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2007 F5J Overview PowerPoint PPT Presentation

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

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2007 f5j overview l.jpg

2007 F5J Overview

Seattle Area Soaring Society


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Topics

  • What is F5J?

  • Current activities

    • Worldwide

    • Northwest

  • Categories

    • Speed 400

    • Outrunner Class (“Albuquerque” Rules)

    • 7 Cell

    • Unlimited

  • Competitions


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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


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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


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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


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F5J Classes

  • Speed 400

  • Outrunner (“Albuquerque” Rules)

  • 7 cell (Limited Rules)

  • Unlimited


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F5J – Typical Speed 400 and Outrunner Planes


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F5J – “Out-of-the-Box” ideas for Speed 400 /Outrunner planes


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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


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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


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F5J – Outrunner Class

  • Inexpensive yet high performance setup:


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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


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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.


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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!)


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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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