I wonder how much more efficient the four (or more) blade rotor is compared to the two bladed. More rotor area = more lift? I think I read somewhere that the 214ST is the heaviest twin rotor hello made. Perhaps there a limit to how far you can scale a twin rotor'd hello. I obviously know very little about this subject.
I think originally the Bell 214 ST was specified amongst others by the Iranian Air Force when the Shah was ruling. The two bladed system required smaller hangars and they already had the sstem on the 214 B. For information : The Bell 214 ST, reg.: LN-OMM was sold fom CHC back to Bell Texron for further developement towards a four blade rotor system (roumors say).
Its a shame that someone hasn't replaced the twin blade rotor head with either an enlarged B412 or better yet at UH-1Y four blade rotor. Would make a killer medium twin.
Anyone know why Bell chose the twin blade configuration rather than the presumably more efficient four blade one?
This procedure is used when starting in strong winds, 40 kts +. Maximum wind for normal start operations: 55 kts. Only specially trained personell was allowed to hold blades.
@stealhty1 Procedure was used in strong winds, 40kts+ up to 55 kts. This way the blade would accelerate quicker therby gaining control of the rotor with the cyclic stick faster. The blade was also "thrown up" to avoid the tail boom. Procedure used for more than 30 years on Bell 212 and 214ST. Now discontinued as we no longer hav helicopters with 2 bladed rotor system.
Fascinating, I never realised that you had to hold onto the rotors of a helicopter as it starts. Looks pretty dangerous - important to know when to let go I suppose.
Is it just the 214ST that requires this with the two blade wide cord arrangement and only in high winds?
I wonder how much more efficient the four (or more) blade rotor is compared to the two bladed. More rotor area = more lift? I think I read somewhere that the 214ST is the heaviest twin rotor hello made. Perhaps there a limit to how far you can scale a twin rotor'd hello. I obviously know very little about this subject.
TheDigitalKiwi 1 month ago
I think originally the Bell 214 ST was specified amongst others by the Iranian Air Force when the Shah was ruling. The two bladed system required smaller hangars and they already had the sstem on the 214 B. For information : The Bell 214 ST, reg.: LN-OMM was sold fom CHC back to Bell Texron for further developement towards a four blade rotor system (roumors say).
70JaguarEtype 1 month ago
Its a shame that someone hasn't replaced the twin blade rotor head with either an enlarged B412 or better yet at UH-1Y four blade rotor. Would make a killer medium twin.
Anyone know why Bell chose the twin blade configuration rather than the presumably more efficient four blade one?
TheDigitalKiwi 1 month ago
@TheDigitalKiwi Maybe it was because Bell did have as much 4 blade experience at the time.
discofishing 1 month ago
omg i love that work
935514595 4 months ago
Post some more video of the 214 if you have it!!!! Thanks
mvar1354 10 months ago
This procedure is used when starting in strong winds, 40 kts +. Maximum wind for normal start operations: 55 kts. Only specially trained personell was allowed to hold blades.
70JaguarEtype 11 months ago
@70JaguarEtype yeah you must had worked at an local barber shop for at least 3 yrs
stealhty1 3 months ago
@stealhty1 Procedure was used in strong winds, 40kts+ up to 55 kts. This way the blade would accelerate quicker therby gaining control of the rotor with the cyclic stick faster. The blade was also "thrown up" to avoid the tail boom. Procedure used for more than 30 years on Bell 212 and 214ST. Now discontinued as we no longer hav helicopters with 2 bladed rotor system.
70JaguarEtype 3 months ago
Fascinating, I never realised that you had to hold onto the rotors of a helicopter as it starts. Looks pretty dangerous - important to know when to let go I suppose.
Is it just the 214ST that requires this with the two blade wide cord arrangement and only in high winds?
TheDigitalKiwi 11 months ago
@TheDigitalKiwi No other Bell products have the same issue with the teetering head.
kblackav8or 1 month ago