MHefny
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  • Cairo, Cairo
  • Egypt
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MHefny's Discussions

Quadcopter Control-Function Layers

Started this discussion. Last reply by Anis Chihi May 22, 2013. 2 Replies

IntroductionQuadcopters is a very active topic, it is fun and easy to build, and make use of rich set of sensors for stabilizing and navigation. So if you like flying, mechanics and programming then…Continue

Tags: framework, control, quadcopter, hefnycopter

 

MHefny's Page

Latest Activity

MHefny replied to MHefny's discussion Changing Main frequency of HM-TRP 3DR Radio for Telemetry using AT Commands
"Based on replies the antenna circuitry will affect the range, but I guess for two adjacent frequencies it might work ok. you need to try and remember all firmware could be reversed back. "
Mar 11
Reuben replied to MHefny's discussion Changing Main frequency of HM-TRP 3DR Radio for Telemetry using AT Commands
"Anybody got any updates to this post .. i wanted to take a RFM23B  433 to 466?"
Mar 10
MHefny replied to Nelson Hom's discussion I want to send fpv live feed video to phones.
"Please try https://play.google.com/store/apps/details?id=rcmobile.FPV it sends low rate video stream over 3G/4G and much more other features. "
Nov 1, 2015
Mark commented on MHefny's blog post To Tricopter or to Quadcopter ..... That is the Question
"Hi Gary,  Apologies, I missed the point re non mechanical mech tilt. BTW, the aerodynamics of arms are less of an issue with the newer quads as the arms are around 14mm wide but thicker.  They would be even less but for the escs being…"
Oct 28, 2015
John Rambo commented on MHefny's blog post To Tricopter or to Quadcopter ..... That is the Question
"So personal observations: - In bright daylight TRIs give much better orientation feel (completely Agree to Jonh) - If servo is not undersized (thus increasing its realiability), less ESC/Motor count results in higher reliability for TRIs - More…"
Oct 28, 2015
Gary McCray commented on MHefny's blog post To Tricopter or to Quadcopter ..... That is the Question
"Just to clarify I wasn't talking about active motor tilting. There actually are a few quads that have active motor tilting, but I don't think the gains are worth the extra mechanical complexity and weight, although at least one example…"
Oct 27, 2015
Mark commented on MHefny's blog post To Tricopter or to Quadcopter ..... That is the Question
"Hi Guys, Our experience is mostly with designing/building/selling racing quads although we are developing a mini tri at present because they are cool and fun! Thought I would make some observations: a) the popularity of mini tri frames has fallen in…"
Oct 27, 2015

Developer
John Arne Birkeland commented on MHefny's blog post To Tricopter or to Quadcopter ..... That is the Question
"Tricopters tend to be a favorite if the pilot has previous experience flying helicopters since the feel is similar. Another plus for tri is that it's easier to keep visual orientation. But other then that, quad wins in most areas."
Oct 27, 2015

Developer
leonardthall commented on MHefny's blog post To Tricopter or to Quadcopter ..... That is the Question
"Hi MHefny, If you tilt the front two motors forward you will get a good low drag profile. You will need to adjust your pid gains to ensure the roll authority doesn't drop and the copter becomes unstable. You could probably go to 60 degrees…"
Oct 27, 2015
Andrew Zaborowski commented on MHefny's blog post To Tricopter or to Quadcopter ..... That is the Question
"Gary, I haven't used digital servos yet.  In my experience the servo's power draw is minimal.  The reason I mentioned micro quads is that you generally have smaller batteries on them, and there, and additional 100mAh might be an…"
Oct 27, 2015
MHefny commented on MHefny's blog post To Tricopter or to Quadcopter ..... That is the Question
"Gray I liked the idea of tilting the board, either physically or in firmware. Leonard, Thanks alot man.... alot of info here I didnt know. What I try to suggest here is that tilted Tricopter with adapted firmware to Keep the frame horizontal…"
Oct 27, 2015
MHefny commented on MHefny's blog post To Tricopter or to Quadcopter ..... That is the Question
"Gray  Thanks for the feedback .... really useful to me. I guess building H frame quad with tilted motor will be more like this . There will be no issue between Roll and Yaw. The point that I wanted to highlight in TriCopter is that…"
Oct 26, 2015

Admin
Gary Mortimer commented on MHefny's blog post To Tricopter or to Quadcopter ..... That is the Question
"I have to put my hand up as a tricopter fan! It might not be for very valid technical reasons but they just feel nicer to fly."
Oct 26, 2015
Gary McCray commented on MHefny's blog post To Tricopter or to Quadcopter ..... That is the Question
"Hi Leonard, I do think it is important to note that the only reason tricopters with the same total swept prop area as an equivalent quad are more efficient is because of the larger prop diameter in the 3 propellers of the  tricopter to acheive…"
Oct 26, 2015
Marcus Wright commented on MHefny's blog post To Tricopter or to Quadcopter ..... That is the Question
"I have been flying a tricopter with Arducopter for about 4 years doing mapping and have had no tuning problems. Tricopters seem to be easier to keep orientation for some reason.  I agree on the efficiency, with 2D flat map gimbal and canon…"
Oct 26, 2015

Developer
leonardthall commented on MHefny's blog post To Tricopter or to Quadcopter ..... That is the Question
"Hi All, There is a lot of information here, some correct, some incorrect. Tri-copters are more efficient for the same prop area unless the designer is doing something silly. Tri-copters provide good yaw performance ONLY if the CG of the rear motor…"
Oct 26, 2015

Profile Information

About Me:
I am a computer Engineer, works in software field. However as a hobby I am interested in hardware and autonomous vehicles.
Please tell us a bit about your UAV interest
I am trying to build a UAV that can navigate in closed area.
Hometown:
Cairo, Egypt

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MHefny's Blog

To Tricopter or to Quadcopter ..... That is the Question

Posted on October 26, 2015 at 7:30am 18 Comments



Maybe you are one of those who googled for the difference between Quadcopter & Tricopter. For sure you found many feedback and comparisons. 

Mainly the difference will be regarding power consuming, or mechanical complexity. Some prefer Quadcopters for its simplicity to build and fix, others prefer TRICopter for its ability to YAW more…

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A Python Experiment in Gyro Calibration & Drift Cancelling

Posted on June 13, 2015 at 7:12pm 0 Comments

This article is to share my findings in gyro calibration. I tried to make a python script that uses data comes from mobile phone [S5 that has 6050 IMU]. It was a good chance to write simple code and visualize results much easier than doing so on Arduino with IMU 6050 attached. But still the concept…

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Andruav - Towards a Shared Data Model

Posted on June 5, 2015 at 7:26pm 8 Comments

It has been a while since my last article about Andruav.

Now Andruav has…

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Andruav SDK

Posted on March 19, 2015 at 7:00am 0 Comments

 

This is my fifth article about Andruav. The new thing about this topic is that it targets Developers more than users.

Andruav-SDK is a …

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