Helicopter Performance 206 Long Ranger Question

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MatByrne
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Helicopter Performance 206 Long Ranger Question

Postby MatByrne » Tue Oct 28 2014, 20:45

Good morning all,
I am a student pilot (CPL) and am currently working my way through the Helicopter Performance and Handling Module, whilst at sea for work.
A question i am stuck on is the following;
Take off from a certain HLS is restricted to a maximum weight of 1773kg. The empty weight is 1055kg, and you have 4 passengers and 367lts of usable fuel on board. Ignoring the question of aircraft balance, what is the maximum weight of that may be uplifted in the baggage compartment?
Is there a standard assumed weight for a passenger if no weight is given as i am aware that there is a standard weight (minimum) for the pilot if no weight is given in a question?

Here's where i am at with my equation as i am not sure if they want fuel converted into kg or left as lts?

356kg
HEW 1055kg + fuel (367 x 0.97) + pilot 77.1kg= 1488kg without knowing the passenger weight
Max 1773 - 1488kg = 285kg
or
HEW 1055 + fuel 367lts + pilot 77.1kg = 1499.1kg without knowing the passenger weight
Max 1773 - 1499.1kg = 273.9kg
Thanks for your help in advance.
The 4 answers in the book are: 30kg, 36kg, 100kg and 113kg
Split Pin
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Re: Helicopter Performance 206 Long Ranger Question

Postby Split Pin » Mon Nov 3 2014, 09:24

It would be a guess, but the answer may have more to do with the maximum weight allowed in the baggage compartment as stated in the flight manual.

Or not.
Dauphin
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Re: Helicopter Performance 206 Long Ranger Question

Postby Dauphin » Mon Nov 3 2014, 09:31

Your fuel weight calculation is incorrect. Multiply your litres by .79 not .97.
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Eric Hunt
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Re: Helicopter Performance 206 Long Ranger Question

Postby Eric Hunt » Mon Nov 3 2014, 10:28

If the pax weight allows it, you can probably lift the max, which from memory 13 years ago, was 250 lb or the nearest is 113kg
Zabar
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Re: Helicopter Performance 206 Long Ranger Question

Postby Zabar » Mon Nov 3 2014, 11:36

I think Eric is probably on the money for that one.
Turning base
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Re: Helicopter Performance 206 Long Ranger Question

Postby Turning base » Tue Nov 4 2014, 05:48

Yep, it seems like one of those 'trick' question. The answer is 113kg as previously suggested which is the max allowable in the baggage compartment.
MatByrne
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Re: Helicopter Performance 206 Long Ranger Question

Postby MatByrne » Tue Nov 4 2014, 19:06

Thank you all for your help :-)
Cheers
MatByrne
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Re: Helicopter Performance 206 Long Ranger Question

Postby MatByrne » Tue Nov 4 2014, 19:30

Thanks again to all that helped answer this curve ball quetion.
I have run the numbers again after doing some research and from what you guys had said.

HEW = 1055kg
Fuel = 367 lts (367 x 0.81 = 297.3kg)
Pilot = 77.1kg
Passengers = ??? So assuming passengers are on average weigh 78kg (4 x 78 = 312kg)
Total weight onboard = 1741.4kg
1773 - 1741.1 = 31.9kg

The answer in the text book says its (A) 30kg max baggage allowable.
I have only guessed what the average passenger weight is though and this is the closest I could get to the above answer.

Thanks again for your help it means a lot to a student pilot to be able to get help from those who know :-)

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