Cougar Throttle Hall Effect Potentiometer - Cubpilot Reincarnated!
-
Hi,
i ordered the same Part as 90 deg. (http://www.digikey.de/product-search/de?vendor=0&keywords=TT+ELECTRONICS+6127V1A90L.5)
want test this option.Report follow!
Blue
-
Great Job with the mod. I’m fortunate to have the original cubby hall sensor, and never looked back…
I noted on your image the metal bushes replacing the original plastic throttle shaft bushes.
Can you tell me where you got them and if you think they are still available. Do they help with the stiction issue on the throttle.Ive used a piece of thin aluminium in a 'shovel shape, wrapped on the brake arm, and flat on the curve, to try reduce the stiction. Works but have to re-grease regularly.
Cheers.
-
Hello Fish…. sorry for the late reply. The metal bushes were made by a chap in Australia. I have no idea if he still makes them or not. It was a very long time back. Do they help? I can’t really say. What I think did work was some special very low friction tape wrapped around the cylinder where the brake contacts. I have a large reel of this tape. Where are you? Maybe I can send you some. It need no lubrication and once applied you can forget about it.
-
What kind of tape is that? I have access to just about any kind of tape on the planet. Low friction metallic tape?
-
Teflon tape. Plumbers use it.
-
@16th:
What kind of tape is that? I have access to just about any kind of tape on the planet. Low friction metallic tape?
It’s something like this. It’s blue backed. I bought it a long time ago and still have plenty left. It#s a clear tape once you peel the blue backing off.
If you find a supplier, just ask for a 1 meter sample.
-
The tape is UHMW Ultra High Molecular Weight Polyethylene tape. Kinda like Plumbers tape….but more resistant to abrasion.
Scuba, I have a couple questions:
Have you figured out the dead zone in movement of your throttle with this mod?
Do you think that all Throttle PCB’s would require the same modification taking the resistor out of the Pot VE circuit?
Has your mounting bracket retained it’s integrity in regard to zero movement?And finally…how’s your Refueling skill coming along with your new mod?
-
Truth is I’ve not spent much time on the sim since making modifying the throttle. But with you guys dragging the thread up a few times maybe I will try to find the time! Most of my time is spent writing articles about rare airguns these days.
The tape isn’t anything like plumbers tape from what I remember. I have a big reel of it. So if anyone what some, drop me a message and you can have some for just the cost of the postage/packing as I’m never going to use all of it.
-
Perhaps I will do some inflight refuelling training this weekend as see how I get on.
-
I was thinking about picking up some of those BI 6127 Hall sensors for quite a while, as they’re the ones that Sokol1 likes to use. The main holdup was figuring out how I was going to get a metal mounting bracket and a servo arm to mount it to the throttle, and I think you’ve just given me some valuable clues there. Just gotta find some US suppliers instead.
They’re not just something I need for the Cougar throttle, but also this A-10A throttle conversion project I haven’t finished for a few years.
As for the throttle mods, I had a set of UTM bushings once in my first Cougar; that was sold off a long time ago, only for me to go acquire another one after some withdrawal. Alas, I haven’t found another set of UTM bushings for sale; no tape needed, those things did the job perfectly regarding stiction elimination while keeping the whole thing smooth.
The problem is that nobody other than Ian Johnston can be bothered to make them, and as such, they’ve been out of production like the U2-NXT. For a simple bit of precision machined metal, they’re sure not easy to come by.
That said, I could give the tape a shot, something that should eliminate the “stiction” while adding a bit of damping so it doesn’t feel like I’m moving a wet noodle past the static friction point.
-
I modded my throttle in a similar way to Scubapics . Rather than mounting a link ball on the throttle shaft I took the output shaft from a dead rc servo removed the gear and machined it to the same size and shape as the original pot shaft. With the tqs upsidedown with the handle at or very near the middle of it’s travel,I inserted the modded servo shaft into the original hole formerly occupied by the pot. Installed a 1" long servo arm in a vertical position. The whole affair fits neatly between the throttle shaft and the original pot mount. Install an identical servo arm on the hall sensor. Link balls mount on both arms at the 3/4" holes. Used a timed out linkage from my rc heli to connect.
I’ll try and get some pics . It actually turned out better than it sounds and I use 99.9% of the sensor’s travel split between max and min throttleDave
-
I modded my throttle in a similar way to Scubapics . Rather than mounting a link ball on the throttle shaft I took the output shaft from a dead rc servo removed the gear and machined it to the same size and shape as the original pot shaft. With the tqs upsidedown with the handle at or very near the middle of it’s travel,I inserted the modded servo shaft into the original hole formerly occupied by the pot. Installed a 1" long servo arm in a vertical position. The whole affair fits neatly between the throttle shaft and the original pot mount. Install an identical servo arm on the hall sensor. Link balls mount on both arms at the 3/4" holes. Used a timed out linkage from my rc heli to connect.
I’ll try and get some pics . It actually turned out better than it sounds and I use 99.9% of the sensor’s travel split between max and min throttleDave
Please do post the pics man. I know it’s a PITA to do that, but as good as your description is, it’s still open to reader’s interpretation. Thanks man.
-
Yeah about that. Sorry for the crappy cell phone pics
I used a Novotechnic RSC 2821-110-241-101 sensor ,one of a handful that I “harvested” from a dead case packing machine. A little large but it does fit and works well. Natively 5vdc supply so no issues with the cougar electrics. In the Foxy axis viewer app throttle is smooth as butter,in the pit I can adjust power by increments of 1lb if I am gentle
To set the position of the sensor bracket I installed the linkage, set both the throttle and the sensor to their mid points and used JB Weld to attach the sensor bracket to the TQS base.T fine tune the position I rotate the sensor in it’s bracket so the zero position of the sensor and the throttle coincide
Dave -
I know this is an old thread. I have just retired my 15 or more year old Cougar and purchased a Warthog. I have always wanted to do the Hall Effect upgrade but didn’t want to in any way alter the original product. I realize after looking at your images I just might be able to pull it off without chopping it up.
-
I know this is an old thread. I have just retired my 15 or more year old Cougar and purchased a Warthog. I have always wanted to do the Hall Effect upgrade but didn’t want to in any way alter the original product. I realize after looking at your images I just might be able to pull it off without chopping it up.
and thats the beauty of this mod
-
Compared with the Vipergear sensor, that looks like a whole lot of work.
-
Best part of this mod is it didn’t cost me a dime. I also didn’t want to alter in any irreversible way. So now my throttle has the same precision as my FSSB modded stick, and I have the original gimbals as spare parts jus in case. As for the work, a little fiddly, but worth it.
Dave
-
So will this mod to a Cougar throttle be compatible with the TUSBA? My stock pot is a little spikey after 15 years, but I love the newfound TUSBA functionality.
-
So will this mod to a Cougar throttle be compatible with the TUSBA? My stock pot is a little spikey after 15 years, but I love the newfound TUSBA functionality.
I don’t see why not. If the TUSBA works with a standard Cougar throttle, it should work with this. Have you asked the guys at TUSBA?
-
I read that Cubpilot Ernie is an obituary, that was a sad news since I corresponded with him. Anyone here know where we can order a microstick?