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moglos's Discussions

Send analog data over telemetry

Started Apr 9 0 Replies

I've got a question about sending analog data back to the GCS through the APM telemetry feed.What I want to do is have a microphone to pick up the shutter beep on my point and shoot camera just to…Continue

Anatomy of a 200km ...crash

Started this discussion. Last reply by moglos Mar 26. 41 Replies

I've got a Cyclops EPO that I'm setting up with a view to attempting a 200km flight (lovely plane, I'm sure it's capable of it), but I've crashed it twice out of three outings, and I've got no idea…Continue

Tags: A, FBW, crash, km, 200

Flip, Crash on Maiden

Started this discussion. Last reply by moglos Nov 16, 2013. 10 Replies

Hi, I've just maidened my 3DR Y6 into the ground, and I'm not sure why. (This is my first multirotor, I've flown a trad heli and fixed wing up until now.)I got it light on the skids for a moment then…Continue

Airspeed varies by up to 50km/hr

Started this discussion. Last reply by moglos Sep 5, 2013. 1 Reply

Hi, I've just had a flight where my airspeed was way out, it was as much as 15m/s or 50km/hr less than the groundspeed on a very calm day.Can anyone help me work out if it is a leak, a sensor error,…Continue

 

moglos's Page

Latest Activity


100KM
moglos replied to Frejus's discussion What plane 2,5m max / 1.5kg max can fly slow and resist wind up to 20mph ? in the group ArduPlane User Group
"I have a 350w motor, and I limit it to 80% to keep my ESC safe. I think 500w is over the top. I use the 220cm wings. I don't know what the stall speed is. I would guess around below 10m/s. Again I did all my testing in auto mode, if it…"
Apr 10

100KM
moglos replied to Frejus's discussion What plane 2,5m max / 1.5kg max can fly slow and resist wind up to 20mph ? in the group ArduPlane User Group
"I like my Maja. It can carry the camera payload mounted under the wings. I've flown mine in 50km/hr winds, I wouldn't do it again, but it can handle it. Landing was the toughest part. I've flown mine with 1.6kg of payload and I felt…"
Apr 10

100KM
moglos posted a discussion

Send analog data over telemetry

I've got a question about sending analog data back to the GCS through the APM telemetry feed.What I want to do is have a microphone to pick up the shutter beep on my point and shoot camera just to verify that it's working. My initial plan was to send the sound back using a FPV transmitter, but now I wonder if I can do away with that and send the signal back via the telemetry feed, I couldn't listen to it, but I could watch the trace in the tuning graph to verify that it is working. Is it…See More
Apr 9

100KM
moglos replied to Frejus's discussion Favouring upwind slow flight for taking pictures in the group ArduPlane User Group
"I bought a microphone, too easy. But now I wonder if I need the FPV transmitter at all. Is it possible to hook the microphone up to an APM analog input and see that data via telemetry. I don't need to hear the sound, just see some signal on the…"
Apr 8

100KM
moglos replied to Frejus's discussion Favouring upwind slow flight for taking pictures in the group ArduPlane User Group
"It can do more than that. The same way you program your transmitter to give an underminimum value for the throttle channel by setting the throttle channel to a value lower than the usual range. Do that as normal, but put the gentled channel switch…"
Mar 26

100KM
moglos replied to moglos's discussion Anatomy of a 200km ...crash
"Yes I straightened it, I twisted it by hand in the direction I wanted, then ironed it top and bottom and left it to cool. I had to do that twice and then it was perfect. That was last night, I checked it again and it was still perfect. Thanks for…"
Mar 26
jg replied to moglos's discussion Anatomy of a 200km ...crash
"If you didn't have to trim aileron from hand launch to flight speed it won't need any.  Only the elevator will change with speed.  Congrats!  Did you end up straightening the wing?"
Mar 26

100KM
moglos replied to moglos's discussion Anatomy of a 200km ...crash
"IT FLIES!!!   I've solved my gremlin.  Thank you to everybody that offered help on this issue.  I started with a couple of hand launches without the motor to see how it glided, and it was perfect. Then I did one at 50%…"
Mar 26
jg replied to moglos's discussion Anatomy of a 200km ...crash
"Well I can't say for sure that is a smoking gun, but I would say those measurements would be a smoldering fire at the very least.  That would cause a roll to the right and it would get worse as the speed increased.  Fixing it is easy.…"
Mar 25

Moderator
Graham Dyer replied to moglos's discussion Anatomy of a 200km ...crash
"A little judicious application of heat from a heat gun can help fix a bit of wing twist. I put a weight on and then blow a little heat and let the whole thing cool down. Check and re-do if needed."
Mar 25

100KM
moglos replied to moglos's discussion Anatomy of a 200km ...crash
"Hi jg I placed my wings on blocks to give the servos and control horns some clearance and measured the distance from the middle of the leading edge to the block, and did the same for the trailing edge. Here are the results.   left wing right…"
Mar 25

100KM
moglos replied to moglos's discussion Anatomy of a 200km ...crash
"Yes in APM only. The APM setup for a V tail said don't change Tx settings. All the V tail mixing happens in the APM.  In Manual mode there is no Rudder-Aileron mixing, but in FBW modes there is. There is rudder and elevator. I used…"
Mar 24

100KM
Trung Nguyen replied to moglos's discussion Anatomy of a 200km ...crash
"Did you have any Rudder-Aileron mixing? (APM or Tx)"
Mar 24

100KM
moglos replied to moglos's discussion Anatomy of a 200km ...crash
"The ailerons weren't level after trimming, the right was about 1-2mm down, and the left 1-2mm up. The Vtail wasn't perfectly straight, the tip of the left side was about 2cm higher. That would give some unwanted yaw to the right when I…"
Mar 24
jg replied to moglos's discussion Anatomy of a 200km ...crash
"If your ailerons are not equal in deflection after trimming something isn't straight.  You can only trim for one speed.  Below that speed the trim will be not enough, and above that speed the trim will be too much.  Also the wing…"
Mar 24

100KM
moglos replied to Frejus's discussion Favouring upwind slow flight for taking pictures in the group ArduPlane User Group
"Sure. You are talking about the APM failsafe that is setup to RTL. Receivers have a failsafe function too, you'll have to setup the receiver to output a very low throttle signal when it stops receiving the transmitter signal. That's the…"
Mar 24

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Heli and fixed wing

Moglos's Blog

Anatomy of a 126 km Flight

Posted on January 28, 2014 at 3:30am 28 Comments

Last month I detailed my plans and preparation for an attempt at a 100km flight in a blog here.

Well yesterday the weather was ideal and my preparations (nearly) complete so I went for it and achieved a flight distance of 126km in a time of 2 hr 46 min 40 sec.



I can't attach my log file here because it's too big. It's 15MB and there's a 7MB limit. Any ideas how I…

Continue

Whale Rescue

Posted on January 20, 2014 at 4:24am 4 Comments

On the weekend I flew in support of a whale rescue at Farewell Spit in Golden Bay, New Zealand at the invitation of Project Jonah, a whale rescue NGO

https://www.facebook.com/projectjonah

About 60 pilot whales had stranded over night high up the beach. About 10 died…

Continue

Anatomy of a 100km attempt

Posted on December 12, 2013 at 3:30am 73 Comments

I'd like to fly my plane 100km. Partly to earn the cool badge, but mostly to see if I can.

The airframe is a Bormatec Maja airframe which is made from EPP, has a wingspan of 2.2m and an empty weight of 2kg.

I've been tuning it over the last several months to get the best efficiency I can. I've…

Continue

Comment Wall (4 comments)

At 7:39pm on April 23, 2013, Franco Marinelli said…

hi moglos, sorry but I dont have it! 

At 10:45am on July 1, 2013, John Rankin said…

Hi Franco,

I have not been on the site for a while as all of our work is commercial but I do follow what everybody is doing on a regular basis.  Great job everyone you are doing amazing things with the tools that you have.  Although I am the owner of the company I am not the only one in control and the talk in the office is to stop discussing the work we are doing.  There is a lot of competition in this field which we believe is going to expand rapidly in the next few years and we don't want to sell the farm.  To others that have inquired about the software we are using, it is a beta software that is not yet released.  It is not owned by my company; we are simply the beta testers and to my knowledge the only users in North America.  As for the Maja I think I can give you some advice on the airframe.  It is a plane with excellent performance as a UAV platform in most conditions.  It is very stable and flies beautiful straight, flat lines collecting very usable photography. The Maja does have a terrible tendency to stall when banking with a tail wind above 20 kph .  The minimum throttle must be set high to avoid this problem; we keep ours at 50%.  Another problem with the plane is its fragility.  Landing in tall grass or brush can damage the soft foam by cutting into it.  We wish it were made of EPO (Bormatec please listen to us!).  The elevator, rudder, and ailerons are particularly sensitive to the grass shredding them. We have adjusted to this by adding carbon fiber to those surfaces and have since reduced the problem although those surfaces still tend to tear from the frame at the hinge.  Add some Beacon's Foam Tac glue (the best glue we have found on foam planes, bar none) at the hinge and it reduces the issue.  Any hard landing with either the tail or nose first will invariably result in damage.  In our testing we have literally broken three Maja completely in half and one into three pieces.  We have modified the plane by cutting the bottom of the plane in half (with a hot wire) and inserting two carbon fiber rods the full length of the plane on the left and right and then gluing (with Beacon's Foam Tac) the two pieces back together.  Hard landings are no longer an issue and we have not had a problem since, even if we smash into the ground.  The motor mount on the back is also an issue.  We have had the entire motor mount rudder assembly rip off twice while in flight probably due to our high AUW of 3.5 kg.  To fix the mount we cut the mount in half and insert two carbon fiber rods on the left and right, glue it back together and then mount the motor plate with two large nylon bolts directly into the carbon fiber rods.  For extra security we then use 1/2" Velcro straps to hold the entire rudder assembly to the body.  Those white plastic pins often break and are not sturdy enough for our uses.  As for the settings we started with the Conservation Drone's

http://conservationdrones.org/

settings and then did a few modifications as needed.  If you are going to fly with a high AUW ensure that you have a powerful enough motor, esc, prop combo and complete all the re-enforcements of the body or you will be in trouble.  The plane ALWAYS dips precariously close to the ground on launch so you will need a very high launch area.  We hand launch from a pad on top of our field truck and skim the ground on every take off.  I hope this information helps anyone out there and if you have any other questions please feel free to ask. 

John

At 12:46pm on January 5, 2014, Vince Lang said…

Dear Moglos, 

I've just read Your 100km attempt. I was impressed by the research You did on motor prop confogs. My Maja is on the way from Germany, but I have not yet ordered any electric parts. Im not willing to attempt anything like You, just want to set up a system for FPV maybe later add a PS camera on the plane. Could You give me a good starting point for motor/prop setup: I would appreciate any help.

Thanks

-vince

At 12:15am on January 6, 2014, Vince Lang said…

Hi Moglos,

thanks for the fast reply, I was thinking about that motor too, good to know I wasn't that off with my concept. Im sending some good weather from Europe for your attempt, keep us posted :) Good luck! 

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