light weight version of Igor's logarithimic controls

[Guy Markham]

 Uses .105 wire instead if 1/8", Ball link connectors instead of 1/8" and lightening holes instead of none. Would have  had the parts  cut out by water-jet but not in  my budget! so did it with saw and file 

[gene poremba]

 Looks very clean considering how you say you did it. Nice work....Gene

[Paul Walker]

Wow, you are in Sequim!

Did you know Bob Emmett? He used to live in Sequim.

[Guy Markham]

Moved to Sequim only 3 years ago so never met him but  talked via phone. 

[Ken Culbertson]

Uses .105 wire instead if 1/8", Ball link connectors instead of 1/8" and lightening holes instead of none. Would have  had the parts  cut out by water-jet but not in  my budget! so did it with saw and file 

Steel or Aluminum?

Ken

[Guy Markham]

Made from . Tight -Tolerance Low Carbon Steel 1/16" thick 3" Wide 12"' long from McMaster-Carr.  The rods for the Flap and Elevator are .105 dia ( 1/2 way in size between 3/32" and 1/8") Malin co also available from McMaster-Carr.

[Wolfgang Nieuwkamp]

In Europe we would use  rods of 2,5 mm, which is 0,1016". 
Regards,
Wolfgang

[Wolfgang Nieuwkamp]

Correction:  2,5 mm is 0,984" 
Regards,
Wolfgang

[ericrule]

You did all of this by hand!!! That's pretty impressive.

I guess all those years working as a dentist are proving valuable to you in retirement 

In all seriousness, Guy, that's really nice work. Thanks for sharing it with us.
Regards
Eric Rule

[Paul Walker]

Correction:  2,5 mm is 0,984" 
Regards,
Wolfgang
[/quote

I believe it is 0.0984 inches

[Brett Buck]

Correction:  2,5 mm is 0,984" 
Regards,
Wolfgang

I believe it is 0.0984 inches

     Seems like he did that on a slide rule.

     Brett

[Guy Markham]

Forgot to mention about the brass tubing on the Flap and Elevator rods that are .105 music wire. I took 1/8" OD  brass tubing and cut it length wise with a separating thin disc then placed it on the .105 to crimp the gap to fit the wire !  and used Stay-Brite silver solder " No Worries Mate" 

[Wolfgang Nieuwkamp]

I believe it is 0.0984 inches


     Seems like he did that on a slide rule.

     Brett

Just wanted to see whether everybody is awake or in Christmas mode
Wolfgang

[phil c]

Made from . Tight -Tolerance Low Carbon Steel 1/16" thick 3" Wide 12"' long from McMaster-Carr.  The rods for the Flap and Elevator are .105 dia ( 1/2 way in size between 3/32" and 1/8") Malin co also available from McMaster-Carr.

0.105 music wire is often sold as 7/64 in.  Nominally 0.109in  but depending on the Music wire supplier, that tolerance can be pretty high and go as low as 0.105

[Brett Buck]

Just wanted to see whether everybody is awake or in Christmas mode
Wolfgang

     Did we pass?

     I can hardly wait until the next time someone tells me about how metric "factors of ten" prevent mistakes.

    Brett

[Steve Helmick]

Converting from one to the other is the problem. Sometimes, I'd get a drawing all dimensioned in metric (aka "Demon-tioned in Metric"), in which case I'd just program my CNC mill in metric, which then required that I convert the cutter diameter to metric, but was generally the easier thing to do. I always multiply the metric dimension by .03937 to get an inch dimension. Some prefer to divide by 25.4, which gives exactly the same answer.

Despite the requirement to buy a lot of new tools, I was in favor of changing to metric back around 1980, the last time the USA was considering making the switch. It's pretty silly that there are only two countries in the world that use the King's system, especially since the King doesn't anymore. There are some stupid things about Metric threads that give me pause. I believe European metric thread forms are a wee bit different than the Asian ones, and that England wanted to use a 55 degree thread form instead of the 60 that everybody else has always used...a holdover from Whitworth, I was told. I think they were convinced not to do that. Silly stuff!    Steve

[Ken Culbertson]

Made from . Tight -Tolerance Low Carbon Steel 1/16" thick 3" Wide 12"' long from McMaster-Carr.  The rods for the Flap and Elevator are .105 dia ( 1/2 way in size between 3/32" and 1/8") Malin co also available from McMaster-Carr.

Where did you get the bearing?  Size?

Ken

[Guy Markham]

Bearing: SMB part # MR93ZZ get from  E-Bay or amazon. Use M3x12 stainless socket head cap screw , M3nylon lock nut , M3 stainless steel  flat washer  from RTL fasteners. com  and a 12mm fender washer that I had in my assortment bin.

[Guy Markham]

Forgot to answer the size:   MR93ZZ is 4mm wide by 9mm round with hole for M3 bolt 

[Ken Culbertson]

Forgot to answer the size:   MR93ZZ is 4mm wide by 9mm round with hole for M3 bolt 

Is there a reason not to use a 7mm round?  I have some 4x7x3.  Seems like it is just a matter of cutting the race to fit.

Ken

[Wolfgang Nieuwkamp]

     Did we pass?

     I can hardly wait until the next time someone tells me about how metric "factors of ten" prevent mistakes.

    Brett

Passed, of course. NASA changed to metric in 1990......
Regards,
Wolfgang

[Brett Buck]

Passed, of course. NASA changed to metric in 1990......

  Well, there's 1% of the aerospace market...  And how much of the underlying data - which is universally in conventional units (since it goes back to 1956), not metric - is getting "converted", with the associated risk of unit conversion?

    Brett

[Trostle]

  Well, there's 1% of the aerospace market...  And how much of the underlying data - which is universally in conventional units (since it goes back to 1956), not metric - is getting "converted", with the associated risk of unit conversion?

    Brett

Could that risk possibly interfere with properly launching a billion dollar satellite into orbit?  (Not counting the billion dollar booster cost.)

Keith

[Brett Buck]

Could that risk possibly interfere with properly launching a billion dollar satellite into orbit?  (Not counting the billion dollar booster cost.)

  What do you know about billion-dollar sate....   Oh, never mind!

   We found the original invoice for MILSTAR DFS-1 not too long ago, $1,200,000,000, cash on the barrelhead. I looked for your signature, but that was only on the check!

     Brett

[Steve Helmick]

I keep hoping that somebody will figure out how to make CF control horns to replace the conventional (and heavy!) control horns we've used for 70 years.     Steve

[Istvan Travnik]

Dear Steve,
I take  this as purely aesthetically question. If you can live with a single-piece elevator, you won't need any horn, a simple  2 mm (1/12") thick textilebakelite lever is enough. Easy itself, and easy to adjust. See "Foka Standard" sailplane, or "Wilga" tractor:
A 10 grams heavy horn with lever at the back needs right 30 grams (more than 1 oz. ) counterweight in the nose!
Istvan

[Steve Helmick]

Dear Steve,
I take  this as purely aesthetically question. If you can live with a single-piece elevator, you won't need any horn, a simple  2 mm (1/12") thick textilebakelite lever is enough. Easy itself, and easy to adjust. See "Foka Standard" sailplane, or "Wilga" tractor:
A 10 grams heavy horn with lever at the back needs right 30 grams (more than 1 oz. ) counterweight in the nose!
Istvan

We're familiar with that concept, Istvan, being from the land of Ringmasters and Flite Streaks. What I'm interested in is a CF replacement for the typical flap horn and similar items made for split elevators, commonly used in 99.9% of the competition oriented stunt models. I'm thinking that a flat blade of CF would work to replace the wire part, with another piece epoxied to it for the lever. The sticky wicket is constraining the fore & aft forces commonly handled by brass tubing. Wish I knew a good engineer!       Steve