November 2024 Part 1

Hiller HT.1

Westland Wessex HAS.1

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Hiller HT.1

705 Naval Air Sqn,  RNAS Culdrose / Gosport 1954

LF Models 1/72


The Hiller HTE-2 (OH-23) first flew in 1948 and 20 examples were procured by the Royal Navy (with US Govt. support) in 1950 as the HT.1 and HT.2 rotary-wing training aircraft. Most were used by 705 Sqn at RNAS Culdrose, although one was fitted with pontoon floats and served at sea onboard the survey vessel, HMS VIDAL.  


Powered by a six-cylinder horizontally opposed Lycoming petrol engine that produced around 200 hp,  it was a very simple design, with Hiller’s “Rotomatic” cyclic main rotor system using manually controlled small paddle blades  set at 90 degrees  to the main ones to effect cyclic control.


The initial batch of 20 HT.1s were former US Navy HTE-2s, with a further 21 UH-12E variants delivered later as the HT.2, with a larger “Goldfish Bowl” canopy.   One distinctive and unusual feature of the Hiller was that the port cyclic control lever was actually outside the cabin, requiring a modified door to be fitted when an enclosed cabin was needed.   


The aircraft depicted by the kit decals is XB475, an HT.1 (HTE-2) of 705 Sqn which crashed at Gosport in 1954 during a display practice by 3 Hillers, after the lead helicopter suffered a mechanical defect and turned sharply, causing XB475 to take avoiding action that led to a loss of control later blamed on a slipping clutch. The pilot, Lt RA Moss RN was killed. As it hit the ground, the helicopter's blades missed a small baby in a pram by inches. Lt Moss' own wife had given birth to their third child only 5 days earlier.


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Building the LF Models HT.1 Kit:


The last few years have seen a plethora of new helicopter kits from Czech company LF Models. These are modern CAD designed kits using short run moulds and they have covered a number of long-desired modelling subjects, such as the Sikorsky/Westland Dragonfly (kitted many times, but none of them easy to build or entirely satisfactory when finished), the Westland Wasp and Scout (at long last) plus this, the diminutive Hiller HTE-1/HTE-2.


The Hillier has long been an obvious gap in my early RN Helicopters collection, one where I have sometimes considered if a scratch build might be feasible, since it seemed a relatively simple airframe shape.  LF's model is not cheap, but looks to be cleanly moulded and reasonably accurate shape. There are 2 sprues of grey plastic and a third clear sprue.  In this issue, a small decal sheet covers two US Navy aircraft (an HTE-1 and an HTE-2 - the difference being that the HTE-1 only has a single nose wheel) plus a Royal Navy HT.1 from 705 Sqn.


It's not an easy build, as the airframe is in fact deceptively complex and delicate to assemble. Parts on the sprue are not numbered and there are a number of very similar looking alternative parts, so you will need to use the sprue diagram on the instruction sheet to identify the correct item. The cockpit goes together well, but the engine, which is a key part of this model, is extremely fiddly, with some poor fitting parts and ejector pin towers in very awkward positions.  Getting the rotor mast to sit upright is not an easy task either, since there is little to use as a reference point on the kit; assembling this and the engine struts are a bit of a juggling feat.  The indentations on the rotor deck do not seem to match the engine parts, which left me confused.  I decided eventually, after a few tries, to fit the engine to the deck first, then build up the supporting struts.  In the end it went together and came apart again several times before I was content. The task of then adding the rear fuselage and tail boom is equally fiddly, although fortunately, the upper tail boom strut does help to place the parts in the correct position.  Nevertheless, the joints were not neat and needed some filling afterwards, not easy since access had become somewhat limited by then.


LF have provided only one part of the 3 part rear undercarriage on each side, and you are expected to cut the remaining parts from plastic rod. Assembling these is another delicate task; I assembled one side, left it to set, then assembled the other side. Whatever you do, this model will be a tail sitter and there is really no space to insert any weights, nor would the every thin undercarriage legs be up to supporting much.  As a result, I have added a small prop underneath the rear fuselage (in the form of the tail skid that is actually intended to be there) to hold it up. Although I measured the plastic rod carefully in accordance with the instructions, they were clearly too long as the tail sits far too close to the ground, but this does allow me to use the skid as a prop.


The rotor head is very much simplified, perhaps inevitable given its very small size, although I do think moulding the top spider might have been possible. It is also very delicate and I have my doubts that the blades will remain attached for very long.  I beefed mine up by flooding superglue over the blade joints afterwards and added some of the more obvious control rods from bits of sprue and wire, plus the missing top spider. I also used wire to create a loop DF antenna for the top of the cabin roof as his is quite distinctive on RN aircraft.


Painting posed a small conundrum.  LF suggest the RN aircraft are dark blue, like the USN aircraft.  I could accept this as possible, except that the very limited colour photographs I have all suggest that it should be the "RAF blue grey" used on most other RN helicopters.  of course, it is possible that the aircraft were repainted at some time in their more than 20 years of service, but I have gone for the blue grey.


Painting the canopy proved to be straightforward, as it has nicely defined frames (I painted these by hand, but since it has quite a complex shape, I could imagine that masking might be quite challenging). At this point the slightly translucent nature of Xtracolour enamel proved a bit of an nuisance, forcing me to apply a second coat on the frames. The ports window/door has two options to accommodate the fact that the port collective lever actually sits outside the door (how bizarre).  My pictures of RN aircraft show the bulged door rather than the half open one, which is, I guess more appropriate to the British weather !


Attaching the canopy is another area that requires a lot of care.  I fixed the lower front edge first, then attached the top rear section (carefully ensuring the inevitable adhesive spillage in a very obvious place !!!!). I then attached the doors, starboard first, then port.  Unfortunately the fit of my port door was interfered with by the nose wheel and the port collective.



Although my nose wheel is fitted exactly where the guide holes place it, it does seem to be too far back, hence the clash. Some careful juggling got it into an almost acceptable position, with Kristal Klear white glue filling the remaining gaps.




The RN part of the decals is simple with only three decals for each side of the tail boom (roundel, serial. RN title and danger marking). As I suspected, they are quite translucent, but this didn't cause any problems once applied and they are finely and accurately printed. More of an issue, the clear backing film is continuous, meaning that you have to trim each decal very carefully to enable its application.  I really shouldn't be falling for this sort of trap at my age, but sadly I did and had to trim them after I had wetted the parts of the sheet.  The film is also very thick, which doesn't help them to settle down on the ribbed tail boom; despite applying them to a Klear-wetted surface, I then had to use decal softener to get an acceptable result, followed by a Micro Satin top coat.


This is a tiny little kit that looks the part when complete, but is a frustrating build and will be very delicate when complete. It is also comparatively expensive.  Like an older “cottage industry” product, LF only really provide you the main parts as a basis for a build and whilst these have good detail and fit together well, many additional scratch parts will be needed to make it look a convincing replica.


If I were doing it again I might consider adding some interest e.g. with a pilot figure wearing a white RN Officer's hat! Nevertheless, I'm certainly glad I now have this model in my collection, but I can only recommend it to those who really want a Hiller kit and are up for some old fashioned modelling.

 



Link to Part 2 - Westland Wessex

Below: Together with some of my other small early helicopters, a Westland Sioux AH.1 and a Sikorsky R4:

Above: © IWM (A 32877)  The subject of the model makes a rare deck landing.

Below: A Hiller currently sits in the Fleet Air Arm Museum’s Cobham Hall reserve collection.

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