2007 f5j overview
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2007 F5J Overview Seattle Area Soaring Society Topics What is F5J? Current activities Worldwide Northwest Categories Speed 400 Outrunner Class (“Albuquerque” Rules) 7 Cell Unlimited Competitions What is F5J? Broad category for thermal duration, electric powered sailplanes

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2007 f5j overview

2007 F5J Overview

Seattle Area Soaring Society

topics
Topics
  • What is F5J?
  • Current activities
    • Worldwide
    • Northwest
  • Categories
    • Speed 400
    • Outrunner Class (“Albuquerque” Rules)
    • 7 Cell
    • Unlimited
  • Competitions
what is f5j
What is F5J?
  • Broad category for thermal duration, electric powered sailplanes
  • Not yet an official FAI category
  • Different classes range from simple, inexpensive setups to state-of-the-art very high performance planes
  • Competitions are great fun and much simpler to run than Thermal Duration
    • No winches
    • Man-on-man is easy to coordinate
f5j evolution
F5J Evolution
  • New technologies in electric RC are benefiting F5J
    • Brushless motors
    • Lipoly cells
  • Benefits
    • Lighter e.g. equivalent outrunner class plane is 5oz lighter than a speed 400 plane
    • Much simpler maintenance
    • More accessible for beginners
    • No more expensive than older setups
f5j activities
F5J Activities
  • Still relatively casual in the US
  • “Big” Competitions
    • Nats
    • Alberquerue F5J WC
  • Internet
    • x5J on RCGroups
  • Local
    • SASS 2007 F5J Season
    • SRAC Duration Contests
f5j classes
F5J Classes
  • Speed 400
  • Outrunner (“Albuquerque” Rules)
  • 7 cell (Limited Rules)
  • Unlimited
f5j speed 400
F5J – Speed 400
  • Original inexpensive setup and still popular today
    • However, Outrunner class is rapidly taking over
    • In one big contest last year, Outrunner entrants outnumbered Speed 400 2.5:1 even though Outrunner had only been introduced the year before
  • Speed 400 can motor
    • Gearbox allowed
  • 7 or 8 cell Nicad or Nimh cells
f5j outrunner class
F5J – Outrunner Class
  • Goal of this design was a 50% better climb rate using simpler, more efficient technology that is no more expensive
  • Same planes as Speed 400
  • Inexpensive setup
    • Simple brushless outrunner motor with long life (many seasons)
      • 28mm diameter and 16mm length
      • Hacker A20-20L is by far the most popular at the moment
      • EFlight xxx is also a good choice (Galaxy has these)
    • No gearbox
    • Lipo batteries
      • 2s (2 cells in series) pack limit
      • Twice the capacity of typical Speed 400 packs
      • No need to recharge to optimize performance
    • Overall setup is ~5 oz lighter than a Speed 400
f5j outrunner class11
F5J – Outrunner Class
  • Inexpensive yet high performance setup:
f5j 7 cell
F5J – 7 Cell
  • Sometimes being referred to as “Limited”
  • MANY competitions now allowing either 7 Nicads/NiMh or 2 Lipol Cells
  • No airframe limitations so a wide range of planes can compete effectively. Most common is large floaters e.g. AVAe
f5j unlimited
F5J Unlimited
  • The ultimate in airframe and power plant technology. No limits on airframe or power plant! Arc welders with wings …
  • Top contenders draw >>100 Amps and climb vertically and almost a mile/minute
  • Typical planes are e-converted unlimited winch-launch planes such as Pikes, Graphites, etc.
f5j competition format
F5J Competition Format
  • Very similar to winch-launched competitions
  • Man-on-Man makes this a lot of fun
  • Launch phase
    • Fixed or pilot-determined motor run time
    • Pilot-determined makes for more exciting competition
  • Duration Task
    • 5, 7, 10 minutes just like TD
  • Landing Task
    • Land at 10:00 for example on the spot
    • Just like TD (except everyone is landing at the same time!)
f5j summary
F5J Summary
  • Rapidly growing new category with emphasis on fun
    • Very accessible to first-time competition/F5J pilots
  • Highly competitive planes not much more expensive than winch-launched sailplanes
  • SASS ‘07 F5J Season will be a blast
  • Get your planes ready!!
  • Dave and Trevor are ready to help
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