Me too, please. Thanks. noman.s...@verizon.net ----- Original Message ----- From: "robert cooper" <kr2coo...@earthlink.net> To: "KRnet" <kr...@mylist.net> Sent: Sunday, January 11, 2004 9:16 AM Subject: Re: KR>Throttle quadrant
> Serge > I would also like to have some pictures of the quadrant. If you have some > digital pictures please email me with pictures attached > mailto:kr2coo...@earthlink.net > Thanks > Jack Cooper > > > > [Original Message] > > From: Bob Stone <rsto...@hot.rr.com> > > To: <serge.vi...@ate-international.com>; KRnet <kr...@mylist.net> > > Date: 1/11/04 9:40:01 AM > > Subject: Re: KR>Throttle quadrant > > > > Serge, > > How about some pictures of your throttle quadrant at least what > one would need to make one like it. Of course this will have to be off net > since no attachments are allowed. > > > > Bob Stone, Harker Heights, Tx > > rsto...@hot.rr.com > > > > > > > > ----- Original Message ----- > > From: "Serge F. Vidal" <serge.vi...@ate-international.com> > > To: "'KRnet'" <kr...@mylist.net> > > Sent: Saturday, January 10, 2004 5:34 PM > > Subject: KR>Throttle quadrant > > > > > > > Since I am now many miles away from my KR2, I keep myself busy by > making > > > some parts that do not require many measurements. I started with > redoing the > > > throttle quadrant. Of course, you don't need a throttle quadrant if > you are > > > happy with a push-pull, vernier type throttle, but if, like me, you > like to > > > fly "HOTAS" (Hands on Throttle and Stick, another militaruy acronym), > > > fighter style, a quadrant is not only nice to have but also fairly > easy to > > > make. > > > Today, ZS-WEC (that's my KR2) just has a boat type aluminum handle > that is > > > simply bolted through a hole to a plate along the side wall, and > tightened > > > with a locknut. It has worked fine for eight years, but it lacks two > things: > > > adequate protection, and adjustable friction. > > > > > > My new throttle is now finished. I am very happy with the result. In > fact, > > > it is the best looking part I have ever made. Pictures available, as > well as > > > Power Point templates to cut the parts, if you want to replicate it. > It is a > > > bit overdesigned, but as Tony Bingelis puts it, it's the single most > used > > > control, so, maybe it's worth a few extra grams and added effort. > > > Here are a few advices that will save you some trial and error. > > > > > > - The most difficult part to find is the knob. Ideally, what you need > is a > > > screw, anything between 6mm and 12mm, at least 30mm in length, with a > knob > > > attached. I found one at a hardware shop, but I have no clue for what > it is > > > normally used. If you can't find anything, a butterfly (wing) screw > will do. > > > - The easiest way to make the throttle lever, and more important, the > > > throttle friction knob work, is to avoid any friction between the > knob and > > > the lever. Otherwise, the action of the lever will loosen the knob. > So, make > > > the knob so as its axle goes freely through the handle, and design > your work > > > so as if you tighten the knob, it squashes the lever and its friction > > > washers between two plates. > > > - The best washers for friction seem to be Nylon washers. > > > - You will save a lot in working time and design complexity by using > Rivnuts > > > (these are sorts of large rivets, threaded on the inside, that you > can rivet > > > to a plate pretty much like a Pop rivet). > > > > > > Here is what I did: > > > > > > - The throttle is basically made of one plate (the handle) squashed > between > > > two other plates (the base plate and the cover plate), with everything > > > adequately spaced. > > > - I cut the support plate out of a 2mm aluminium sheet, hard grade > (2024T3), > > > and the cover plate out of a 1mm sheet. I think 1mm everywhere would > work > > > just as fine. > > > - I then rivetted one 8mm thread Rivnut to the plate, at the > position of > > > theknob axle. This is the thread where the friction knob will screw > in. > > > - I riveted four 5mm Rivnuts at the corners, facing up (these hold > the two > > > plates together) > > > - I cut 4 spacers out of an aluminum tube. These go at the 4 corners, > and > > > are held by 5mm screws that thread in the Rivnuts. I now had two > plates, > > > spaced together. > > > - I made a small bush to go through the handle, to avoid friction > with the > > > knob thread (frankly, an overkill). > > > - I put Nylon washers on either side of the handle. > > > - I then made a spacer to fill the space between the top washer and > the > > > cover plate. The spacer consists of three large washers piled up and > glued > > > together with Epoxy. > > > - And that's it! The knob goes through the cover plate, then the > spacer, > > > then top washer, then handle plate, then bottom washer, then Rivnut; > when > > > you tighten it, the cover plate bends slightly, and squashes the > handle > > > between the two Nylon washers. The friction remains even, even after > 100 > > > push-pull actions (Yes, I tried). > > > - The rest is details: giving the hande a double bend to make it > S-shaped, > > > making wood stocks, fitting holes, and of course, the throttle cable > > > mounting hole and screw. Oh, by the way, when you make your spacers, > check > > > how much thickness you will need for your cable attachment, and allow > for > > > some extra clearance. > > > > > > That throttle is very simple, yet, it's still 45 parts altogether! > > > Unbelievable how fast the parts count goes up! > > > > > > Here is the datasheet. > > > > > > Throttle data > > > > > > Mass: 188 g > > > Travel: 7.9mm > > > Overall dimensions with handle at centre position: Height 151mm > Length 98mm > > > Width 50mm > > > Overall dimensions with travel: Height 151mm Length 200mm Width 50mm > > > > > > > > > Parts list > > > > > > 1. Base plate, aluminium, 2024T3, 2mm thick 1 > > > 2. Rivnut, 8mm 1 > > > 3. Rivnut, 5mm 4 > > > 4. Spacers, aluminium, 12.7mm OD, 10mm ID, L18mm 4 > > > 5. Capscrew, 5mm x 20mm 4 > > > 6. Washer, 5mm 4 > > > 7. Self tapering screw, SS, 3.5mm x 16mm 6 > > > 8. Face plate, aluminium, 2024T3, 1mm thick 1 > > > 9. Throttle handle, aluminium, 2024T3, 3mm thick 1 > > > 10. Wood stocks, seligna wood 2 > > > 11. Screw, 3mm x 21 2 > > > 12. Washer, 3mm 2 > > > 13. Locknut, 3mm 2 > > > 14. Friction adjustment screw, 8mm x 30mm 1 > > > 15. Washer, 8mm 1 > > > 16. Spacer, 8mm ID x 25mm OD x 9mm thickness 1 > > > 17. Washer, Nylon, 9mm 1 > > > 18. Bush, 8mm ID x 9mm OD x 4.2mm 1 > > > 19. Washer, Nylon, 8mm 1 > > > 20. Button head screw, 4mm x 16mm 1 > > > 21. Washer, 4mm 2 > > > 22. Locknut, 4mm 1 > > > 23. Throttle cable mounting bracket, alumiinum, 2mm thick 1 1 > > > > > > Tools list for mounting > > > > > > 1. Screwdriver, flat > > > 2. Allen key, 2.5mm > > > 3. Spanner, 7mm > > > 4. Allen key, 4mm > > > > > > Serge Vidal > > > KR2 ZS-WEC > > > Tunis, Tunisia > > > > > > > > > _______________________________________________ > > > see KRnet list details at http://www.krnet.org/instructions.html > > _______________________________________________ > > see KRnet list details at http://www.krnet.org/instructions.html > > > > _______________________________________________ > see KRnet list details at http://www.krnet.org/instructions.html
