"Ah, thanks Vernon. That would fix it."
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Keshka Kotera
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Keshka Kotera's Discussions
BEC conflict?
Started this discussion. Last reply by Keshka Kotera Apr 27. 2 Replies 0 Likes
Well I probably have been over thinking this but here goes! Most builds for a quad have four ESC's connected to the output rail of the APM. If you are using ESC's that have a BEC then there will be a…Continue
dual power?
Started Mar 24 0 Replies 0 Likes
In playing with the APM 2.0 I wanted to try out the GPS. Under usb power sitting on the window sil it never locks. Hooked up a battery, went outside and after a bit I did get a solid blue led. Walked…Continue
So does variable pitch help at all?
Started this discussion. Last reply by R_Lefebvre Feb 11. 14 Replies 0 Likes
I have looked around the forums and have seen several discussions about variable pitch. Most revolve around construction and configuration.What I want to know, is does it make the quad fly any…Continue
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Vernon Barry replied to Keshka Kotera's discussion BEC conflict?"Already discussed this in some other threads, the power distro board only connects one of the BECs to power the APM and radio, the other ones (5V pins are not connected to anything. This is why it's important to use a power distro board and not…"
Keshka Kotera posted a discussionBEC conflict?
Well I probably have been over thinking this but here goes! Most builds for a quad have four ESC's connected to the output rail of the APM. If you are using ESC's that have a BEC then there will be a conflict between each BEC on the rail. Explaination: Nothing is perfect, if the ESC's are labled A, B, C and D. If ESC A is supplying 5.01 volts and EXC B is only putting out 4.98 there will be a difference on the buss of .03 volts.One of two things can happen. Good: ESC B will sense the higher…See More
Keshka Kotera posted a discussiondual power?
In playing with the APM 2.0 I wanted to try out the GPS. Under usb power sitting on the window sil it never locks. Hooked up a battery, went outside and after a bit I did get a solid blue led. Walked back into the house and set the APM back in the window and the lock stayed. Un plugged the battery, plugged back in the usb. No lock. Question, if have the unit powered up via the battery and hook up the usb at the same time, will this cause any power problems (smoke!). I know my AT Mega board can…See More
DeveloperR_Lefebvre replied to Keshka Kotera's discussion So does variable pitch help at all?
"I'm a big fan of Helis and don't have any quads, so you might think I'd be a proponent of this idea. But I'm not.
There are a number of things going on here.
1. Lifting efficiency. Is it better to use flat…"
Keshka Kotera replied to Keshka Kotera's discussion So does variable pitch help at all?"Still looking for comments from anyone who has flown both types of quad.
Keshka"
"But then you'll have a pitch-yaw coupling or a roll-yaw coupling (depending on which way you orient your reference coordinate system) that you don't necessarily have on multiple independently powered rotors."
Keshka Kotera replied to Keshka Kotera's discussion So does variable pitch help at all?"Thanks for you input Phil!
"
Phil Cole replied to Keshka Kotera's discussion So does variable pitch help at all?"Yaw control comes from the actual accelerating of the motors and props in addition to the torque reaction from the prop drag.
You can easily feel this in a quad held in your hand when you deflect the rudder stick - the initial yaw moment you feel is…"
Keshka Kotera replied to Keshka Kotera's discussion So does variable pitch help at all?"yaw is a function of drag. so reducing pitch will have the same effect as slowing the motor."
"Have a think about how you will manage yaw control..."
Keshka Kotera replied to Keshka Kotera's discussion So does variable pitch help at all?"I can deal with the cost and complexity.....the real question, does it fly better?"
Keshka Kotera replied to Keshka Kotera's discussion So does variable pitch help at all?"Andrew, there will be on one speed control set to constant RPM to drive one motor then four servos to control each boom pitch. So control wise I will have one extra channel for throttle. The pitch controls will use the same channels that would…"
Keshka Kotera replied to Keshka Kotera's discussion So does variable pitch help at all?"
Thanks for your input Dave. I have flown R/C helis for years and I remember the days before collective pitch. Today you can only find fixed pitch on very small 'cheap' copters that are not taken seriously. I have done a…"
Dave Skala replied to Keshka Kotera's discussion So does variable pitch help at all?"That is exactly why we quit working on our idea like that. In the field you want the lowest parts count you can possibly have. And if you can repair it w/o tools thats a big plus as well!"
"I think it would help make it much more complicated...
...and increase the frequency response of your thrust vectoring controller
Adding variable pitch means you have twice as many actuators now - one speed controller and one pitch controller for…"
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PS, I am an Arudino developer
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