Hitching a lift: flying in the UK’s EH101 Merlins

I fulfilled a long-held ambition a few weeks ago, when I got the chance to tick another UK military aircraft type – AgustaWestland’s EH101 – off in my flight log. Surprisingly though, it turns out that Merlins (as EH101s are known in the Royal Air Force and Royal Navy rotorhead communities) are a bit like London buses: wait long enough for one and two will turn up at the same time.

Merlin cousins.jpg

I’ve been writing about the Merlin for quite a few years now, and one of my most exotic media trips was linked to the early development of the RN’s HM1 version. This came in March 2000, when I visited the Atlantic Undersea Test and Evaluation Centre, or AUTEC, on Andros Island in the Bahamas. But I had never been given the opportunity to fly in the type until I recorded a double milestone during a UK Defence Logistics Organisation (DLO)-run media visit to RNAS Culdrose in Cornwall last month.

The Merlin seems to have been around for a very long time now, but the DLO describes the RAF and RN aircraft as “fleets in growth”, and adds that it will not be until next year that the type will be declared as having reached full operational capability. This will represent the frontline availability at any one time of 15 of the RAF’s 22 Merlin HC3 transports and 30 of the RN’s remaining 42 Merlin HM1 anti-submarine warfare/multi-mission helicopters; another two of which have been destroyed in accidents.

After touring the UK Defence Aviation and Repair Agency’s Fleetlands site – home to “depth” maintenance of the UK’s AgustaWestland Lynx, Westland Sea King and Boeing CH-47 Chinook helicopters (including a damaged Chinook HC2 freshly returned from Afghanistan) – I hopped aboard a navy Merlin HM1 for the flight to Culdrose. Also travelling with us were a second RN aircraft and a Merlin HC3 from the RAF’s 28 Sqn.

Merlin HM1.jpg

Sitting at one of the rear operator’s consoles in the 824 NAS-operated aircraft, it was hard to believe that the HM1 is on track to receive a major systems upgrade worth £750 million ($1.4 billion), as at first glance its flat screen displays and sophisticated lay-out seem cutting edge. But some of the aircraft’s computer systems were already obsolete before the aircraft entered frontline use, making it difficult and expensive to support, and crew members say the operating system is cumbersome to use, due to its lack of touch-screen controls. With new displays and an open architecture mission system the aircraft will be easier to use and simpler to modernise in the future, they say.

The HM1 offers a really smooth ride – so much so in fact that when I moved to a forward-facing seat at the rear of the aircraft about half an hour into our 90min flight I even managed to go to sleep for about 15min. After descending through the clouds and into a murky Cornwall afternoon our tour resumed with a look at the Merlin depth maintenance facilities at Culdrose, which are used to support aircraft for both services.

Merlin HC3 overhaul.jpg

My flight back to Fleetlands was in an RAF Merlin, call-signed Vortex. This feels like a different beast to the RN aircraft due to its large and largely empty rear cabin; it’s only once you sit facing sideways inside the EH101 with the HC3’s tail ramp open that you get a real sense of the platform’s size. The ride wasn’t as smooth as in the HM1, as you’d expect in a troop transport, but it was still a very different experience from riding in a Chinook. It’s also an odd experience kneeling up front and chatting to your helicopter pilots for five minutes before realising that neither of them are actually doing anything much, thanks to the Merlin’s autopilot.

Merlin HC3 .jpg

Admittedly the UK still has some little way to go to get the best out of its maturing Merlin fleets, but planned upgrades to the HM1 and improved support and maintenance systems for both types are already beginning to make a difference on aircraft availability rates. With the RAF still maintaining a detachment of around five Merlins at Basra in southern Iraq, that can only be a good thing.

If you have an opinion about the Merlin or another nation’s EH101s then I’d welcome your comments below.

 

posted on Friday, October 13, 2006 4:20 PM by Craig Hoyle

# re: Hitching a lift: flying in the UK’s EH101 Merlins @ Friday, November 10, 2006 6:53 PM

I have heard that AW is contemplating putting a larger main rotor on the EH-101 (64 feet instead of the current 61 foot diameter main rotor). Since there is currently (roughly) only a 10 inch clearnace separating the main and tail rotors, I have heard that AW is thinking of tilting the vertical fin more to the left and also backwards to move the tail rotor back, instead of adding a "plug" into the empennage. Have you heard about this? Has AW done this already and are these modified EH-101s flying?

Tom Stagliano

# re: Hitching a lift: flying in the UK’s EH101 Merlins @ Monday, November 27, 2006 11:37 AM

Hi Tom,
Sorry for the delayed answer (I was on holiday last week), but here goes:
There are no plans to enlarge the rotor diameter on the EH101, and the new BERP rotor which was flown for the first time recently has an increased anhedral only, so no airframe design changes are required.
Separately, AgustaWestland is about to flight test a new tail rotor for the EH101 using its civil demonstrator. This is half the diameter of the current system and is intended to handle more power for the US101 selected via the US VXX contest. I haven't seen it, but apparently it looks like a mini main rotor.
I hope that helps!

Craig Hoyle

# re: Hitching a lift: flying in the UK’s EH101 Merlins @ Sunday, February 04, 2007 12:41 PM

Do you know if AW will ever sell any civil EH101 or are any on order at there facilty. And is it true the MCA are intrested in the civil EH101 for MCA helicopter Harmonisation and bristows are looking at it again with mods like the doors and undercariage???

Jon