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Old Feb 17, 2011, 11:24 AM
8500 ft asl, 23% less lift
Joined Nov 2001
181 Posts
Discussion
Yet Another Demoiselle

Yes, I know, nothing new about a Demoiselle, except it took me some time to have it flying right.

Scale 1:24
Wingspan 23 cm
Length 25 cm
Weight Ready to Fly 13.5 gr with Bahoma Fullriver 90 mah
motor PZ Citabria
Radio Plantraco 3 ch. (Rudder, Elevator, Thr)

Some pictures of it and a couple of videos (courtesy of Nelo Tadeo).
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Last edited by LOV1; Feb 17, 2011 at 11:07 PM.
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Old Feb 17, 2011, 11:55 AM
8500 ft asl, 23% less lift
Joined Nov 2001
181 Posts
Videos

links to videos, first one with out lg to find out cg, second one with lg installed, spoked wheels are handmade, spokes are cotton thread.

demoiselle with out lg (2 min 54 sec)


demoiselle with landing gear (1 min 51 sec)
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Old Feb 17, 2011, 04:50 PM
Registered User
S.E. Michigan
Joined Feb 2006
844 Posts
Congratulations on a fine looking and great flying model! I would be interested in knowing more about houw you made the spoked wheels. They look really good.
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Old Feb 17, 2011, 05:28 PM
Team30 Micro EDF
NitroCharged's Avatar
Adelaide, Australia
Joined Apr 2004
11,196 Posts
She's a little beauty, Lovi. Well done.
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Old Feb 17, 2011, 05:31 PM
GymDandy Flyer
Ken Spencer's Avatar
Webb City, Missouri
Joined Apr 2004
592 Posts
Hi, LOV1

Ditto, Congratulations on a fine looking and great flying model!
A great accomplishment and you did it with actuators. I really, did not think they would have enough force to control an fully articulated tail.
Keep up the good work.

And Keep Them Flying ! Your friend, Ken
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Old Feb 17, 2011, 07:59 PM
TheyreComingToTakeMeAway!
derk's Avatar
USA, ID, Coeur D'Alene
Joined Dec 2003
5,455 Posts
very cool! my very first Demoiselle did not want to fly for me, but yours looks great!
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Old Feb 17, 2011, 10:37 PM
8500 ft asl, 23% less lift
Joined Nov 2001
181 Posts
Lost_Dawg I am attaching some more pics of the wheels, Hub is made of brass tube and brass discs soldered togheter, there are 9 holes on each side of the hubs, 36 on the rim. There is only one cotton thread for the whole wheel, Tire is made of "Foamy", a soft foam used for elementary school homeworks.

NitroCharged, kind of different speed envelope from those great DF jets of yours

Ken Spencer, rudder is really easy, the problem is with the elevator actuator, rudder is pull-pull. Elevator is pull for up, gravity for down, a big magnet for centering elevator helps on keeping it neutral but makes small movements for up. However, I fly it as a two channels most of the time, throttle and rudder, elevator is just used for final flare

Derk, First attemps did not work, I have a sig kit (haven´t build it yet) and used down and right thrust like the ones showed on sig plan. a complete failure, when fully powered demoiselle nosed down like a rock. Then I made 0 down 0 right, corrected dihedral angle and incidence and it flew like a dream.
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Last edited by LOV1; Feb 18, 2011 at 02:33 PM.
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Old Feb 17, 2011, 11:59 PM
Storm Runner guy
Slider2732's Avatar
USA, OK, Muskogee
Joined Nov 2008
3,581 Posts
Another very very nice model to grace that indoor arena.
1 cotton thread, that's an amazing piece of work for a wheel..and you had to do it twice !
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Old Feb 18, 2011, 06:42 AM
Registered User
Minneapolis, Minnesota
Joined Jul 2007
1,013 Posts
Wow. Those wheels are just mind-popping! Do you know what they weigh?

Jay
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Old Feb 18, 2011, 09:43 PM
8500 ft asl, 23% less lift
Joined Nov 2001
181 Posts
Faethor,

Wheels are 1.0 gr both
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Old Feb 19, 2011, 04:54 PM
Registered User
S.E. Michigan
Joined Feb 2006
844 Posts
Thanks for posting the pictures of your wheels! They must have been a bit of a project in themselves.
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Old Feb 21, 2011, 11:38 PM
Registered User
Nelo Tadeo's Avatar
México D.F.
Joined Aug 2006
609 Posts
LOV1:
Congratulations for the plane and weels...
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Old Feb 24, 2011, 11:33 PM
Moderador.
Alfredo Rubio's Avatar
guadalajara, jalisco, mexico
Joined Sep 2002
9,234 Posts
Hey mexican guys!!!!!!!! the way to go nice Demi, flies great, Lov1, did you used the Walt`s plans?

The wheels are amazing, I found some flying models old articles about the home made wheels and adviced silk thread.

Congratulations, excelente trabajo.

Al
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Old Feb 25, 2011, 01:11 AM
8500 ft asl, 23% less lift
Joined Nov 2001
181 Posts
Gracias Alfredo, Nelo

I will look for silk next time, Video is Nelo's courtesy, yes it is Walt's, but scaled down to 1:24, for this particular model, peanut scale is bigger (e.g. lower relation than 1:24, I am not sure but maybe 1:20 or something like that), mine has a 9 in ws against peanut's 13 in.

Nelo knows about this, something interesting is that she is flying at 7,600 ft. above sea level (Mexico City), lift is really affected at this scale (like 20% less lift at all scales), and so is thrust from propeller.

Regards
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