F-86 Throttle Quadrant project

[jocko417]

Oops, forgot H - 198 mm.

Circumference - 41.45 mm

Edited November 22, 2024 by jocko417

[jocko417]

Found a protractor, didn’t have to… your guesses were bang on, 60 deg throttle throw (idle stop at 18 deg but this was adjustable) overall and throttle grip angle 150 deg.

[Madpie]

On 11/23/2024 at 4:35 AM, jocko417 said:

Oops, forgot H - 198 mm.

Circumference - 41.45 mm

Hey is that circumference of the grip right? Or is that the radius or diameter?
Because if its the circumference then the radius is only 7mm and I feel like thats not girthy enough

Edit: I just assumed it was diameter

I'm bodging my way through this because I havent learned forms in CAD from youtube yet, maybe I'll look back and laugh in a years time.
Are you able to tell me the radius from the centre of the buttons to the edges too please?
And also the angle from directly above?

Edited December 1, 2024 by Madpie

[Madpie]

As for the mechanics, I prototyped something the other day that uses a hall sensor and a flange bearing. You just need a 19mm drill bit for some aluminum.

It jitters a bit so I'm hoping a capacitor I'm getting delivered fixes that

[jocko417]

Yes, diameter. No idea why I wrote circumference…..

[jocko417]

Edited December 5, 2024 by jocko417

[jocko417]

I took the above pic of another throttle grip in my collection - from an early Canadair Sabre... Early F-86s had black cockpits and hardware. Sometime around 1953 they switched to grey cockpits and the throttle grip changed too (stick grip stayed black). I chose this pic because the light picks up the facets on the top surface of the black throttle easier than on the matte grey ones. Measurements are in degrees.

The portion of the throttle top with the speed brakes switch housing is "flat", or 90 degrees to the grip itself. The push button housings are angled away 30 degrees from the flat portion, and the angle between the two housings is 20 degrees.

 

The push button housings "blend together" near the front of the grip. Kind of hard to picture but here goes:

As you can see the bottom of the microphone push button housing hits the grip at not quite 90 degrees. You can also see how it starts to blend forward of the button.

Edited December 6, 2024 by jocko417

[jocko417]

The buttons themselves are recessed. The buttons are 9mm in diameter, and from the center of the button to the edge of the recess it sits in is about 9mm, with another 3.5mm or so to the outside edge of the grip.

Another important thing about these throttle grips, note the angle between the speed brakes switch axis of movement compared to the axis of movement of the throttle lever itself: it is the outboard flat edge of the throttle that is pretty close to parallel to the movement of the throttle, NOT the speed brakes switch. A couple of pics to illustrate:

 

F-100 on top, late model Canadair F-86 on bottom (essentially same grip used for both).

Again, note the axis of the speed brake switch vs the mic pushbutton vs the fore and aft throttle movement...

Edited December 6, 2024 by jocko417

[jocko417]

Oh, and the U-2C used the same grip... only GREEN!

[Madpie]

Many thanks for all the measurements. I think the U2 is practically just a Starfighter with glider wings and no burner so I'm not surprised it used a similar throttle!

 

Now I'm imagining flying a Starfighter with a yoke

Edited December 6, 2024 by Madpie

[Hunting_Fox]

So for reasons, I got very interested in rebuilding an F-86 throttle unit. I saw others had previously tried in this forum thread, but haven't gotten to the end (yet). So I started designing one myself.

Right now, main design work on the grip part is done. I still need to incoorporate the manual ranging mechanism (which is what the two bearing units and upside down Hall-effect sensor board are for). After that, it is time to design the throttle lever and the flap lever to be put below this grip.

I should also be getting some parts in the coming few days so I can actually start trying to assemble this thing (and to probably troubleshoot a bunch of design issues with this first design)

I have tried my best to keep this design as easy as possible to 3D print, and it should hopefully not require a great amount of supports

The top half is to be printed right side up, and the bottom half is to be printed upside down.
2 threaded inserts will be inserted into the bottom half, and 2x M3x20 bolts will keep the two halves joined together

The button switches are kept in place with little holders that they are screwed into (this should hopefully also make it easier to adjust the design to use other parts if my ones aren't available somewhere else). These holders should not be able to move about once the grip is assembled
The airbrake switch also holds down the top "airbrake switch guard" The real thing has some smaller bolts there, but I want to try avoiding putting those bolts in my design if possible.

I'd really like to thank the people in this forum thread who posted pictures and measurements, this thread, along with T.O. 1F86F-4 have been my main two sources for modelling this grip. I'd love to hear your feedback!

Edited Monday at 05:16 PM by Hunting_Fox