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Old Jun 20, 2003, 07:35 AM
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L.I.A.'s Avatar
Long Island, NY
Joined Mar 2003
98 Posts
Why is the crazy max have 0% dihedral, but my slow stick does, and wont turn?

i just noticed...... I really am only familiar w/ gws planes, but while on ALLeRC.com, i noticed the "crazy max". It has a no dihedral wing. Why is this plane designed like this and able to turn correct;ly?


heres the previous post concerning this topic:


I built it perfectly (at least i hope i did).

The only mod i did was to leave very little dihedral. I cut a styrofoam piece and laid it into the center of the wing fold, and epoxied it together. I would say it has about 1/4 dihedral of what it should have if you just folded out as stock.

The problem i am having is that it is difficult to turn and maneuver. It will loop and dive very easily. but turning is almost impossible. it very odd.

Am i screwed? Did lessening the dihedral destroy the flying characteristics of this plane? I did it so it wold be a little MORE manuverable, when in fact, it is the opposite.

it has a stock 300 w/ 1260, 2s2p etec 700 lipolys and naro servos. What gives? My other one flies great (just really beat-up)
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Old Jun 20, 2003, 07:50 AM
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jimsp's Avatar
Sayre,PA
Joined Sep 2002
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The Crazy Max has ailerons.
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Old Jun 20, 2003, 07:52 AM
Space Coast USA
hoppy's Avatar
Space Coast
Joined Oct 2000
21,158 Posts
Planes with ailerons, like the crazy max, don't need dihedral to turn. Planes without ailerons need at least 5 deg dihedral to turn. Cut the wing in half and put the dihedral back in.
hoppy
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Old Jun 20, 2003, 07:54 AM
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MattLarson29's Avatar
United States, FL, Casselberry
Joined Jul 2002
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The Crazy Max has aileron control, so it does not need dihedral for stability.

Dihedral makes a wing 'want' to fly level - on a rudder and elevator only airplane like the Slow Stick, the dihedral keeps the plane level since you cannot control the roll axis directly.

Matt
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Old Jun 20, 2003, 08:00 AM
an earth bound misfit, I
Basketcase's Avatar
St. Pete, Florida
Joined Sep 2001
9,429 Posts
The Crazy Max has ailerons. And a fully symmetrical wing.

The SlowStick is rudder/ elevator only and has undercambered wings.

A plane without ailerons will not turn effectively without dihedral. And a plane with ailerons won't turn correctly with dihedral.

(edited to add: not for all planes, there are exceptions such as low wing planes, a lot of which have dihedral and ailerons.)

Also ailerons do not work very well with undercambered wings.

You best bet is to cut the foam piece you installed out and put the dihedral back in, or cut the wings out near the tips and add some polyhedral. Which just means two bends in the wing.

http://www.rcgroups.com/forums/showt...ght=polyhedral

http://www.rcgroups.com/forums/showt...ght=polyhedral
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Last edited by Basketcase; Jun 20, 2003 at 08:40 PM.
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Old Jun 20, 2003, 10:32 AM
Forgot how to fly
Mike Parsons's Avatar
Atlanta, Georgia
Joined Oct 2002
10,200 Posts
Yep, Ailerons, and it wouldnt be very acrobatic with Dehidral. Fun Plan (since retired)...just wish it wasnt so darn ugly.


Mike.
www.atlantaeflyers.com
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Old Jun 20, 2003, 11:28 AM
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Novato, CA USA
Joined Jan 2002
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And just WHO are you calling UGLY ????

C. Max

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Old Jun 20, 2003, 11:35 AM
Been There! Done That!
boomerace's Avatar
Eugene, Oregon, United States
Joined Sep 2001
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Quote:
Originally posted by sheerLuck
And just WHO are you calling UGLY ????

C. Max

THAT is way beyond ugly!!!!
boomer
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Old Jun 20, 2003, 11:56 AM
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Newton, NJ
Joined May 2003
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what the heck is that spinner, anyway? Homebrew, or 2-pc. missing the cap? I like the cowling, though.
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Old Jun 20, 2003, 12:13 PM
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Novato, CA USA
Joined Jan 2002
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http://www.hobbypeople.net/gallery/145310.asp missing the cap. I think it's stuck in the mud in some deep grass over in the park. Cowling is standard Edge shaving cream cap, first modded by Basketcase, I think.

Larry
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Old Jun 20, 2003, 01:10 PM
Forgot how to fly
Mike Parsons's Avatar
Atlanta, Georgia
Joined Oct 2002
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Quote:
Originally posted by sheerLuck
And just WHO are you calling UGLY ????

C. Max

Well color me corrected.....that is so ugly it's cute
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Old Jun 20, 2003, 06:13 PM
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L.I.A.'s Avatar
Long Island, NY
Joined Mar 2003
98 Posts
so......should i get a crazy max?
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Old Jun 20, 2003, 06:19 PM
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Novato, CA USA
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Yes.
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Old Jun 20, 2003, 06:20 PM
Been There! Done That!
boomerace's Avatar
Eugene, Oregon, United States
Joined Sep 2001
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Quote:
Originally posted by L.I.A.
so......should i get a crazy max?
A aileron trainer it's NOT! If you have flown ailerons before fine but if not your first flight will require addition of epoxy after the crash!
boomer
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Old Jun 20, 2003, 08:46 PM
an earth bound misfit, I
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St. Pete, Florida
Joined Sep 2001
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LIA, I agree with Boomer, the CrazyMax is only good for an aileron trainer if you're VERY comfortable with the SlowStik.

Another choice that's sort of in between is the GWS E-Starter.


Hi Larry, thanks for remembering.

BC
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