Jet Ranger - preflight, start up & shut down video

[Steekvlieg]

I'm looking for a training video clip on the Bell Jet Ranger pre flight, start up and shut down procedure.
Google and Youtube didn't achieve the desired results. There is a nice video on Youtube but its not in English.
Thanks

[JTobias]

Hi

Keep an eye out on my youtube channel

http://www.youtube.com/jetboxtv. (http://www.youtube.com/jetboxtv)

At the moment there isn't a video of a startup sequence, but I do have some, so I will try and post one in the next day or so. PM me if I forget but I will put it on my task list as a priority.

Joel :ok:

[Rotor George]

If you understand French, this is a good one.

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[Earl of Rochester]

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[500 Fan]

Something that came up in the Turbine TOT thread was the mention of the temperature fluctuating up and down during the start sequence, prior to releasing the start-button. Looking at the temperature gauge in video number 4, would that be classed as a damaging start, given that it was a fairly "cool" start with a couple of temperature fluctuations? Thanks.

500 Fan.

[somepitch]

that seemed a pretty normal start to me, certainly not damaging... the 'fluctuations' you see are actually two temperature peaks that engineers look for in the start sequence (don't know what they're caused by...anyone?) when they adjust the fcu to optimize the start

[Earl of Rochester]

Somepitch:
.. are actually two temperature peaks that engineers look for in the start sequence, don't know what they're caused by ...


~ SP

There are some answers on the http://www.pprune.org/rotorheads/432321-turbine-tot.html thread as follows:


Matari:
The fuel control (very noticeable on a C20) goes through a couple of fuel schedules or ramps. The initial lightoff will see the the TOT gauge scream to yellow line, then come back down. That's when many new pilots relax, but forget that the second schedule starts soon after, sending another schedule of fuel into the combustor. That second spike can be just as tricky, especially if N1 speed hasn't built sufficiently. Keep your eyes open.



Perhaps someone in the know could unpack Matari's "two schedules" and explain the process of how the two temperature spikes are achieved on the Allison 250 series.

Earl

[Gordy]

Perhaps someone in the know could unpack Matari's "two schedules" and explain the process of how the two temperature spikes are achieved on the Allison 250 series.

Ask and ye shall receive:

Here ya go (http://fireheli.com/Files/allisonstart.pdf)

[Matari]

Then there's the famous Bendix "hung start" -- light off and acceleration to starter release speed but no acceleration after that. Usually cured when the mechanic sticks the eraser end of a pencil into the FC air port, collapsing the internal bellows momentarily and allowing the fuel schedule to resume.