How many Military Air Transport Case units does a spares store need?

Answer: About 120 cases at 200 cycles a year, with latches rated for 2000 openings; a repair team carries 8.

Why does a field repair case care about opening speed?

Answer: Repair happens on the apron, so all 42 tools must be visible within 30 seconds, hence three folding trays.

How many shock mounts do instrument cases need?

Answer: Eight, tuned to 12 Hz with 25 mm of travel; twelve stiffens the cavity and passes vibration inward.

What surface resistance does a segregation case need?

Answer: Below 10^9 ohm, with an M8 earth stud and a bond of at least 4 mm²; net weight under 60 kg, three separate locks.

Military Air Transport Case: 5 Applications

Q: How long can a cold chain case hold temperature?

Answer: A 28 L cavity with 30 mm vacuum panels and 5.2 kg of phase change material holds 2 to 8 °C for 72 hours at 35 °C.

Quick answer: A Military Air Transport Case covers five applications: spares rotation, field repair, instruments, cold chain, and hazardous goods. Each asks for a different cavity, liner and quantity.

Five Application Types and How to Sort Them
Spares Rotation and Field Repair
Precision Instruments and Optical Payloads
Medical and Cold Chain
Ammunition and Hazardous Goods Segregation
FAQ

1. Five Application Types and How to Sort Them

Sort by three variables: trips per year, climate control, and isolation between cases. Trip count sets the latch, control sets the valve, isolation sets the compartments.

The boundaries are clean. Spares rotation is judged on cycles, field repair on opening speed, instruments on shock, cold chain on hold time, hazardous goods on segregation and dissipation.

Application	Trips a year	Unit weight	Liner	Key figure
Spares rotation	200	20 to 40 kg	30 mm EVA	2000 latch cycles
Field repair	60	15 to 25 kg	Three trays	Full view in 30 s
Instruments	20	30 to 45 kg	8 mounts	12 Hz
Cold chain	30	18 to 22 kg	Vacuum panels	72 hours
Hazardous goods	10	50 to 60 kg	Three compartments	10^9 ohm

A mid-sized store turns 120 cases a year, a repair team carries 8, instruments run one per unit plus 20%.

2. Spares Rotation and Field Repair

Spares rotation is defined by repeated opening. At 200 trips a year the latch must hold preload after 2000 cycles, or it opens itself in vibration. Stainless hinge pins run 6 mm.

Military Air Transport Case: four olive green cases on a hangar conveyor, one open on a pallet with grey foam and metal parts

Field repair cases in this Military Air Transport Case family are sized from the tool set. A 42-piece kit takes a 780 mm by 520 mm by 340 mm cavity and three trays, with every tool visible within 30 seconds of opening.

Neither type needs more than IP65; what matters is a label-friendly surface and corners built to 6 mm for vehicle beds.

Use	Cavity	Trips a year	Key feature
Spares rotation	900 by 600 by 400 mm	200	Draw latches, 6 mm pins
Field repair	780 by 520 by 340 mm	60	Three folding trays

3. Precision Instruments and Optical Payloads

For instruments the case is the shock absorber. A 32 kg payload sits on 8 mounts tuned to 12 Hz with 25 mm of travel, which holds cavity acceleration under 3 g at 80 km/h on a road.

Eight mounts, four at the base corners and four on the sides, load the cavity evenly; twelve stiffen the box and pass high-frequency vibration inward. Hardness is graded too, A30 at the corners and A25 at the sides.

Liners run 30 mm EVA with 5 mm gaps between pockets, and a 10 mm soft foam layer in the lid holds the payload down.

4. Medical and Cold Chain

Cold chain is measured after the power fails. A 28 L Military Air Transport Case with 30 mm vacuum panels and 5.2 kg of phase change material holds 2 to 8 °C for 72 hours at 35 °C, with a logger sampling every 5 minutes.

Placement decides uniformity: two layers in the lid, one per wall, nothing on the floor, since a lined floor melts first and puts a 1.5 °C spike in the curve. Pre-condition the material for 12 hours.

These cases also get wiped down between missions, so the shell tolerates 70% alcohol and the gasket lifts out for cleaning.

5. Ammunition and Hazardous Goods Segregation

Segregation is the most demanding Military Air Transport Case build: three compartments, 50 mm flame-retardant dividers, one lock per compartment.

Surface resistance stays below 10^9 ohm, with an M8 earth stud and a bonding lead of at least 4 mm². Net weight stays under 60 kg; beyond that it needs lifting points.

A company-level element holds about 12 cases at three compartments each, with numbers moulded into the lid. A Military Air Transport Case used this way is never mixed with the other four types, and is emptied and re-tested before a change of role.

Conclusion

The application decides the configuration, and the configuration exposes the application. Spares rotation buys latch life, field repair buys opening speed, instruments buy a mount frequency, cold chain buys hold time, segregation buys compartments and dissipation. Match the scene first and the Military Air Transport Case stops being decoration.

This article discusses only the container (case body) side of specifications and design intent, and does not cover any handling, loading or use of the contents.