صناعة هيلوكابتر منزليةمن الألومنيومالمواصفات
2x # hexTronik 24gram Brushless Outrunner HXM2730-1300/2069 1300kv = $ 15.98
2x TURNIGY Plush 12amp # TR_P12A-E/2161 (2A BEC) BESC = $ 19.56
2x # TR- V -tail / 6321 TURNIGY V -Tail Mixer. Ultra -Small = $ 5.90
3x # HK401B/10113 Hobby King 401B AVCS Digital Head Lock Gyro = $ 35.97
1x Turnigy 2200mAh 3S T2200.3S.20/8932 # 20C Lipo Pack = $ 8.49
1x # 00 ORNG8F/143 Futaba FASST Compatible 8Ch OrangeRx 2.4Ghz Receiver = $ 29.99
1x # GWPRO002S3D/5247 GWS HD8040 3 Blade Prop (2pc pack) = $ 2.69
1x # GWPRR002S3D/5249 GWS HD8040 3 Blade Prop Counter Rotate (2pc ) = $ 2.69
# BU14A707-06/9648 2x Turnigy Pure -Silicone Wire 14AWG ( 1mtr - 69A ) BLUE = $ 2.58
# 1x 20CM Servo Lead AM2001-20x10/9706 ( Futaba ) 32AWG Ultra Light ( 10pcs/set ) = $ 1.89
2x # ST-FOAM-DB/8999 Peel -n -stick foam tape . 10x5inch 4mm thick = $ 2.78
1x # HK5024/9535 HK- T500 Skid Landing = $ 3.59
As you can see I'm using a skid landing a 500 size heli and aunq fits a little big has more stability on landing ...
The structure and see in pictures, but basically I bought a square aluminum tube 2 inches square and 1 mm thick sheet . I will also use an L 1 cm aluminum plate and 2 cm wide and 2 mm thick.
I have seen on the internet there is only one company , Canadian, who sells appliances like this. Gress called Aeronautichttp://www.gressaero.com/
I think just name them for having anime watching his videos.
I almost made a shopping list on hobby king and I'll get anything with structure. I've never done anything for myself pro built model airplanes and story with a dremel and some more, but I think imaginatively 'll go ahead !
The idea of this post is not only to show my progress to anime or who is interested in the subject, but also that opinéis and bear your ideas on many things that I stumble insurance .
To start my first big question has been the stabilization system and mixing. Not much information about so giving head I'm designing my own behalf .
Basically the bottom line is that these devices are uncontrollable to be piloted "by hand" , so stabilization is essential in 3 axes with 3 gyroscopes . Surely the use of altimeters , accelerometers and other , as is done in many " quadricopteros " would help , but I think that if a caddisfly stable fly without them he will too !
Once the command has stabilized in roll, pitch and yaw gyros orthogonally with 3 posts mixtures requires multiple channels to manage the two servos and two engines of the drone count . The following image shows a summary
I saw no other way out than using arduino programmable electronic type which , although I'm documentandome To this mixture. I'm pretty fish. Most likely I 'll end up using it but the other day with the pillow had a bright idea : Why not use a mixing of 'tails in V "," flaperone "so" elevons " as used in many aircraft not disponenen a station with these settings ? ? I think it would work because as seen in the picture basically have to " add / subtract " signs of gas and roll (after gyro , light ) , leaving the ESCs of the two engines , and the pitch and yaw (after the gyro too) with access to the two servos acting on the inclination of each motor.
I'd like dijeseis those who understand what I intend to do, if you see viable or not , I have never used this type of mixer and do not know what problems I find . Something I read about that sometimes gyros put a small delay in the signal do not work to be confused with the one that comes without gyro , for example. In any case I've seen these that cost four dollars and says any comments powered gyros , but I fear that the biggest problem is the reaction rate , that need very high and these devices may be limiting me . But will test for its price !http://www.hobbycity.com/hobbycity/s...idProduct=6321
Some are more expensive and probably better, but problems are discussed gyros ....
Well, I do not want to scare you more . For now it's enough ...
I hope your opinions , do not cortéis !
well, while I finish defining the structural part and I hope to buy some things that I 'm giving more little details are in stock :
Interestingly I noticed that the pivot axis about which engine you are inclined 45 ° to the axis logical that anyone we could think ...
Why do this? Well , see if I can explain it :
This artifact , or whatever you want to call it, draws much of its stability in the inertia contrarotatorias give her two propellers. Yes, it sounds weird you can check if poneis to turn something ( a press bike taking her towards his shaft with one hand on each side, pro example) , if you try to change the orientation of 'll notice axis that costs do , the greater the inertia ( mass of the object ) and the rotation speed of this high cost . Which translates to wind stability , controllability and so on.
Well, this I have actually said that in addition to providing stability results in another effect I call " gyroscopic moment." Really understood physics purists will refer to precession and nutation time but I do not think it worth the physics lesson in a forum aeromodelling ...
What is this effect? Very simple. Looking at the picture I put below you can see how to a yellow mass rotating at angular velocity " w " ( apologies that I can not type Greek letters ... ) , if you change the position by turning a magnitude ' Y' " this mass reacts by generating an angular momentum " My " as shown in the figure , which in this case will lay my head down bicóptero to the nose and lifting the tail or vice versa to suit the driver at the same instant that our servo do tilt the axis of rotation of the motors , and therefore of the propellers.
Although it is complex to understand is the basis of control of this unit and wanted to explain it at least once .
Because the engines are inclined at 45 ° to its longitudinal axis, instead of moving them forward or backward one will also have a component that will slide in or out . Causing the effect described in the picture. For example , if I move my servos move both motors forward and out. The forward movement will not generate any " gyroscopic moment " for being nullified the effect of an engine with the other, while the two engines when opened will make a combined effect of causing a moment or force that tends to tilt towards bicóptero front , which is what interests us . If the effect is the desired one is as simple as changing the propeller and make the motors turn in the opposite direction ( change any two of the 3 wires carrying a brushless motor).
To back would be the same, only the engines are tilted inward and backward.
To control yaw gyroscopic effect also helps I think , although the primary will be the forces of thrust of the propellers .. But in this case the engines make opposite movements .
Well, for now I think I've already introduced good, now plays catch pit ! The page http://www.gressaero.com/
can watch videos of bicópteros they sell.يتبـــــــع