Don’t get on a Sukhoi Su-27 without wearing this: Russian (and China’s Air Force) long-range underwear

Russian "Piddle Pack" for long-range flights in Su-27 Flanker.

Long-range flights can be extremely critical for combat pilots.

What makes long-range missions particularly uncomfortable is not only the complexity of the navigation but the lack of restrooms.

The use of urine collection devices called “piddle packs” in small cockpit compels the pilots to disrobe, adjust the ejection seat and distract them from handling the aircraft. A tricky procedure that can be extremely dangerous if lap belts get stuck on the control stick. As happened at least twice in the past causing the loss of two fighter planes (and the succesful ejection of the respective pilots).

Next generation “piddle packs” pump urine from a pilot’s underwear equipped with an inflatable cup and a hose to a sanitary collection bag so they don’t even have to unstrap when they have to go. A system that is particularly useful when wearing not only a flightsuit but also the anti-exposure suit designed for cold water survival.

A similar underwear system was produced in Russia for the Sukhoi Su-27 pilots and transferred to China along with the planes and a full set of pilot flight gear (including ZSH-7 helmets, helmet targeting device, flight suites etc.) when People Liberation Army Air Force (PLAAF) got the Russian Flankers before China started to manufacture its indigenous version of the plane (the Shenyang J-11A, that entered service in 1998).

The pictures (provided by a source who wishes to remain anonymous), show the Russian underwear delivered to the PLAAF. They should be self-explaining about how it is supposed to work (with the main difference being that the hose is connected to the plane and not to a bag), even if they give no hint of actual comfort…

Anyway, since the Chinese Air Force decided to use cheaper homemade flight gear (and long distance flights were seldom performed) this type of “piddle pack” has disappeared from PLAAF’s warehouse soon becoming a collectors’ item.

About David Cenciotti
David Cenciotti is a journalist based in Rome, Italy. He is the Founder and Editor of “The Aviationist”, one of the world’s most famous and read military aviation blogs. Since 1996, he has written for major worldwide magazines, including Air Forces Monthly, Combat Aircraft, and many others, covering aviation, defense, war, industry, intelligence, crime and cyberwar. He has reported from the U.S., Europe, Australia and Syria, and flown several combat planes with different air forces. He is a former 2nd Lt. of the Italian Air Force, a private pilot and a graduate in Computer Engineering. He has written five books and contributed to many more ones.


  1. I can keep buying the magazines I buy on military aviation… but on this blog I can feel so much really “inside” this world! I think this is as far as a civil pilot like me can go to know into this different world… :) Thank you for sharing all this “insider’s” news

  2. It has been a longstanding problem. Back in 1972, during the North Vietnamese “Easter Offensive” the USAF deployed a tactical fighter wing from New Mexico to Thailand. It was an epic accomplishment, moving 70+ F-4s across the Pacific in a matter of a couple of days. One famous incident on this deployment made the rounds — one of the wing’s weapon system operators (navigators) had a notoriously weak bladder. Upon landing in Guam (I believe) after the tanker-facilitated long haul from Hawaii, the crew chief saw him right after the canopy was raised, & the WSO was half-buried in small ziplock bags filled with golden liquid. Big smile on his face.

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