UIM · hydrofly

UIM Hydro-Fly

UIM 2026, 900. The rulebook does not state a governing principle for this class.

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Read out of the published UIM rulebook on 2026-09-08, so confirm anything that decides a purchase. The full note is at the foot of the page.

No component rules are published for this class. The rulebook recognises it and gives it no technical rules of its own, and names no single class for it to inherit from. Nothing here can be answered for it, and an empty list would read as no restriction rather than as no answer.

Running the class

Licence or tier

A valid international hydro-fly licence from the rider's National Authority, plus proof of insurance.

Read from the same class section as the part answers. The rider side of the sport, tiers, ages, licences and what gets inspected, is set out across the bodies at Racing.

Open questions on this class (3)

Places where the rulebook contradicts itself, or where a figure could not be settled. Nothing in this list is decided, and it sits here rather than in a footnote because it is what you would want before spending money.

• The champion pages at the front of the rulebook name only Hydrofly Pro Men and Hydrofly Pro Women, and the 302.01 table has no Hydrofly row, while 900.05 defines four categories. "Pro" in 900.05 is presumably the men's class but is not labelled by gender.
• The Junior category is 17 or under while Pro is 17 or over, so 17-year-olds appear in both.
• No minimum weight or sound limit is given for Hydro-Fly.

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UIM 2026, 900, read from the rulebook on 2026-09-08. Read the rule yourself, UIM Hydro-Fly. Every UIM class · where the rulebooks differ · how this site reads a rulebook.

Cite this page

“UIM Hydro-Fly, UIM class rules”, BaddJet archive, https://baddjetarchive.com/legality/uim/hydrofly/

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