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Old 05-01-2012, 08:52 AM   #1
copeab's Avatar
Join Date: Mar 2005
Location: near Houston
Default [WWII] Kellert UC-48 utility autogyro (USA, fictional)

Kellert UC-48 utility autogyro
Copyright 2012 by Brandon Cope

The US Army Air Force was impressed with the performance of the Fokker A.III but were not interested in using an autogyro in a purely offensive role. The Army asked the Kellert Autogyro Corporation to build a utiliy autogyro with similar size and performance to the Fokker A.III.

The resulting autogyro could be configured to carry seven normal passengers (the standard transport configuration), nine cramped passengers (as listed, for short distance raids by slightly undersize airborne squads equipped with minimal gear) or cargo (36 VSP/1.1 tons). The UC-48 could also be used as an air ambulance, carrying four stretcher patients and no medics or three stretchers and two medics (in either case, the MGs are removed; the gunner is sometimes retained to act as a n orderly). Very early models were specific to each role, but eventually the UC-48E appeared which could be reconfigured in about half an hour for any of these uses.

Crew consists of two: pilot and observer/gunner. The UC-48 uses 25.7 gallons of aviation fuel per hour.

Subassemblies: Huge Helicopter Chassis +3, Rotors -1, three fixed Wheels +1
P&P: 571 kW HP gasoline engine w/571-kW prop, 75 gallon standard tanks [Body]
Occ: 2 CS, 9 PS Cargo: 0.

Body: 2/2C
Rotors: 3/10
Wheels: 3/5

2*Aircraft LMG/Browning M-2 [Body:B] (500 each)

Body: Long range radio receiver and transmitter, navigational instruments.

Size: 60'x50'x12'
Payload: 1.37 tons
Lwt: 3.32 tons
Volume: 400
Maint.: 65 hours
Price: $9,400

HT: 12
HP: 360 [body], 100 [each rotor], 10 [each wheel]

aSpeed: 143
aAccel: 5
aDecel: 8
aMR: 2
aSR: 1
Stall: 27 mph
Take-off roll (loaded): 28 yards. Landing roll (loaded): 9 yards
Take-off roll (no caro/passengers, max fuel): 16 yards. Landing roll (unloaded, 10% fuel): 5 yards

Design Notes
To better match historical autogyros, rotor area was raised to the 1.75 power in stall calculations and 1.5 power in speed calculations. Takeoff was divided by 3 and landing distances by 10.

It was realized that the low speed of the UC-48 would be an advantage in a ground attack role (designated the A-21). Small (Recon Plane) wings were added, with four .30-cal Browning M-2's (750 rpg) and hardpoints for two 250 lb and four 100 -lb bombs (these were later replaced by 4.5"and 5" rockets). Two staggered beam gunners (port and starboard) were added, arch with an LMG and 500 rounds of ammo. A pair of wings cost $1,800 and weighed 440 lbs unloaded (ammo and ordnance are 1,150 lbs). This proved to be effective when not opposed by enemy fighters. While initial production models had the wings fixed, a kit was issued tht allowed the wings to be added or removed at a workshop in about an hour. The UC-48F was the same as the -E but with provisions to mount these wings. although this version lacked the beam guns (and their gunners). For some missions, the two 250-lb hardpoints are unloaded and four commandos are carried, to perform raids after the UC-48 softened up the target with bombs and MG fire.
A generous and sadistic GM,
Brandon Cope

GURPS 3e stuff:

Last edited by copeab; 05-01-2012 at 08:59 AM.
copeab is offline   Reply With Quote

aircraft, autogyro, gunship, transport, wwii

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