FINISHED - Scammell Pioneer SV2S Heavy Breakdown Tractor - IBG Models - 1:35 Scale

[CDW]

The Scammell Pioneer SV2S Heavy Breakdown Tractor will be my next project. First, a little history behind the tractor (borrowed from Wikipedia) then some photos of the box and instruction sheets before beginning the build.

 

Designed as a 6×4 off-road vehicle for use in Britain's colonies where sealed roads were scarce, the Pioneer was first produced in 1927. Though lacking all-wheel drive, its combination of a suspension with great travel, excellent traction, and a low-revving engine gave it impressive pulling power on rough ground at low speeds.

Though not designed for military use, the British War Office purchased a single petrol engined example in 1932. Equipped as a tank transporter with a permanently coupled 18t semi-trailer, it was assigned to a training unit but did not initially catch on. Additional transporters were not purchased until 1937.

 

From 1936, the British Army began to receive Pioneer heavy recovery vehicles. The first 43 delivered were designated the Pioneer SV1S[1] and the Pioneer SV1T both with a 3-ton folding crane and lockers for recovery equipment and towing bars. Most of these early Pioneer recovery vehicles were lost with the BEF.

The Pioneer SV2S[2] had a simpler redesigned extending crane that provided greater lifting height. It was Introduced in 1938 and remained in production throughout the war, with a total of 1,975 built by the end of the war.

Among the Pioneer's equipment was a pair of tracks that could be fitted over the two rear wheels, converting it temporarily into a half-track and giving greater traction on soft ground.

The last Pioneer recovery vehicle was not retired from the British Army until the 1980s in Belize.

 

Edited May 12, 2020 by CDW

[Egilman]

Definitely pullin up a big comfy lounger for this one....

 

 

[mtaylor]

I'm pulling up a seat.  

[Old Collingwood]

This will be good  Im  bringing a bed  far more comfy for the journey.

 

OC.

[popeye the sailor]

don't forget your bunny slippers   

 

if this isn't one rugged truck........nutt'in is      gotta be a huge decal sheet!    if OC falls asleep,  fire it up right off the manifolds.......that ought to wake 'em!   

[Jack12477]

I'm in too 

[Edwardkenway]

Late again😟 are there any seats left?😉

[Canute]

Room for one more. I'll bring some Carolina BBQ, too.

[CDW]

Steps 1 thru 4 yields 7 tires/wheels assemblies, a stowage basket, a fuel tank, and the basic engine minus some details that come along in later construction steps. The plastic moldings are very nice. The plastic is unusually soft so one needs to take care so as not to gouge or accidentally cut it. The kit comes with one sheet of photo etch for details.

 

The tire/wheel assemblies are 3 each per tire tread rotation pattern, and one spare tire.

 

The stowage basket.

 

The fuel tank.

 

The engine.

 

[lmagna]

I'm in. No need to find extra room I will find a place, Usually somewhere in the rafters. Now that I am getting to the OD section of mi build I need some lessons on how to properly spread it around and make it look right. 

[CDW]

 

[lmagna]

Love the patriotic music. 

Actually quite the maneuver getting that tank out the way they did. When I was stationed in Ft. Sill for my AIT training the vehicle they used to retrieve tanks was: 

 

 

And it was only considered a medium recovery vehicle!

[CDW]

Just now, lmagna said:

Love the patriotic music. 

Actually quite the maneuver getting that tank out the way they did. When I was stationed in Ft. Sill for my AIT training the vehicle they used to retrieve tanks was: 

 

 

And it was only considered a medium recovery vehicle!

Nice photo!

M88?

[CDW]

I have a fascination with recovery vehicles of all types. It's something that grew on me while being around heavy equipment recovery on pipeline work. I like the massive power, the pulleys, gears, and cables, as well as the strategies used to recover heavy equipment.

[lmagna]

8 hours ago, CDW said:

M88?

Yes, one of only two recovery vehicles I ever saw up close. The other was the M578 Light Recovery Vehicle. 

I never got any closer than just seeing them but they seemed pretty big to me at the time. 

I even have a kind of war story about them. We had a lieutenant who was giving a speech on these vehicles and as a side note he was explaining how the track system had two modes, the road mode where the wheels were locked out and made everything stiff and allowed the vehicle to travel faster on smooth surfaces. And the unlocked mode , where each wheel was allowed to rise and fall over whatever obstacle it came across, letting the vehicle have a more stable ride over rough terrain. To prove his point he threw the stainless thermos he had been drinking coffee from under the track and told the driver to move forward. I have no idea if the driver knew what was going on or not, but instead of the wheels rising over the thermos when the first wheel reached it the thermos spit out it's lid and flattened like a squished banana! The wheel and of course the vehicle didn't even attempt to rise over the thermos! It seems that the suspension was in lockout mode!

 

I don't think I ever saw either type of vehicle ever again.

Edited April 27, 2020 by lmagna

[CDW]

Steps 5 thru 8 yields a more detailed engine, a radiator, a differential with primary drives and hubs, and the front suspension/axle/hubs.

 

The engine received more details including the fuel injectors and a photo etch fan. I have drilled out the injectors to add fuel lines (not included in kit). Will also add some scratch built linkage to the injectors.

 

I have never built a model kit with a more detailed radiator, at any scale. This radiator was an assembly that even included the two separate radiator cores inside. Amazing.

 

The massive differential with primary drive units and hubs

 

The front suspension with hubs

 

 

[popeye the sailor]

look'in good     

 

[Egilman]

Pretty beefy suspension there, it wasn't fast, but it would pull just about anything.... (the Germans used it to recover tiger tanks amongst other things) It had such a high reputation that all sides used them when they could get their hands on one....

Edited April 27, 2020 by Egilman

[CDW]

Just now, Egilman said:

Pretty beefy suspension there, it wasn't fast, but it would pull just about anything.... (the Germans used it to recover tiger tanks amongst other things) It had such a high reputation that all sides used them when they could get their hands on one....

Yes, the big Gardner 6 cyl diesel engine was the source of that power and reliability. The kit comes with the markings for a number of different countries that used them, including Nazi Germany.

Here is an interesting little video on the Gardner 6 cyl diesel. This one is being used in a marine application, but the old mechanic testifies to the reliability of the engine.

 

[CDW]

Steps 9 thru 12 14 dealt with the chassis, the main winch, and the power take off.

 

The chassis. Lots of pulleys and rollers to utilize the winch and cables in heavy vehicle recovery operations.

 

The winch.

 

The power take off. 

Edited April 28, 2020 by CDW

[CDW]

Subsequent assembly/construction steps deal primarily with assembling the previously constructed sub assemblies. I need to decide now how I want to paint this model as it will be easier to paint the sub assemblies before assembling them I think, particularly some of the smaller parts that need attention to paint details.

[Old Collingwood]

I think it makes it more interesting to paint seperate assemblies  - like mini  jobs.

 

OC.

[CDW]

A dry fit of the chassis/drive train sub assemblies.

 

[lmagna]

The rear differential assembly has an odd shape like it has standard axles out to the outer assembly then possibly chain driven out to the wheels? Do you have any information on how this was done, chains or gears?

[Egilman]

1 hour ago, lmagna said:

The rear differential assembly has an odd shape like it has standard axles out to the outer assembly then possibly chain driven out to the wheels? Do you have any information on how this was done, chains or gears?

It used standard axles internally to a sprocket that drove a dual linked roller chain to stub axles supporting a hub and rim/tire... The chain casing being designed in it's entirety as the beam unit of a walking beam suspension.... A very simple suspension low revs but very strong......

[CDW]

Here the chassis sub components and drive train are assembled and painted in olive drab.

 

[Old Collingwood]

Looking geat Craig.

 

OC.

[popeye the sailor]

chassis looks splendid!  

[CDW]

Steps 19 thru 28 deal with the body, bed, and boom. I got so carried away with building and painting the body and bed, almost forgot to take photos.

The body, bed, and boom sub assemblies have been completed and painting has been started. Because this body and bed has so much wood in the construction of it, I decided to take some artistic license to paint it in a natural wood color with only the framework in olive drab. Maybe before I'm done with it, I'll put OD over the wood and do some scuffing/chipping, wear and tear, to show off the wood underneath. Haven't decided for sure yet.

Anyway, here's where I am with painting the body/bed assembly right now. Just a Vallejo wood color with a Vallejo burnt umber wash, so far. Before it's all done, will add more wood tones to make it look more authentic.

 

 

[popeye the sailor]

to me....I wouldn't ..........you did a great job imitating the wood    maybe muck it up a little?