Title: mathematical background of quadrotor Post by: avigyan.chatterjee on June 14, 2014, 12:25:48 PM I am going to make a quadrotor. For that purpose I have searched internet a lot. My budget is about 8000-10000 and I want to make small quadrotor about 330-450mm size. I have found that in various websites there are different rate of different parts.
Shop Parts Quantity Price Total RcDhmaka Emax2822 BLDC 4 595 2380 RcDhmaka Hobbywing Skywalker 20A Brushless ESC 4 659 2636 RCBazaar KK MultiCopter V5.5 with programmer & distribution board 1 1,700 1,700 RCBazaar Quadcopter propellers 8 x 4.5 (black) 2 set 110 220 total 6936 I already have Lipo battery , HK tx-rx set, Velcro strip etc. I want to make the frame myself with aluminum rectangular sticks. But I cannot understand what is the relationship between prop size and all over weight and the dimension of the frame. Is there any mathematical formulation behind it. I think obviously it has. Though I have mentioned above about the motor, but I don’t know whether it is suitable for this purpose or not. If not plz suggest me. Title: Re: mathematical background of quadrotor Post by: chintal on June 14, 2014, 12:59:18 PM Please give me a call i can help you build your quad
7678013993 I even have arf kit for sale if interested Regards Chintal Rcmumbai.com Title: Re: mathematical background of quadrotor Post by: rcrcnitesh on June 14, 2014, 04:31:43 PM use 10" props not 8"
Title: Re: mathematical background of quadrotor Post by: Rc Mumbai.com on June 14, 2014, 11:32:35 PM while making a customized multirotor please keep in mind what is your auw weight and what is the maximum thrust produced by the motors (totalling all four if a quad)
the total thrust produced by the motors divided by 2 has to be your max auw that is a basic formula and if you are looking for greater flight time lower kv motors bigger props while keeping the g/win mind should be above 11 then get a decent flight time it again depends on how good the frame/balanced props/material used /motors/esc/batt mah to weight to ratio is the output that you will get is a fast and powerful multirotor(depends on flight control board used and its pid settings ) where motors dont get hot (warm is ok ) and a decent flight time of 15 to 20 mins..... hope this will help Happy Flying Regards Chintal Rcmumbai.com Title: Re: mathematical background of quadrotor Post by: avigyan.chatterjee on June 14, 2014, 11:44:15 PM what is fcb and pid?
how can I measure the motor efficiency or is it supplied with the motor manual? Title: Re: mathematical background of quadrotor Post by: Rc Mumbai.com on June 14, 2014, 11:57:23 PM sorry for using shortcuts
fcb=flight control board pid= you can refer to this http://www.rcgroups.com/forums/showthread.php?t=1375728 (http://www.rcgroups.com/forums/showthread.php?t=1375728) Title: Re: mathematical background of quadrotor Post by: Rc Mumbai.com on June 15, 2014, 12:39:13 AM just an example of a good quality motor's thrust chart
Title: Re: mathematical background of quadrotor Post by: avigyan.chatterjee on June 15, 2014, 08:10:08 AM Many many thanks Chintal for your help. If I get any problem i'll contact with u. your website is not opening now. can get quad parts within my budget from u(8000-10000)?
with regards avigyan Title: Re: mathematical background of quadrotor Post by: chintal on June 15, 2014, 08:19:40 AM In the for sale section of forums i have put up all products with price
My site is under construction still Title: Re: Re: mathematical background of quadrotor Post by: arun.sreelakam on June 15, 2014, 08:59:11 AM Chintal which motor chart is that?
Can you please pm me the details? Is that of ldpower? With 15inch prop 960gms with 4amp is awesome:o I need some Title: Re: mathematical background of quadrotor Post by: satyagupta on June 15, 2014, 10:34:40 AM Arun bro thats for SunnySky 4112 320kv
http://www.aliexpress.com/store/product/SUNNYSKY-X4112S-320KV-Outrunner-Brushless-Motor-for-Multi-rotor-Aircraft-free-shipping/809715_714584899.html (http://www.aliexpress.com/store/product/SUNNYSKY-X4112S-320KV-Outrunner-Brushless-Motor-for-Multi-rotor-Aircraft-free-shipping/809715_714584899.html) Title: Re: mathematical background of quadrotor Post by: chintal on June 15, 2014, 11:02:13 AM You can pre order these motors
All sunnysky v series motors are if such quality Title: Re: Re: mathematical background of quadrotor Post by: arun.sreelakam on June 15, 2014, 12:41:00 PM My god that chart is not correct I have 6 of the same motor with 15 inch props running and with 6s
Never able to get those result.. May be hk amp meter having some problem.. :o>:( Title: Re: mathematical background of quadrotor Post by: chintal on June 15, 2014, 01:46:29 PM How is that possible ?
A fake chart ? |