Emergency helicopter - start up and take off

[MereLava]

I love the sound...e non solo...

[edboston2007]

medfly



[crackerms0100]

pull the collective already 2:86

[timmytyphoon]

EC 135 is a wonderful bird and makes a perfect medivac.Our local service is replacing thier fleet of Augusta A109's with EC135's.The Augustas are alot faster but the EC's have alot more space inside for patient,crew and equipment.And the clamshell doors in the back make loading alot easier too.

[HighFlyer2017]

What model is that??

[danetrain0101]

EC-120 Eurocopter.

[Ranger4488]

Sorry Brother... That is a Eurocopter EC 135 (not 120) No offense but my local hospital operates 3 of them - 20 year flight nurse myself - In any event, simply a spectacular aircraft...God Bless!!!

[danetrain0101]

@Ranger4488 They look almost identical so it is hard to tell. This video isn't exactly HD either, lol.

[Lurch900]

@danetrain0101 actually it is a 135, the 120 looks different

[henkdecitroen13]

wrong answer, dumbass, its a EC-135, my dad flys one of those

[danetrain0101]

@henkdecitroen13 You're about 2 weeks to late for the insult, dumbass.

[sotejn]

hospital is ostrava poruba ?

[maxvel6556]

Yes, is it.

[Marshall7302]

wow did that ever start up fast.

[emokhtar]

It took much more than i expected , but that was a test for the Helicopter itself not for an emergency case.

What was that a hospital or a petroleum company ? and where was that too ?

[Jediknight1993]

2 months ago 1 of these planes crashed in hungary. the pilot and the copilot were killed.

R.I.P

[chris94kennedy]

That's a helicopter in case you didn't notice. Not a plane.

[Jediknight1993]

Than,2 months ago 1 of these helicopters crashed in hungary. the pilot and the copilot were killed.

[706d]

sweet video!

[rockvanisher]

your speakers are broken

[wheelingdude12]

no I heard her, sure she was loud at the beginning, but got quiet at the end, she didn't make the loud whap-whap-whap noise they usually make at take off, or start up

[Prometheus203]

Your right the EC-135 is extremely quiet in comparison to other mainstream helicopters... We use to have a BK117 that shook our house every time it went over and now they have one of these and I can't even tell when they've gone by... It's about 2 times quieter than the Bell 407 our Sheriffs Office uses too.

[greg8698]

Actually that whap-whap sound you hear is called reverberation and is produced by most of the helicopters with wider main rotor blades. The wider the blades the more reverberation you get. Listen to some of the Hueys and how much reverb is produced and then if you have a chance listen to a Bell 412. You get even more reverb because now you have the wider blades and twice as many of them. Once you get into the air you can't hear that reverb in the cabin. It can still be heard on the ground.

[Sid447]

greg8698, you aren't on the right track. The "whap-whap" sound is usually associated with the Bell two-blade system, regardless of blade cord. Three blades and more lose this signature altogether. The fenestron (ducted fan) cuts down a lot of the loud low-frequency noise that eminates from a conventional type tail-rotor. But it can be more damaging to hearing!

[greg8698]

sid, in response to last response regarding the "whap-whap" sound, I will put it in technical terms for you. You are correct regarding the sound being more prevelant to two bladed main rotor systems. But, the thickness and width of the blade also plays a role in the sound. In technical terms, the sound is known as "blade vortex interaction", or sometimes called "blade slap." It occurs when the helicopter is in forward motion.

[greg8698]

BVI is caused by a rotor blade passing along the back side of the aircraft encountering the turbulent wake created a fraction of a second earlier by another blade passing along the forward side of the aircraft. The sound radiates down and to the front of the aircraft.  To be even more technical, the outer edge of the rotor blade is traveling faster than the inner edge. In fact on helicopters such as the Bell 205 (Huey), 206B(JetRanger) or the model 222, the rotor is turning at about 500+/- rpm

[greg8698]

At that fast, converting it into mph, the outer edge is traveling at close to the speed of sound, 768 mph, or 1,125 ft/s. At 500 rpm the outer edge of the main rotor blade is traveling at about 625 mph which means that it is going to make a popping sound (such as an aircraft breaking the sound barrier which results in a sonic boom) when the next blade passes through the other blades turbulence. The sound is obviously at some frequency & the thickness & width of the blade affects that frequency.

[greg8698]

Another factor that affects the frequency is the angle of the rotor blade. I hope this clears up exactly what " track I am on" when I tried to keep the issue on simple terms rather than explaining it in such technical terms. Incidentally, the Eurocopter EC-135 in this video, does not produce the low frequency "blade slap" because of its 4 rotor blade system which uses much narrow rotor blades. It tends to produce a fast thud-thud-thud BVI sound.

[Sid447]

B204,205,212,412...324rpm +/- 2 @ 100% Nr.

[Sid447]

You can be as technical as you like,

I'm a maintenance and engineering guy for B206,212,412 and AW139.

We have around 55 of these things here.

[greg8698]

sid, it's nice to know that some of the maintenance and engineering guys are actually looking at some of the comments being made as it would seem to me, you guys would keep some people honest in some of the comments they make. Thanks for being here.

G.

[greg8698]

Incidently, as you know, the new Presidential Helicopter, VH-71 was scrapped by Defense Secretary, Robert Gates last week. The new Marine One was based on the AW EH101 but, I think the AW139 would make a better choice for the Pres. and could be configured with the latest defensive counter measures. It would certainly say "Classy" when seen in comparison to the old VH-3 "Sea Kings" currently acting as Marine One. What do you think?

[sdrfgvrfgvsfravgdsvS]

EC-135 is very fast startup!

[chris94kennedy]

Adapted for emergency - allows quicker arrival to an accident scene.

[cannonmaker]

Sure doesn't take long for that rotor to get going.

[ggdavis]

very good