[simpits-tech] Dual Differential Toe Brakes.. How? (I'm stuck!)
Craig Rochester
simpits-tech@simpits.org
Thu, 14 Aug 2003 15:44:27 -0400
This is a multi-part message in MIME format.
------=_NextPart_000_000B_01C3627A.F1A3C580
Content-Type: text/plain;
charset="iso-8859-1"
Content-Transfer-Encoding: 7bit
I made a mechanism to rotate a pot with very little travel; 0-1/8" --> 0-60 deg . It also has no slop due to
the design. I posted about it at FW(3/4 down):
http://forums.frugalsworld.com/vbb/showthread.php?s=&threadid=22502&perpage=40&pagenumber=2
Pic --> http://pages.zdnet.com/johncraigrochester/sitebuildercontent/sitebuilderpictures/cambearing04.jpg
This makes a sort of potentiometer load beam. Looks bad, feels good. :)
Craig R.
-----Original Message-----
From: simpits-tech-admin@simpits.org
[mailto:simpits-tech-admin@simpits.org]On Behalf Of Matt Bailey
Sent: Thursday, August 14, 2003 2:02 AM
To: simpits-tech@simpits.org
Subject: Re: [simpits-tech] Dual Differential Toe Brakes.. How? (I'm
stuck!)
I've wondered about the possibility of using pressure sensors for toe
brakes before. In little general aviation planes (and perhaps bigger
stuff) you really don't have any feedback from the brakes (aside from
the built-in springs) until you get almost to the extent of the pedal's
travel. It's comparable to the response you get from bicycle
brakes.....a lot of "dead zone", then the brakes sorta "hit a wall" and
braking is controlled mainly by pressure, with very little actual
movement. It seems like pressure sensors would be ideal.
Actually, I used a pretty decent pair of pedals at school (I think they
are PFC) and they seem to be using springs (or perhaps bungees) and
potentiometers that work through the entire (or at least most of the)
range of the pedal's travel....it feels totally weird and unrealistic.
-Matt Bailey
Bubba wrote:
>
> Gene Buckle wrote:
> > Ok, here you go...
> >
> > http://www.simpits.org/fileproc/files/lame_drawing.JPG
>
> Ok, that's entirely too complicated ;)
>
> Anyone want a real hydraulic brake setup? Piece of cake to make it work.
> Attach the master cylinders to the pedals, run the hoses to a convenient
> spot for the slave cylinders, wire pot(s) into Epic or whatever. I've been
> making small pneumatic and hydraulic cylinders lately and haven't really had
> anything useful to do with them yet. Sounds like a perfect spot :)
> --
> Steve
> mysticz28@swbell.net
> The only difference in 40 and 140 is the sirens and flashing lights
> behind you.
_______________________________________________
Simpits-tech mailing list
Simpits-tech@simpits.org
http://www.simpits.org/mailman/listinfo/simpits-tech
To unsubscribe, please see the instructions at the bottom of the above page. Thanks!
------=_NextPart_000_000B_01C3627A.F1A3C580
Content-Type: text/html;
charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD><TITLE></TITLE>
<META http-equiv=3DContent-Type content=3D"text/html; =
charset=3Diso-8859-1">
<META content=3D"MSHTML 6.00.2800.1170" name=3DGENERATOR></HEAD>
<BODY>
<P><FONT size=3D2>I made a mechanism to rotate a pot with very little =
travel;=20
0-1/8" --> 0-60 deg . It also has no slop due to the=20
design. I posted about it at FW(3/4 down): <A=20
href=3D"http://forums.frugalsworld.com/vbb/showthread.php?s=3D&thread=
id=3D22502&perpage=3D40&pagenumber=3D2">http://forums.frugalsworl=
d.com/vbb/showthread.php?s=3D&threadid=3D22502&perpage=3D40&p=
agenumber=3D2</A></FONT></P>
<P><FONT size=3D2>Pic --> <A=20
href=3D"http://pages.zdnet.com/johncraigrochester/sitebuildercontent/site=
builderpictures/cambearing04.jpg">http://pages.zdnet.com/johncraigrochest=
er/sitebuildercontent/sitebuilderpictures/cambearing04.jpg</A>=20
<BR><BR><FONT face=3DArial color=3D#0000ff>This makes a sort of =
potentiometer load=20
beam. Looks bad, feels good. :)</FONT></FONT></P>
<DIV><FONT size=3D2><FONT face=3DArial =
color=3D#0000ff></FONT></FONT> </DIV>
<DIV><FONT size=3D2><FONT face=3DArial color=3D#0000ff>Craig =
R.</FONT></DIV>
<P><BR>-----Original Message-----<BR>From: =
simpits-tech-admin@simpits.org<BR>[<A=20
href=3D"mailto:simpits-tech-admin@simpits.org"=20
target=3D_blank>mailto:simpits-tech-admin@simpits.org</A>]On Behalf Of =
Matt=20
Bailey<BR>Sent: Thursday, August 14, 2003 2:02 AM<BR>To:=20
simpits-tech@simpits.org<BR>Subject: Re: [simpits-tech] Dual =
Differential Toe=20
Brakes.. How? (I'm<BR>stuck!)<BR><BR><BR>I've wondered about the =
possibility of=20
using pressure sensors for toe<BR>brakes before. In little general =
aviation=20
planes (and perhaps bigger<BR>stuff) you really don't have any feedback =
from the=20
brakes (aside from<BR>the built-in springs) until you get almost to the =
extent=20
of the pedal's<BR>travel. It's comparable to the response you get from=20
bicycle<BR>brakes.....a lot of "dead zone", then the brakes sorta "hit a =
wall"=20
and<BR>braking is controlled mainly by pressure, with very little=20
actual<BR>movement. It seems like pressure sensors would be=20
ideal.<BR><BR>Actually, I used a pretty decent pair of pedals at school =
(I think=20
they<BR>are PFC) and they seem to be using springs (or perhaps bungees)=20
and<BR>potentiometers that work through the entire (or at least most of=20
the)<BR>range of the pedal's travel....it feels totally weird and=20
unrealistic.<BR><BR> -Matt=20
Bailey<BR><BR>Bubba wrote:<BR>><BR>> Gene Buckle wrote:<BR>> =
> Ok,=20
here you go...<BR>> ><BR>> > <A=20
href=3D"http://www.simpits.org/fileproc/files/lame_drawing.JPG"=20
target=3D_blank>http://www.simpits.org/fileproc/files/lame_drawing.JPG</A=
><BR>><BR>>=20
Ok, that's entirely too complicated ;)<BR>><BR>> Anyone want a =
real=20
hydraulic brake setup? Piece of cake to make it work.<BR>> Attach the =
master=20
cylinders to the pedals, run the hoses to a convenient<BR>> spot for =
the=20
slave cylinders, wire pot(s) into Epic or whatever. I've been<BR>> =
making=20
small pneumatic and hydraulic cylinders lately and haven't really =
had<BR>>=20
anything useful to do with them yet. Sounds like a perfect spot =
:)<BR>>=20
--<BR>> Steve<BR>> mysticz28@swbell.net<BR>> The only =
difference in 40=20
and 140 is the sirens and flashing lights<BR>> behind=20
you.<BR>_______________________________________________<BR>Simpits-tech =
mailing=20
list<BR>Simpits-tech@simpits.org<BR><A=20
href=3D"http://www.simpits.org/mailman/listinfo/simpits-tech"=20
target=3D_blank>http://www.simpits.org/mailman/listinfo/simpits-tech</A><=
BR>To=20
unsubscribe, please see the instructions at the bottom of the above =
page. =20
Thanks!<BR></P></FONT></BODY></HTML>
------=_NextPart_000_000B_01C3627A.F1A3C580--