Andrew, you have given so much to this hobby over the years. I just want to say a big thank you for your efforts in educating and promoting this wonderful hobby. You are a gentleman and a great teacher. Cheers
Rewatching this video again. I'm setting up an NCFM bluto and I only need like 1/16 movement up and down so trying to figure out the correct holes so your video helped again.
Best explanation I've seen regarding servos and linkages. I now know why my FT Punjet wouldn't fly. Looks like my control horns were mounted to far from the hinge line.
Just awesome. You have helped me probably more than anyone getting into this hobby. I'm getting huge satisfaction out of building and flying, especially scratch building. And videos like this and your other videos on your own a scratch builds are so useful and inspiring. My latest has a soft foam front inspired by the soft noses you put on some of your pushers. Let's see how she crashes!! ✈️ 💥 Cheers!
+Albert Kim (marblekit) Thanks Albert. I had to do this for my own benefit. Couldn't work it out without actually seeing it, and I was surprised by some of the results.
Hey Andrew Thank for all your great videos. I have seen so many of them and learned so much of you. Thanks 🙏🏻 I have a question I hope you will help me with! I have a volantex Phoenix 2000 V2 like you and now the question! The servo arms have one hole that is drilled out so I’m only use that!! The arm on the aileron control surface have 4 holes and like you showed in this video the movement of the aileron is more in the inner holes (close to the wing) and less in the outer holes (away from the wing) but what about the torque? Will I have more torque with the less movement (outer holes). and less torque but more movement with the inner holes? I hope you can help me on this one!! Thanks Andrew
Many thanks for the feedback. Yes correct, movement and torque are directly related. You are best to use the hole that gives the correct range of movement, then you are maximising the torque. The drilled-out holes may not be the best to use.
im so fucking stupid my flying wing crashed bcoz i forgot basic geometry i wanted max throws so i connected rod in both outer hole and for past 5 years i am doing same for getting max throwsssssss
Very good demonstration! I have used trial and error to achieve this with some good results but this really clears it up to me! Thanks for making and sharing this! 👍
Ahahahaa, I forgot how this works and I only performed this a couple of months ago? Early onset, Sheeesh?? Beauty Andino, stoked in Your Intel Mate. Needed to make My Galloping Ghost turn harder as Me Peepers are fried like Me Brain and another Fly away would really ruin this unreal sheeeeeeee!
I recently cut two halves of a wing with a Hotwire and I’m looking to add a 7 degree dihedral before joining the two halves. Do you have any advice on how to accurately cut this angle?
Wow, this is mind boggling to a new guy in the hobby-interesting non the less. But, good information, I was curious why my servos were not moving the control surfaces as much as I thought they should.
Hmm, you can do both, I mean put control horn off the edge and servo arm angled back of the vertical (when they are on the top). Differentials should work against each other. However putting control horn off and servo arm angled to the front is the worst case scenario :) Thanks for posting this INFO!
Howdy Andrew, I never did say thanks for making this video. I had wondered about the impact of the placement of the rods in the horns. Thanks! Daft suggestion: Is it worth also considering the amount of torque that is gained by using a push rod nearer to the center of the servo & also the more "granular control" you get by being further out, rather than closer to the hinge point? Matt
Thanks Matt. Yes torque and control resolution are definitely factors to be considered. More so on super light weight or radical fast models. I think you would be the expert on what's needed for control at speed, feel like doing a demo video?
Howdy Andrew, lol at high speed you need granularity! I recently this found out as I stalled the Teksumo coming out of a epic dive & trying to go straight back up again too quickly with high rates enabled :D
A few important points follow from your good video demo of geometry. 1) Torque - increases the shorter the servo arm 2) Resolution - increases with use of the full movement extent of the servo arm, including extended limits to 120% 3) Slop - introduced to the linkage by ill fitting pushrods, poor gear train manufacture and wear (particularly on metal gears) Torque and resolution are maximized by having the shortest servo arm possible. In some cases it is necessary to drill a hole even closer to the servo than provided. Slop is minimized with a longer servo arm. Excessive slop leads to poor resolution and flutter, particularly in ailerons. Reverse differential is not uncommon on gliders.
Thank you so much for this and all your videos Andrew! No fuss, simple to understand, excellent video quality/presentations and all done in such a calm nice manner by a master modeller. Outstanding sir and much appreciated. Marc
@@AndrewNewton its just(at least in my head at first and then I realized it actually gave me longer flight times in same conditions… I used pre programmed set ups to test it up.) Having it that way, will give ya more lift than decending forces It really works.
Good info, but it's only half the story. You didn't mention anything regarding the torque of the servo or the speed, both of which need to be considered. Another factor is the size of the control surface. Maybe you plan to do a second video on this subject ?
+Andrew Newton Such deviously simple concept, plus if your control services don't need to move very far, with the right linkages you still get to use the whole throw of the servo, an can enjoy the 'increased resolution' ;-)