Mi-4 "Hound" Polar version
1.0.19 Update: fixed engine issue. It seems fluid nozzles can`t be used for exhaust anymore. Also added some rescue and survival equipment, ropes and hardpoints to transport lagre cargo. Refueling ports changed to fluid ancors.
Update: Thanks to MrNJersey, found bug in "Diasabled failures" mode, fixed.
This is my new "Extreme realism" collection old Soviet Mi-4 "Hound" helicopter, and it`s more extreme and realistic than ever. Few of these was in use by USSR Antarctic expedition in 1956-1960.
Design in general was inspired by Sikorsky H-19, but Mi-4 is bigger, heavier and can carry 1.5 times more weight.
Weight – 4900 kg empty (in game way less, because it`s just impossible to make it that heavy and then fly it for any reasonable distance)
Top speed – 185 km/h
Range – about 400 km (in game 220)
Max load – 1500 kg
WHAT IS REALISTIC
– Engine fully simulated: behavior, heat management, oil system management, misfires and malfunctions, wearing, cold start, maintenance
– Transmission: same
– Electrics: malfunctions, power consumption and management
– Ice management: icing, deicing systems, malfunctions
– Body design and dimensions (except weight and range)
– Interior and cockpit design
Warning! This thing is very complicated to manage, and it will break down pretty often. It`s not "push the button and fly" thing, but at least there isn`t unmanageble catastrofic failures you can`t fight, like tail prop failure or control cables snap.
I`m giving here only startup procedure. Guide is here – https://steamcommunity.com/sharedfiles/filedetails/?id=2215993853.
STARTUP
– Check for failures and liquids levels (if neccesary)
– Get in
– Turn battery on
– Turn cockpit and instruments lights (if neccesary)
– Open fire valve
– Set throttle to 0.05
– Turn magnetos on
– Turn BNC pump for a few seconds to build up fuel pressure
– Check fuel pressure higher than 1.3 kg/cm2
– (COLD START) Turn oil dilute on. Press and hold PRIME ENG with "E"
– Press STARTER SPIN button with "Q" and keep it depressed
– Wait few seconds for flywheel to spool up
– (COLD START) Release PRIME ENG
– Press CLUTCH with "E" and wait for engine to start. Maximum starter motor working time – 20 sec per startup attempt. Wait 40 seconds for it to cool down after 20 sec usage
– As engine started, watch oil pressure and temp. As temp gets to 30, or pressure is lower than 6.5, set throttle 0.1
– (COLD START) Turn oil dilute off, watch oil pressure
– Open oil radiator flaps
– Turn generator on
– Watch for cyl head temp more than 90. Increase throttle if necessary. Won`t work properly if cold
– Turn PT-125 and position lights on
– Turn rotor brake off
– Turn gearbox oil pressure on, wait for oil pressure more than 3 kg/cm2
– Turn servo booster on
– Turn clutch on
– As rotor spools up, increase throttle to keep RPM above 1000. Throttle 0.5 is fine.
– Watch gearbox oil pressure. As it reaches more than 5 kg/cm2, turn off gearbox oil pump
– Watch cyl head temp. As it reaches 225, open cowl flaps
– Watch for hyd systems oil pressure. It should increase in both, and than it should fall to 0 for reserve system
– As hyd system warning light goes away, and rotor RPM reaches 110, you`re ready for taxi
– Set throttle to 0.5
– Disable parking brake an taxi out
Before takeoff check for parameters:
– Gearbox temp 40-70, pressure >3
– Engine oil temp 40-70, pressure >5
– Cyl head temp >120
– Voltage >25
– Rotor RPM >110
– Engine RPM >1600
– Fuel pressure >1.2
– Main hyd pressure >40
If everything is fine, you`re good to takeoff.
– Set throttle to 0.8, wait rotor RMP >135 and takeoff
– Use "1" and "2" to adjust forward trim to fly forward
– Keep rpm >130
– Keep rotor angle <18
– Watch for cyl head, engine and gearbox oil temp. Decrease throttle or increase speed if something overheats.
– Best economy mode – throttle 0.9 fwd trim 1.
Throttle chart:
Idle – 0.05-0.3
Taxi – 0.5
Hover – 0.8
Normal flight – 0.85-0.9
If in flight engine misfiring – check for fuel pressure ASAP. Use BNC pump if it`s too low.
In case of engine or gearbox failure you`ll have just few seconds to land helicopter, while it`s autorotating.
It`s calibrated to traver to Arctic, so you`ll definetly have some fun with malfunctions, repairs, refilling, restarting and so on, but only on long enough trip.
If you still want "easy mode" – there`s DISABLE FAILURES key switch under upper left hood. Turn in on and it will stop breaking down, catch fire and use oil etc.
Good luck!
