Rules from http://www.skybattle.org

Postal contest for
“Bagged Slip-Together Balsa Airplane Kits That Come With Wheels”
Which is a very long name!

​​Contest flight-window is April 26 to May 5, 2024 Arbor Day to Cinco De Mayo!
Postal Contest rules:
Model must be a bagged slip-together all-balsa rubber-powered model airplane that comes with wheels, free-flight rubber-powered.

Official flights must be made within the contest flight-window.
Unlimited flight attempts, your best single duration is your score.

Under 18 years of age compete in Junior/Senior class, over 18 flies in Open class.

All official flights must take off from the ground or a tabletop etc.

Models can fly in Stock class (with only added dihedral and upgraded motor allowed) or Modified class (which allows airframe changes but with only the wood in the kit). Any size rubber motor is allowed.

Report flight duration (score), pilot age, model class (Stock or Modified) at SkyBattlePostal@gmail.com

Regular Guillow’s Strato Streak and Jetstream models are eligible, along with many others like the Sleek Streek (original or repro from https://volareproducts.com/blog/?product=sleek-streek-full-kit) or Testors models or any other product you can find which meets the rules.
Each pilot may make unlimited attempts to get his or her single longest flight time.

Use a stopwatch or smartphone timer app.
Timing starts at model launch and stops when the model touches the ground, goes out of sight during flight, or lands on any structure, tree, etc

Each pilot may enter one or both classes.

No entry fee.