted
hor i zon tally on shock mounts within the cen ter frame sec tion.
The en gine trans mits power through a belt drive trans mis sion as sem bly
to the main trans mis sion and tail ro tor drive shaft. The lower pul ley of
the belt drive re ceives power from the en gine crank shaft and di rects
the power to the up per pul ley through a matched set of V-belts. An
idler pul ley run ning against the set of belts and con nected to a pi -
lot-con trolled ac tu at ing mech a nism op er ates as a clutch to en gage and
dis en gage the up per pul ley with the lower pul ley. The up per pul ley at -
ta ches to the in put shaft of the main trans mis sion and in cor po rates an
over run ning clutch that per mits the main ro tor to drive dur ing the
auto ro ta tion with out en gine power.
The main trans mis sion mounts on the lower end of the nonrotating
main ro tor mast and is rig idly fixed in po si tion by sup port mem bers
con nected to the cen ter frame sec tion. The trans mis sion is lu bri cated
by a self-con tained lu bri ca tion sys tem and is cooled by air flow around
the hous ing.
The main ro tor drive shaft trans mits power from the main trans mis sion
to the main ro tor hub. A thrust bear ing, act ing upon a shoul der on the
drive shaft, po si tions the shaft within the mast.
The three-bladed main ro tor sys tem is fully ar tic u lated with flap ping
hinges and lead-lag hinged blade at tach ment.
General
Pilot's Flight Manual
SCHWEIZER
Model 269C Helicopter
1-8
Reissued: 16 Jan 2019
This Document contains technical data subject to EAR. See WARNING and classifications on first page.
CSP Book 1 CSP-C-1.indd 34 8/4/19 12:45 PM
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