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- Path: sparky!uunet!usc!sdd.hp.com!wupost!waikato.ac.nz!canterbury.ac.nz!betelgeux!kaiser
- Newsgroups: rec.models.rc
- Subject: RE: Hobby Shack Birdie .40
- Message-ID: <1992Sep14.213509.820@csc.canterbury.ac.nz>
- From: kaiser@elec.canterbury.ac.nz (Chris Kaiser)
- Date: 14 Sep 92 21:35:08 +1200
- References: <$stevee.2.0@sasb.byu.edu> <190a6qINN4ha@usenet.INS.CWRU.Edu>
- Distribution: world
- Organization: Electrical Engineering, University of Canterbury, New Zealand
- Nntp-Posting-Host: elec.canterbury.ac.nz
- Lines: 53
-
- In article <190a6qINN4ha@usenet.INS.CWRU.Edu>, bs464@cleveland.Freenet.Edu (Duncan R. McCoy) writes:
- > Thanks, Steve. I flew me Birdie 40 for the first time this morning. It's
- > going to be a really fine airplane. Took 2 clicks of down and 2 clicks of
- > right trim for straight and level.
-
- Ah, the sign of someone who builds straight and true.
-
- > The plane is a very smooth flier, at
- > recommended aileron throws the roll rate is a bit slow, so I upped it.
- > You can't have a fast aileron rate and good snaps, though. The trick for
- > getting it both ways is to set your low rate at about 75% and use low
- > rate ailerons and high rate elevator for snaps.
-
- Actually the trick is to use a FF7 or similar computer set with a snap-roll
- switch - you just programme the required amount of elevator, rudder and aileron.
-
- What effect does too much aileron have on a snap roll? I've always just used
- full elevator, rudder and aileron with good results, although the model will also
- snap (just) on rudder and elevator only.
-
- > Solid knife edge requires
- > about 3/4" rudder throw. Inverted required only a little down elevator
- > that the plane flies as well inverted as upright. This plane seems to
- > do a slightly better outside snap than inside. It does really well with
- > an inside snap at the top of the loop. Haven't been able to do an
- > inverted flat spin yet. It tries to stay flat but drops out into an
- > axial spin. Oh well, a little more tinkering with the CG.
-
- So how do you get into (and then out of :-) a flat spin? Normal spins are no problem,
- although my model won't spin inverted at all - ends up in a slow spiral mush (not
- even worth calling a dive). I presume the first step is to move the CG back and then
- start by entering a normal spin, however what control inputs do you give to develop
- the spin into a flat spin?
-
- > Basically, this is a really good airplane. It flies well and there were
- > no surprises the first time out. The final config is with a Magnum Pro
- > .45, APC 10 X 7, and Futaba 6NFK radio.
- >
- > Recommended - a great $50 airplane.
-
- If this is the plane I'm thinking of, it's sort of a cross between an aerobatic
- slope soarer and a pattern ship - very clean design with long moment arms which
- should groove really well. However these models seem to me to be quite large for
- the engine size (I think the Birdie 10 is over 50" wingspan, I'm not sure about
- the Birdie 40), what is the vertical performance like?
-
-
- Chris Kaiser
-
- Postgrad, Elec. Eng. Dept.
- University of Canterbury
- Christchurch, NEW ZEALAND
-
-