Nattspor Vognverk · Trysil · est. 2009 · 22 machines a year
We build one machine. The T4 Løypemaskin is 2 050 mm over the tracks, runs 2 h 40 on battery alone, and goes where a five-metre piste machine has to turn round.
2 050
mm over the tracks
0.084
bar ground pressure
58
dB(A) at ten metres, silent mode
6.1
litres an hour, working average
Trysil, 22:40, −9 °C. The cutting below the shed, the night before machine T4-0039 was handed over.
Plate 1 · T4 Løypemaskin · 1:20 · drawn, not photographed
Pass two · downhill · seam at 18 mm
A trail centre buying one machine cannot afford to find out in February that the heated wings were an extra. So the T4 ships one way, and the list below is what comes off the floor at Skistuvegen 14 before anybody has chosen an option.
Pass three · uphill · 11 % · seam at 32 mm
Everything else on a groomer is a preference. These four decide whether the machine can work your trail at all, so they are the four we publish first and the four we will argue with you about on the telephone.
Uphill · 11 % · 32 mm
Mass · footprint
Two 700 mm belts over 2 920 mm of contact give 4.09 m². Loaded, the T4 presses at 0.084 bar — about a third of what a person in boots puts through the same snow, which is why it can be on a 20 cm fresh fall at midnight instead of waiting for it to settle.
Drive
The engine only ever charges. Each track is turned by its own motor, so a counter-rotating turn in a two-metre lay-by is a software matter rather than a hydraulic one, and the machine holds a straight line across a camber without a hand on the levers.
One shift · 21:00 to 05:00
The pack takes the first two hours and forty minutes, which is exactly the length of the loop that passes the cabins. The engine starts at 30 % and runs flat out at its best point for the rest of the night. Nobody has ever rung us about the noise.
Refusals
We have turned down eleven enquiries in six years for the first two reasons and we will tell you on the first call, not after a site visit you paid for.
All figures measured on machine T4-0037 over the 2025–26 season, loaded, blade down, with the standard tiller. Your trail will differ; we will come and measure it.
Nattspor
Pass four · downhill · the only decision you make before the options
The tiller is the one thing that cannot be changed later without the machine coming back to Trysil for a week. Everything else on the list is bolted on, and most of it can be bolted on in your own shed four winters from now.
2 600 blade
2 400 tiller
Finisher mat
11 lamps
42 kWh
22 kW inlet
Two seats
6.4 m² glass
Trail toolkit
6 spare bars
Paper manual
2-day handover
Every machine carries this plate on the left rail, stamped the day it leaves. The blank is filled in by hand.
Pass six · the whole round · 27 km · eight hours
We test every machine on the same loop before it leaves, because we know what it should feel like at each turn. This is that loop, in the order it is cut.
21:00 · the shed · −6 °C
Lights on, engine off. The first 7 km are flat and the machine takes them silently at 7 km/h, blade carried, tiller down. The seam behind it is 18 mm and you can hear the belts on the snow.
Photograph: the Fageråsen shed from the car park, 20:52.
23:40 · the bridge · −8 °C
The footbridge over the Nybekken is 2 400 mm between its rails. A 2 050 mm machine crosses it at walking pace with the wings folded; a five-metre machine turns round in the lay-by and the far loop never gets cut.
Photograph: the approach cutting, taken from the cab step.
01:15 · the climb · 38° · on the winch
The genset has been running since 00:40. The winch takes the last 300 m of the climb and the pack charges while it pulls, so the machine reaches the turn at 1 012 m with more battery than it started the climb with.
Photograph: the anchor lamp at the top of the climb, 01:22.
04:50 · back down · the seam
The return run overlaps the outward one by 300 mm the whole way. Where the two passes meet, the corduroy changes pitch — that line is the only thing anyone will see of the night, and it is the thing we judge the machine on.
Photograph: the seam at the 3 km marker, 08:10 the next morning.
Pass seven · downhill · the telephone
In order of how often. If your question is not here, the shed telephone is +47 62 45 18 03 and Sigrid usually answers it.
Yes, at 8 km/h grooming with turn-arounds, with roughly ninety minutes spare. Past about 35 km you are into two shifts or two machines, and we will say so rather than sell you a machine that is late every morning.
The genset starts automatically at 30 % and the pack is heated off its own output. The machine has never failed to start below −31 °C on test, and the cold-start procedure is one page in the paper manual.
You do, for everything on the trail: belts, grousers, tiller teeth, lamps, filters. Those are on our shelf in Trysil and go out the same day. For the pack, the motors and the inverter we come to you — there are nine of us and we have never been more than two days away.
20 % on signature, 50 % when the frame is welded and photographed, 30 % on handover. Several clubs split the last payment across two seasons; ask and we will write it into the order.
On 120 nights at 27 km: about 5 000 litres of diesel, 9 400 kWh off the shed socket, one set of grouser bars, two sets of tiller teeth and a tin of touch-up paint. We publish last season's figures from three customers on request.
If the deck is 2 200 mm wide and rated at 4 tonnes, yes, with the blade off. Otherwise our 5 t trailer is € 14 600 and is road legal in Norway, Sweden and Finland without a permit.
We load it, we drive it, we hand you the keys at your own shed door. Two days, both of us, in the price.
Pass eight · the last one · uphill, then home
Tell us the width of your narrowest bridge, the steepest thing you have to climb and how many kilometres you cut in a night. We will tell you whether the T4 is the right machine before we tell you what it costs.
Next slots: week 7, week 11 and week 16 of 2027. Deposit € 53 680. Prices ex works Trysil.
The road down from Fageråsen at 05:40, after the last pass. Photograph: Amina Bakke.