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  • Bobcat

    From Angus McLeod@VERT/ANJO to Digital Man on Tue Sep 1 19:00:00 2009
    I've had two short, very hectic and nerve-wracking flights with this
    thing:

    http://www.anjo.com/rc/aircraft/bobcat50/bobcat50.rtf-01.jpg

    Almost uncontrollable. A true nightmare to fly. I suspect it needs some
    work on the Center of Gravity which was set as recommended but seems to be
    too far aft. An aftward CoG can cause a plane to behave *exactly* the way this one is behaving. Hopefully, shifting the CoG forward will make turn
    her into a good flier. Only one not-too-good photo of her in the air:

    http://www.anjo.com/rc/aircraft/bobcat50/bobcat50.firstflight.jpg

    and with the gear down, too. The trouble is, if you want pictures of a
    model that YOU are flying, you have to get some OTHER idiot to operate the camera! Then godnozewot sort of pictures you'll get.....


    ---
    ■ Synchronet ■ The ANJO BBS: Made of wood and glue, but mostly glue!
  • From Digital Man@VERT to Angus McLeod on Tue Sep 1 17:29:42 2009
    Re: Bobcat
    By: Angus McLeod to Digital Man on Tue Sep 01 2009 07:00 pm

    I've had two short, very hectic and nerve-wracking flights with this thing:

    http://www.anjo.com/rc/aircraft/bobcat50/bobcat50.rtf-01.jpg

    Look nice on the ground anyway. :-)

    Almost uncontrollable. A true nightmare to fly. I suspect it needs some work on the Center of Gravity which was set as recommended but seems to be too far aft. An aftward CoG can cause a plane to behave *exactly* the way this one is behaving. Hopefully, shifting the CoG forward will make turn her into a good flier. Only one not-too-good photo of her in the air:

    http://www.anjo.com/rc/aircraft/bobcat50/bobcat50.firstflight.jpg

    and with the gear down, too.

    Is it retractable?

    The trouble is, if you want pictures of a
    model that YOU are flying, you have to get some OTHER idiot to operate the camera! Then godnozewot sort of pictures you'll get.....

    Yeah, but at least they're not likely to smash your camera into the ground into a million little bits.

    digital man

    Snapple "Real Fact" #38:
    Fish cough...

    ---
    ■ Synchronet ■ Vertrauen ■ Home of Synchronet ■ telnet://vert.synchro.net
  • From Angus McLeod@VERT/ANJO to Digital Man on Thu Sep 3 19:07:00 2009
    Re: Bobcat
    By: Digital Man to Angus McLeod on Tue Sep 01 2009 17:29:00

    http://www.anjo.com/rc/aircraft/bobcat50/bobcat50.rtf-01.jpg

    Look nice on the ground anyway. :-)

    Yep! Purty!! :-)

    Only one not-too-good photo of her in the air:

    http://www.anjo.com/rc/aircraft/bobcat50/bobcat50.firstflight.jpg

    and with the gear down, too.

    Is it retractable?

    Yes. It carries a compressed air cylinder at 100 PSI (shown here above
    the fuel tank):

    http://www.anjo.com/rc/aircraft/bobcat50/bobcat50.tanks.jpg

    which is switched via a valve (shown here in green -- bottom left):

    http://www.anjo.com/rc/aircraft/bobcat50/bobcat50.brackets.jpg

    which actuates a pneumatic cylinder that pulls the gear up.

    http://www.anjo.com/rc/aircraft/bobcat50/bobcat50.noseleg-up.jpg

    A clever linkage allows the nosewheel to steer when down, but not to foul
    and jam when the gear is pulled up. Main gear is operated very similar, except the wheels come up into the bottom of the wing, and there is no steering linkage to worry about.

    This is an Air-up/Spring-down system. When you operate the valve to
    release the pressure, springs cause the undercarriage to come down again,
    and lock. This is more fail-safe than an Air-up/Air-down system which can leave you with your gear stuck in the UP position if your system develops
    a leak during the flight.


    ---
    ■ Synchronet ■ The ANJO BBS: Made of wood and glue, but mostly glue!
  • From Digital Man@VERT to Angus McLeod on Thu Sep 3 17:38:59 2009
    Re: Bobcat
    By: Angus McLeod to Digital Man on Thu Sep 03 2009 07:07 pm

    Re: Bobcat
    By: Digital Man to Angus McLeod on Tue Sep 01 2009 17:29:00

    http://www.anjo.com/rc/aircraft/bobcat50/bobcat50.rtf-01.jpg

    Look nice on the ground anyway. :-)

    Yep! Purty!! :-)

    Only one not-too-good photo of her in the air:


    http://www.anjo.com/rc/aircraft/bobcat50/bobcat50.firstflight.jpg

    and with the gear down, too.

    Is it retractable?

    Yes. It carries a compressed air cylinder at 100 PSI (shown here above
    the fuel tank):

    http://www.anjo.com/rc/aircraft/bobcat50/bobcat50.tanks.jpg

    which is switched via a valve (shown here in green -- bottom left):

    http://www.anjo.com/rc/aircraft/bobcat50/bobcat50.brackets.jpg

    which actuates a pneumatic cylinder that pulls the gear up.

    http://www.anjo.com/rc/aircraft/bobcat50/bobcat50.noseleg-up.jpg

    A clever linkage allows the nosewheel to steer when down, but not to foul and jam when the gear is pulled up. Main gear is operated very similar, except the wheels come up into the bottom of the wing, and there is no steering linkage to worry about.

    This is an Air-up/Spring-down system. When you operate the valve to
    release the pressure, springs cause the undercarriage to come down again, and lock. This is more fail-safe than an Air-up/Air-down system which can leave you with your gear stuck in the UP position if your system develops
    a leak during the flight.

    Very cool. And you built this plane? Looks much more intricate than a Zagi!!

    digital man

    Snapple "Real Fact" #98:
    When the moon is directly over you, you weigh less.

    ---
    ■ Synchronet ■ Vertrauen ■ Home of Synchronet ■ telnet://vert.synchro.net