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From: DAP AERO <craig@dapaero.com>
Mime-Version: 1.0 (1.0)
Subject: Re: hand car
Message-Id: <67B86A63-004B-416A-888C-924ED834EB89@dapaero.com>
References: <4e9327c9-f525-affd-7676-2fb8cc2fa615@nctv.com>
In-Reply-To: <4e9327c9-f525-affd-7676-2fb8cc2fa615@nctv.com>
To: Curtis Andrews <andrewscc@nctv.com>
Date: Fri, 12 Aug 2022 23:12:59 -0700

I spent days looking at modeling and could not figure it out. I don=E2=80=99=
t think it is trivial. I couldn=E2=80=99t even finish the equation that give=
s the position of the pump end of the push rod as a function of the drive ge=
ar position.=20

This last video has the maximum torque point which I think is when the push t=
od id tangent to the drive gear. But that may not be correct.=20

Not sure when I will drive up next, how many windows are there?

> On Aug 12, 2022, at 6:35 PM, Curtis Andrews <andrewscc@nctv.com> wrote:
>=20
> =EF=BB=BFFor something so simple, i spent hours today and can't figure it o=
ut.
>=20
> i have noticed my mental abilities are deteriorating and this is a test of=
 how bad.
>=20
> Oddly, my initial offset which was placed based on the size of a scrap pie=
ce of steel and where it had existing holes seems to be amazingly close.  th=
e connection simply does not work in many other places, one end of the strok=
e or the other is off.
>=20
> Now i am thinking of making the stroke adjustable on the rocker arm so on a=
 down hill movement it moves 21" and uphill it moves 27"   With 24" being th=
e flat track middle stroke.
>=20
> Have never seen any original ones with adjustable pivot point, so don't kn=
ow how useful it will be.  But to do that with the same length arm,   has th=
e offset about 2.5 down at 8.5" from center, and 4.5" down at 12" from cente=
r.  I will built a test tomorrow to see if it works.
>=20
> When are you planning on driving up this way to bring glass?
>=20
> --=20
> Thank You
>=20
> Curtis Andrews
> 1336 E Oak St
> Othello WA. 99344
> andrewscc@aol.com
> 509 346 8108
>=20