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Robinson R44

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Robinson R44

Old 4th May 2005, 14:29
  #541 (permalink)  
Join Date: Jul 2002
Location: UK
Posts: 2,729

Gaseous and I were briefly discussing a similar point 'off-forum' a few weeks ago and I know that this refers to the injected version of the 540 but, for the record, the current version of the RII POH states:

On page 7-9, under Systems Description, Engine Controls (page date 3 Oct 2002) it states:

In-flight leaning with engine mixture control is not allowed. Mixture must be full rich during flight.

So, I guess that Frank must've changed his mind enough for it to go from 'not recommended' to 'not allowed'.



PS This is in the 'Systems' section rather than the 'Limitations' section of the POH so I guess you could argue that it's still advice rather than an order but I know what I would (or, more importantly, wouldn't) do in flight...
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Old 5th May 2005, 08:26
  #542 (permalink)  
Join Date: Nov 2001
Location: Lancashire UK
Posts: 568
Both the R44 and 22 are on the approved model list for the JPI EDM700, and the FAA flight manual update exists, and it is STC'd, so it is theoretically possible to fit this instrument to Robinsons. You may have a job convincing your local CAA man it is a justifiable mod but it is possible. It would probably be easier in the States. It would be even more difficult to convince him that a vernier was justified.

As B73 says, Robbies as supplied should not be leaned on a whim.

I'd love to have a go in a modified, properly certificated one though. Are you up for it H-R?
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Old 5th May 2005, 13:41
  #543 (permalink)  

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Rule one in software use "never be the first to try it"

But I guess there has been unofficial use for some years as noted in That Book.
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Old 18th May 2005, 03:07
  #544 (permalink)  
Join Date: May 2001
Location: queensland australia
Age: 73
Posts: 563
r44 loses fan

the fan of this r44 came adrift in flight, and over water too.

they had popouts but made it to shore.

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Old 18th May 2005, 05:45
  #545 (permalink)  
Join Date: Mar 2005
Location: australia
Posts: 94
Congrats to the pilot!!

I bet his or her arse was puckered up for that!

It's happend on the R22 but i havent heard it on the R44...whats next the main blades??
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Old 18th May 2005, 07:40
  #546 (permalink)  
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Phew - wotta mess !

Hey, at least on an R22 it could just fly out the back - The R44 is more enclosed and it looks as though that's helped this one to do a whole load of damage !

There's a big nut with a retaining pin though it that holds the fan to the shaft. The pin is supposed to line up with witness marks on the fan itself. I always check this on my walkround. One time I noticed that the pin wasn't lined up with the marks - and decided not to fly until it had been checked. Glad I did now !!!

Be interesting to find out in due course what the cause of this one was - it looks well shredded.
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Old 18th May 2005, 08:52
  #547 (permalink)  

Senis Semper Fidelis
Join Date: Feb 2001
Location: Lancashire U K
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That pilot did very well, and helped himself to a whole load of future life!.

Like most others I was also told to check the pin the paint marks and look for cracks.

It gives me the shivers when you think about the amount of damage that a out of balance fan could cause to the Monocoque tail of the R44.

Well done R44 Pilot!!

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Old 18th May 2005, 16:33
  #548 (permalink)  
Join Date: Jun 2004
Location: bill's fridge
Posts: 62
Is that where the drive shaft ended up? It's not usually down there even when sheave at lowest point is it?

The flex plate doesn't look damaged, but did they lose tr drive shaft also?

And that bit of the frame at the bottom, snapped in flight? did the tr ds go through it?
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Old 19th May 2005, 05:35
  #549 (permalink)  
Join Date: Sep 2004
Location: Canada
Posts: 64
The nut slipping on the fan is usually caused by the engine being started with the throttle wide open. If this occurs be sure to check that witness stripe and dont fly it if they dont line up. Just my 2 cents.
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Old 1st Jun 2005, 21:05
  #550 (permalink)  
Join Date: Dec 2000
Location: Ask the voices!
Posts: 435
R44 Question??

Can anyone advise the overspeed inspection criteria for an R44?

Thanx in advance
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Old 2nd Jun 2005, 10:39
  #551 (permalink)  
Join Date: May 2005
Location: Orstrailya
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I recall hearing the cooling fan nut coming loose on some 22's & 44's after overspeeding.Perhaps it might be wise to make sure torque stripes line up with the pin.
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Old 2nd Jun 2005, 22:02
  #552 (permalink)  
Join Date: Dec 2000
Location: Ask the voices!
Posts: 435
Thanks for the answers.

Does anyone know what the criteria is above 112/117% (i.e: Off the calibrated bit of the tacho?)

Thanks again
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Old 2nd Jun 2005, 23:19
  #553 (permalink)  
Join Date: Jul 2002
Location: Murica.
Age: 41
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Just had a look in the MX manual, only thing I can find is 90%-108% power off and 99%-102% power on, so nothing new...and question not answered.
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Old 3rd Jun 2005, 08:21
  #554 (permalink)  

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How do you know you have had an overspeed ????
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Old 3rd Jun 2005, 08:24
  #555 (permalink)  
Posts: n/a
Once off the scale, you need all Mr. Selfish items plus a complete engine strip. Costs about 15-20,000 in total retail depending on what needs to be replaced. From the outside an overspeed sounds dramatically different to the normal engine noise, high pitched, almost screaming. Hull insurance should cover it (minus the excess) but expect your premiums to go up by a couple of thou next year.
Old 3rd Jun 2005, 09:21
  #556 (permalink)  
Join Date: Dec 2000
Location: Ask the voices!
Posts: 435
I'm sorry I have been a little inspecific.

I am curious about in flight overspeeds.
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Old 3rd Jun 2005, 11:04
  #557 (permalink)  

Senis Semper Fidelis
Join Date: Feb 2001
Location: Lancashire U K
Posts: 1,288

Hi how are you, I must suggest caution, if any overspeed has been flagged, one little ditty is always with me on this,

If in doubt, throw it out!!

Don't want anyone to go up in a machine like I once did!!!.

Peter R-B
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Old 3rd Jun 2005, 15:06
  #558 (permalink)  
Join Date: Dec 2000
Location: Ask the voices!
Posts: 435

I am well thanks! And yourself?

This is all hypothetical! (Thank goodness)

I am oh so aware of the dangers of flying in aircraft that have undergone such stresses, it is just that I don't have access to R44 tech manuals anymore!

Hopefully someone can have a quick read and post the info here for me!

Cheers guys
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Old 20th Jun 2005, 10:27
  #559 (permalink)  
Join Date: Jan 2003
Location: North West
Posts: 121

You may already know this but there are a few in Helidata:

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Old 20th Jun 2005, 11:20
  #560 (permalink)  
Join Date: Nov 2004
Location: Alba
Posts: 63
You could always try here:
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=8198854561&rd=1&sspagename=STRK% 3AMEWA%3AIT&rd=1

If you do buy a R44, I'll be happy to deliver it anywhere in the UK, for a small fee of course...

This seller also had a Raven for sale a couple of weeks ago, it might be worth sending them a mail.
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