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-   -   Guimbal Cabri G2 (https://www.pprune.org/rotorheads/296022-guimbal-cabri-g2.html)

KNIEVEL77 4th May 2020 20:35


If already posted I will delete.

nomorehelosforme 4th May 2020 22:53


Originally Posted by Robbiee (Post 10771813)
If the industry had to rely on people who could both pay their way through life and save enough for training,...?

,...there'd be like ten pilots in the whole world! Seriously, when I was living in my car working two jobs I still couldn't afford flight school!

How very sad and heroic of you... life in the car must have been tough, having to fight for your parking space, hoping the food you had would be enough for the day, praying you didn’t get shot at in the dark and hoping your government pay check came at the end of the month.

Would have been similar if you had if you had joined the military but with better benefits.... rather than taking benefits!

homonculus 5th May 2020 12:21

Crab shows how to make a point with panache and style

Nomorehelosforme shows how to make the same point but to be offensive

WillyPete 5th May 2020 12:32


Originally Posted by [email protected] (Post 10771940)
Or, serve your country, join the military and get paid to learn to fly:)

Not always an option.

WillyPete 5th May 2020 12:43

The Cabri has a bit of a design problem at the firewall, abrading electric cables.
About two years ago, I was taking a flight with VVB (Now ICE Heli) and when lifting collective and getting light on the skids prior to hover, the display rebooted and the power dropped as though we'd hit the plasma ignition switch.
A bit of a "Woah, what was that?" moment, and moving over to the grass at Elstree we determined that it wasn't just at a certain collective angle, but when the ship vibrated a bit with the governor revving up for power demand.

We couldn't see what the issue was so shut down and scrubbed the flight.
Maintenance took a long time to find it but eventually found there was wear to cables coming from the cabin.

Then I spotted this in the news the other week:
https://www.bbc.co.uk/news/uk-englan...herts-51959648

Turns out that a different aircraft burnt down due to the same fault.
https://assets.publishing.service.go...CILR_04-20.pdf

Glad we caught ours before it got a bit serious up in the air.

If you're in one, make sure it's got the upgraded clips.

Robbiee 5th May 2020 14:27


Originally Posted by nomorehelosforme (Post 10772696)
How very sad and heroic of you... life in the car must have been tough, having to fight for your parking space, hoping the food you had would be enough for the day, praying you didn’t get shot at in the dark and hoping your government pay check came at the end of the month.

Would have been similar if you had if you had joined the military but with better benefits.... rather than taking benefits!

I don't know what about me living in my car stuck up your ass, but I wasn't receiving any government money.

Besides, the military wouldn't take me due to my asthma,...even if I had wanted to go that route,...which I did not!

Flying Bull 6th May 2020 14:27


Originally Posted by WillyPete (Post 10773231)
The Cabri has a bit of a design problem at the firewall, abrading electric cables.
About two years ago, I was taking a flight with VVB (Now ICE Heli) and when lifting collective and getting light on the skids prior to hover, the display rebooted and the power dropped as though we'd hit the plasma ignition switch.
A bit of a "Woah, what was that?" moment, and moving over to the grass at Elstree we determined that it wasn't just at a certain collective angle, but when the ship vibrated a bit with the governor revving up for power demand.

We couldn't see what the issue was so shut down and scrubbed the flight.
Maintenance took a long time to find it but eventually found there was wear to cables coming from the cabin.

Then I spotted this in the news the other week:
https://www.bbc.co.uk/news/uk-englan...herts-51959648

Turns out that a different aircraft burnt down due to the same fault.
https://assets.publishing.service.go...CILR_04-20.pdf

Glad we caught ours before it got a bit serious up in the air.

If you're in one, make sure it's got the upgraded clips.


Not really a design problem.

More a maintainence problem, assembling the parts incorrectly.

OK, in the aviation world we should try do design things failsafe, so incorrect assembly isn't possible - so just a little bit of design fault ;-)


WillyPete 6th May 2020 20:42


Originally Posted by ApolloHeli (Post 10773820)
Did you have a chat with Guimbal after this event? Was it confirmed to have been caused by the same issue as in the report you've referenced?

No, wasn't my helicopter.
I don't know if their maintenance did later.

I was shown the offending location a few weeks later and it's the same spot in the report that shows the new cable clip.

WillyPete 6th May 2020 20:47


Originally Posted by Flying Bull (Post 10774394)
Not really a design problem.

More a maintainence problem, assembling the parts incorrectly.

OK, in the aviation world we should try do design things failsafe, so incorrect assembly isn't possible - so just a little bit of design fault ;-)

Yup, as per the report:
"The helicopter manufacturer has completed a redesign of the clipping system to ensure the cable clipping cannot be installed incorrectly. The new design of clip is being fitted to new production helicopters and will be available via service bulletin from the manufacturer."

KNIEVEL77 2nd Jun 2020 07:09

When does anyone think Flight training will resume?
it looks like it could be a long while yet!

aa777888 2nd Jun 2020 10:42

It never stopped in the US, aviation was given "essential" status. Some training op's closed, of course, not sure how many.

KNIEVEL77 2nd Jun 2020 11:04

Wow, how can you keep the 2m rule in any aircraft never mind a Cabri?

aa777888 2nd Jun 2020 13:34

@KNIEVEL77 there is a discussion on that very topic in this Rotorheads thread: https://www.pprune.org/rotorheads/63...ronavirus.html

KNIEVEL77 14th Jun 2020 08:38


Originally Posted by aa777888 (Post 10800031)
@KNIEVEL77 there is a discussion on that very topic in this Rotorheads thread: https://www.pprune.org/rotorheads/63...ronavirus.html

That thread turned a bit political so I gave it a miss but they mentioned one Cabri school who have been flying for weeks although it may well have been all solo flights.

chopper2004 11th Nov 2020 18:37

Think there’s been another G2 accident apart from the Malaysian one, this time in Switzerland and a damaged Bell 505-

https://www.lenouvelliste.ch/article...a-sion-1004041


https://cimg3.ibsrv.net/gimg/pprune....f8c72c7ac.jpeg

ApolloHeli 11th Nov 2020 20:51

Looks like the Cabri tried a sneak attack on the 505 from behind but it was not very effective.

rotorfun 11th Nov 2020 23:13

To fend off those sneak attacks the 505 didn't go with an enclosed tail rotor.

Ascend Charlie 12th Nov 2020 02:57

The pilots were distantly related - in the 505 was Cutty Zarsov, and in the Cabri was Twista di Zarsov.

Agile 12th Nov 2020 04:42

always looks bad when two aircrafts from the same company bang into each other
will be hard to get a good deal on insurance for a while with that double claim

Arnie Madsen 12th Nov 2020 08:32


Originally Posted by Robbiee (Post 10771813)
If the industry had to rely on people who could both pay their way through life and save enough for training,...?

,...there'd be like ten pilots in the whole world! Seriously, when I was living in my car working two jobs I still couldn't afford flight school!

I did my first hours that way (Bell 47) ..... had a good job net 660 per week and every weekend 500 went to the flight school for an hour Saturday and an hour Sunday and I lived on the rest ... had cheap house rent but hardest part for me was parking my car and using the transit bus

All the other students in my class had parents who put up money or some had good credit and got loans ... one student his dad mortgaged his farm to raise cash.

Hot and Hi 22nd Nov 2020 18:56

Total Electrical Failure
 
Somewhere else here within the RH Forum, the consequences are discussed of a total electrical failure in case of a Robinson piston product (https://www.pprune.org/rotorheads/62...rnator+failure). As Robbie pilots know, if after an alternator failure one continues to fly until the battery is flat, the donkey would continue to run, but one would lose all electrically driven instruments incl the RRPM tach.

However, if for example in case of an electrical fire one elected to switch off both ALT and Master, the tach's would still be energised via a special circuit straight from the battery.

How does this work in a Cabri?

Mutley1013 22nd Nov 2020 19:25

Kinda the same, you flick the rpm warning backup switch on and that is direct from the battery. Not very granular, just tells you green or too high or too low rpm. It is good enough with the correlator to get you down safely while the fire rages.

ApolloHeli 22nd Nov 2020 19:45

2 Attachment(s)

Originally Posted by Hot and Hi (Post 10932394)
Somewhere else here within the RH Forum, the consequences are discussed of a total electrical failure in case of a Robinson piston product (https://www.pprune.org/rotorheads/62...rnator+failure). As Robbie pilots know, if after an alternator failure one continues to fly until the battery is flat, the donkey would continue to run, but one would lose all electrically driven instruments incl the RRPM tach.

However, if for example in case of an electrical fire one elected to switch off both ALT and Master, the tach's would still be energised via a special circuit straight from the battery.

How does this work in a Cabri?

Obviously the glass display (EPM) will no longer work if both the master & alternator are switched off / failed. The backup Nr indication system (BARC = "Boîtier Alarme Rotor et Carburant" or "Rotor and Fuel Alarm System") is run off a direct-to-battery connection.

The BARC system always provides backup power to a set of three lights (indicating Low Nr / Nominal Nr / High Nr range) and a separate "Low Fuel light" which is triggered by an independent float measurement system once there's about 14-16 litres in the tank left. The BARC also powers the "horn" which gives audio warnings at excessively high or low Nr.

I've attached the relevant pages from the RFM in case I've butchered the verbal explanation.

Mutley1013 22nd Nov 2020 21:16

A separate dedicated backup battery? Well I never knew that! Where is that shown on the wiring diagram and do you know where the backup battery is within the airframe? I can only think it would be in the console, is that right?

ApolloHeli 23rd Nov 2020 14:06


Originally Posted by Mutley1013 (Post 10932476)
A separate dedicated backup battery? Well I never knew that! Where is that shown on the wiring diagram and do you know where the backup battery is within the airframe? I can only think it would be in the console, is that right?

Ah damn it - now I look like a tool! I misread the "can be switched to a direct battery backup supply" as "can be switched to a backup battery supply". I believe you're correct in saying there is no second battery. I've corrected it now.

Mutley1013 23rd Nov 2020 16:10

LMAO, it isn’t exactly clear in the wording and that had me doubting everything I knew about the BARC to the point of thinking, where the hell is this battery then as I’ve not spotted it in any walkarounds/preflights! Openness to learn a new thing overriding what I knew to be false 😄.

I suspect people do not get much practise with no EPM display and no governor, one or the other, but probably not simultaneously.

Hot and Hi 24th Nov 2020 08:08

So much of a muchness then.

Can you confirm that - in case of a total electric failure and flat battery - the donk continues running? Just on the 1 set of magnetos, or will the electronic ignition (“plasma system ignition”) equally continue to work without supply of electric power?

Mutley1013 24th Nov 2020 10:02

The plasma is direct to the battery too, so the donk will continue to run on both ignition systems while the battery has the capacity to fulfil. Once flat, it will as you say rely on the magneto only. I would hope though in most scenarios the heli would be safely on the ground in the event of an electrical outage before the battery is flat.

WillyPete 24th Nov 2020 11:00

I mentioned earlier in the thread experiencing a "short" in the primary electrical feed to the cabin from the generator.
Granted, it was intermittent and we were still preparing to taxi prior to flight so not so serious.

All electronic systems lost. Engine grumbled and ran rough for an instant as the fadec was lost but the revs stabilised while in the hover.
Still enough power to put it back down while we tried to figure out what had happened.
It kicked in when collective was being raised and a minor vibration kicked in.
Felt similar to the drop when plasma is turned off during pre-flight.

CGameProgrammerr 24th Nov 2020 16:24

Yeah the reason they use one magneto and one EIS, and not two EIS, is so the engine can continue to run without electrical power due to the magneto. Otherwise power loss would mean engine loss.

ApolloHeli 24th Nov 2020 17:33

For those wondering, Guimbal states that the plasma will take >10 hours to drain the battery if the master were to be switched off.

Hot and Hi 25th Nov 2020 08:18


Originally Posted by ApolloHeli (Post 10933920)
For those wondering, Guimbal states that the plasma will take >10 hours to drain the battery if the master were to be switched off.

Yeah, I was wondering. Thanks for making this clear. Now in an ALT failure you do *not* switch off Master. The emergency procedure in a Robinson piston is to leave Master on, but switch off non-essential electrical consumers (lights, strobe, second radio, TPX, air con, RA).

The (non-documented) time the battery will last in this scenario is between 15 and 60 min before total electric failure, with an estimated median of 30 to 40 min. Not sure what drains the battery most, but essential consumers would include the gyro instruments, avionics fan, the remaining radio, any glass instruments and the panel-mounted EFB... Can't think of much else.

Would be the same in a Cabri, not? Only difference I can see is that from the point of total electrical failure in a Cabri you only run in one sets magnetos, so no more redundant ignition.

Robbiee 25th Nov 2020 14:58


Originally Posted by ApolloHeli (Post 10933920)
For those wondering, Guimbal states that the plasma will take >10 hours to drain the battery if the master were to be switched off.

What is the plasma?

Mutley1013 25th Nov 2020 16:01

It is the name of the electronic ignition system.

HeliHenri 29th Dec 2020 11:33

.
The Cabri G2 is now certified in Russia. :ok:

We'll see at last funny videos with the G2. :}
.

WillyPete 29th Dec 2020 16:53

Hope they have their dash cam.

Abarth59571 30th Mar 2021 14:51

Hi Guys,
Can anyone give me a contact of how to find out a definitive list of which FTOs operate the Cabri in the UK please?
I already have 35 hours and need to finish off the course after a long Covid break.
Many thanks.

Bravo73 30th Mar 2021 16:09


Originally Posted by Abarth59571 (Post 11019268)
Hi Guys,
Can anyone give me a contact of how to find out a definitive list of which FTOs operate the Cabri in the UK please?.

I think that Heligroup are the UK agents for Cabri: https://www.heligroup.com/cabri2/

Maybe if you emailed them they could provide you with a comprehensive list of all of the Cabri operators in the country?

Mutley1013 30th Mar 2021 18:20

Cabri are to be seen in Fairoaks, Goodwood and Lee-on-Solent, but that might not be of any help if you are North East based!

Abarth59571 30th Mar 2021 18:25

Many thanks.


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