- Does the Roswell Flyer use stepper motors are simple DC motors ?
No it uses cheap mabuchi motor, but each of them is "drinking" 2-3A, multiply by 4 and you understand that with 900mAh, you can only fly 4 min...
- Do the electronics contain a gyroscope to calculate level flight ?
not only one but in fact 3!
- Does it contain a CPU and software to calculate motor speeds ?
it contains a micro controller with no reference and a close loop (maybe more than one)
- Do all 4 motors have adjustable speed, and is this done by changing the voltage ?
Yes with a PWM (pulse wide modulation), though 4 Transistors.
- Do you know of any websites where people build their own roswell flyer, including description of the electronics ?
Yes richards friedrich with a basic stamp, but i ve heard nothing since 3 years, a german guy hardwire one with 3 mixer and no gyro (i do not know how it fly), a french guy made a glow one and take months to make it fly. mike Dammar develop the draganflyer during 5 years. Nasa is building one for MARS, but the price of project is in million dollars. We try to build one, controlling motor is not the difficult part since some circuit are also available, reading gyro and determining what to do is more difficult (our site is http://www.ifrance.com/Phobos-flyer/). All links are on my homepage
- Aren&39;t the batteries very heavy, or are they an expensive kind ?
The weight comes from the battery. The problem of this heli is power consumption otherwise it is really great to fly. Hope to see the next generation of battery (methanol or something else). That will certainly push sales. Right now Nicad or nimh do notimprovemuch flight time. Li-Ion are still too expensive $80 or more.
- What makes the kit so expensive, the chips, the motors?
Nothing except the fact that no enough items are made, hand made is the real name of current production. In fact Mike says that all heli share the same prize (picollo or hornet). He refuse to develop a glow version because there is no market and nobody will pay for it. Moreover he has a recorded video where in less than a frame (1/24s) the heli get upside down because a motor died: no pilot on earth can save the situation.. and the heli in such case.
- Can propellors be build by cutting them from plastic.
The key of success is the quantities of air you can move to increase accuracy of controlling...you can discuss with the builder of the roswell flyer, he is open, his name is mike Dammar his site is at www.spectrolutions.com
- Do you know of webreferences to instructions to make them ?
no you must build them. Mario who build Micro heli and sell nice engineered upgrades parts send me a message, here is a copy:
Objet: Re: heli blades
DateÂ : Donnerstag, 7. Juni 2001 20:35
The Roswell blades are very easy to make, we are sorry but we don&39;t carry
blades for such. If you wan to make yourself a set, form wet sheet 1/16"
thick balsa over a 3 inch tube, hold it in place with rubber bands. When
dried you will have a balsa tube that you can sand and cover with epoxy and
carbon cloth, when finished cut to match Roswell blade pattern, sand the
leading trailing edges lightly and drill to match holes on the original
Hope this helps.
You may be interested in our current products which include micro RC
helicopters, systems and accessories.
- Would it be an idea to put 2 props above eachother to create a simple indoor heli. This would eliminate the need for leveling the helicopter
Yes but the mechanics is very complex, it is call a contra rotor, but you need 2 swashplate and the controller is difficult ti implement (mechanical mixer to modify pitch). Moreover no real application except some russian heli.
Questions/ Answer on Roswell Flyer, Draganflyer...
This tricopter/ tri-rotor is a hobby project. Three MEMS gyroscopes and a two axis MEMS accelerometer are used as sensors. It performs very well in aerobatics ("acro mode"), but it can also hover on its own ("hover mode"). This time with the full PLANS to do it yourself (you need to be able to build it through) All content is published under CC Attribution-Noncommercial-Share Alike 3.0 Germany Video in action Tricopter - Flips and a little bit of gardening from …
3345 Days ago
<><><>X-UFO R/C SpaceshipA cheaper (200euro) alternative to the draganflyer (800euro)Measures 49 x 49 x 7cm (l x w x d). UFO uses 1 x 12V batteryAvailable at www.boysstuff.co.uk, in this page HEREI even found found a video (wmv 6.54Mb bad quality) …
5221 Days ago
bonjour!j'habite en nouvelle caledonie, dans le pacifique sud, j'ai achete un "cerveau central " de draganflyer sans rien autour (excepte des rotors en piteux etat ),et ai envie bien sur de monter le bidule.....(un vieux reve) avant d'aller plus loin, je pilote des avions rc depuis 22 ans maintenant, et des helis depuis 10 ans( concept 46 vr full zeal et vigor cs avec un ys 80)...........je ne suis donc pas un total debutant.....En fait le draganflyer est vraiment très …
5241 Days ago
Mike Dammar has one more time done it! the greatest innovation for new comers and pilot enthousiast: The Draganflyer V Ti R/C Helicopter is a 3 heading lock gyro stabilized helicopter now with 7 electronic sensors to detect the horizon and assist the pilot if he get stressed to much. An optional Eyecam Wireless Video System, is also available in a package at $999.95 (780â?¬). Trust me it is one of the best aircraft design of the last 20 years. …
5338 Days ago
Tired of only being able to fly 3-4 min with your Draganflyer baby? the new generation of battery: Litium Polymer or LiPo has just been created for that purpose: extending flying time because of an unseeen yet capacity to weight ratio. You can now expect on an average 15 minutes of cordless and pure flying fun. …
5436 Days ago
Build your own roswell:www.ifrance.com/Phobos-flyer We planned to build our own roswell, using regular component. Buy a roswell flyer:http://ourworld.compuserve.com/homepages/larry_flewelling/index.htm Larry is selling the roswell at a very good price : 350$ !!!! Links: http://www.nyblimp.com/roswell/benton.htm Benton modify the frame too. http://www.nyblimp.com/roswell/mount.htm Roland modify the frame too. http://www.nyblimp.com/roswell.htm Some links what others people do to change the frame. http://www.seas.upenn.edu:8080/~erdinc/octarotor.html Interesting links with different project (commercial, military, university) some lines about an octarotor saucer.... Autopilot: Do it yourself UAV open source project Autonomous flight …
5469 Days ago
nullMike Dammar www.spectrolutions.com ou son distributeur www.draganfly.com (Canada) ou Mike Johnson http://www1.minn.net/~mjohnson/ (USA) Â …
5469 Days ago
Roswell Flyer Manual The following instructions are meant to guide you through the use and assembly of the alien technology known as the Roswell Flyer. Your attention to detail and safety precautions is mandatory. As we can not be there to help and guide you, these instructions must bridge that gap from what sits in front of you, a box of parts, and the final product, - radio controlled, silicon based flying device. Neatness and accuracy count. You can build …
5469 Days ago
Description Les hélices sont Ã pas fixes comme sur un avion, plus elles tournent vite et plus la portance crée est importante.le Draganflyer possède 4 moteurs indépendants -> il y a 4 contrÃ´leurs de vitesse qui fonctionnent sur le principe de variation de la valeur de tension continue (PWM: pulse wide modulation). L'interface de puissance est réalisé au moyen des 4 transistors indépendants.le Draganflyer possède 3 asservisements: lacets, roulis et tangage -> il y a 3 gyroscopes piézo-électrique de marque …
5469 Days ago
nullCosts Can be bought at www.draganfly.com for 80â¬ + shipping costs. Overall view The original frame is weak in many places and was designed more for indoor flying. A lot of people work on the Roswell Flyer and they all designed their own frame using carbon pipes. I decided to buy the carbon upgrade frame. As usual, all models: Roswell Flyer (sold out), HMX4 (copy of previous), Dragnaflyer are sharing the same design and are fully compatible. They were all …
5469 Days ago