EC 135 Empty Weight
 

What is a typical (realistic) empty weight of an IFR equipped EC 135 P2/T2 in HEMS configuration?

What will the endurance typically be with 3 persons on?

Thx,

About 2100kg with [currently] a 2835 MTOW; take away 270kg for crew leaves 465kg, so say just over 2hrs before it all goes quiet.

Thanks malaprop,

What is a realistic fuelburn and cruise speed at these weights?

Malaprop, you're not living up to your title! Shirley you should have written:

"About 2100kg with [currantly] a 2835 MTOW; take a weigh 270kg for crewe leaves 465kg, so say just over 2hrs be four it all goes quite." ?:E

130kt, 200kg/hr give or take a couple of %

212man - not really, those are misspellings. "Until it all goes quaint" perhaps...

But you can have your T2/P2 urgraded to a T2i/P2i which will give you 2910kg.

OEI possibilities
 

I've been told that EC135 can hover (HIGE) with one engine like 2600kg, OAT 20 celsius, PA 1000ft conditions. I cant believe that. Or should I? How about HOGE?

EC135 P2 Current AC with the following:

3 Screen (SMD 68 LHS)
Autopilot
Wire Strike Protection
Air Conditioning (Mechanical Not ECD)
Pop Out Floats
FM VHF UHF
Sat Com Iridium
TCAS
Dual Garmin installation
VIP Interior

Empty Weight = 1958 kg direct from RFM not a guess

2850 - 1958 = 892 kg Useful

OEI HOGE 1000' +20C ~ 2570 kg

Fuel Flow 185~195 kg/hr

Certain P2's and T2's are economic to upgrade to P2+ or T2+ which gives same performance as P2i or T2i i.e 60 kg increase in MTOW

Compare to PC1 requlation
 

So, if you have:
- Empty weight (with HEMS equipments) = 2100 kg
- 3 crew = 255 kg
- fuel 1h 20 min (190 kg/h) ~ 253 kg

Total mission weight is 2608 kg. Can you meet all CAT A segments (1 and 2) with this weight?

Examble OAT 20 C, PA 500 ft, Weight 2608kg:
If you lose one engine before LDP with CAT A helipad landing procedure to Hems Hospital Site. What would be the Vtoss that enables you to continue your flight to meet segment 1 (ROC 100ft/min to 200 ft) in CAT A?



Hostile

Vtoss would be 40 KIAS and doesnt change!

I think the answer you are looking for is the gradient in those conditions for Segment 1.

2 MIN Power OEI

My calculations say it would be ~20% ~ 11.3 degrees.

At 1.5% Segment 1 the aircraft could be at MTOW and ~ 42 C

You would achieve 200' in 1000' horizontal at 40 KIAS ~ 4000 H fpm~ 15 seconds ~ 800 V fpm.

Segment 2 MCP OEI Vy 65KIAS at those numbers would be ~ 6% or more all the way up to ~ 12-13,000'

1000' above departure at MTOW and 42 on the ground, the gradient would be ~ 2%.

NIL WIND in all of the above and data is for P2.

:cool:

Malaprop, quite right: I shall deceased from smart comments:ok:

Thanks RVDT,

That's what I'm looking for.

Hostile:ok:

I have heard from some people that the EC-135P2 is so powerfull OEI that you don't have to comply with the JAR-OPS 3 obstacle clearance and take-off /landing distance requirements i.e. it is able to climb vertical OEI at MTOW?

On the other hand I have heard some pilots saying that during warm summer days they have had problem to have enought power AEO to become airborne with a patient onboard (4 persons onboard)?....Maybe they have just been overweight??

Eddie is right in his first paragraph; don't confuse the 135's OEI capabilities [which are very good] with its AEO, which at MTOM are much less impressive. Not sure where he gets his empty weights from, even though it's a DPIFR; ours is a police one SPIFR but I know the earlierl statement of UK HEMS ones being about 2100kg is fairly accurate - of course it depends on what you specify as an "EMS fit".

So your typical weight less fuel and crew but including everything else would be.....?

Thanks Eddie 1 and Droopy for your replies:E

Vertolot,