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Date: Tue, 5 Jul 2011 12:16:12 +0800
Message-ID: <CAJxaVD2Sb3qBah_fYhaKFgy6E0rzW-7ffVkbWKWTYWRjkxVZ3g@mail.gmail.com>
Subject: Re: [FlyRotary] generator and dyno prop
From: Andrew Martin <andrew@martinag.com.au>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
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how many amps is the Harley generator capable of?

I reckon the calculation for the dyno-prop goes out the window if the 15 to
1 ratio is not adhered to.

Andrew

On Tue, Jul 5, 2011 at 11:51 AM, Ernest Christley <echristley@nc.rr.com>wrote:

> I tested the dyno-prop today.  I had been waiting to complete some rework
> on the Harly-Davidson generator I'm using.  I was trying to pass control
> back to the pilot by putting a solid-state relay inline with the regulator's
> output.  The relay appears to have either interfered with the proper
> operation of the regulator, or caused enough of a voltage drop to make the
> generator unable to charge the battery.  Either way, the relay is out, and a
> 80A fusible link is in.  I'm now getting 13.5V at 4000rpm.
>
> Which leads me back to the dyno-prop.  I got lazy and didn't cut down the
> 88mm wide prop I built.  I didn't want to take the time to balance it again.
>  At 40% throttle, I had the engine up to 4000rpm (1258 at the prop).  That
> would be 26Hp if the prop was of the correct length.  I know I was
> generating more than that, but I haven't a clue how much more.
>
> OAT was somewhere between 97* and hotter-n-hell.  The logs show the MAT was
> 103* (measured at the throttle body).  The graph of the coolant temp climbs
> at a 30 degree angle.  In 50 seconds, I went from 162* to 192*.  That's with
> a blower stuck into the intake for the single radiator.  Luckily, I think
> I've reached the point where I can put the cowl on, and start using the
> second radiator.
>
> --
> Homepage:  http://www.flyrotary.com/
> Archive and UnSub:   http://mail.lancaironline.net:**
> 81/lists/flyrotary/List.html<http://mail.lancaironline.net:81/lists/flyrotary/List.html>
>

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how many amps is the Harley generator capable of?<div><br></div><div>I reck=
on the calculation for the dyno-prop goes out the window if the 15 to 1 rat=
io is not adhered to.</div><div><br></div><div>Andrew<br><br><div class=3D"=
gmail_quote">
On Tue, Jul 5, 2011 at 11:51 AM, Ernest Christley <span dir=3D"ltr">&lt;<a =
href=3D"mailto:echristley@nc.rr.com">echristley@nc.rr.com</a>&gt;</span> wr=
ote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border=
-left:1px #ccc solid;padding-left:1ex;">
I tested the dyno-prop today. =A0I had been waiting to complete some rework=
 on the Harly-Davidson generator I&#39;m using. =A0I was trying to pass con=
trol back to the pilot by putting a solid-state relay inline with the regul=
ator&#39;s output. =A0The relay appears to have either interfered with the =
proper operation of the regulator, or caused enough of a voltage drop to ma=
ke the generator unable to charge the battery. =A0Either way, the relay is =
out, and a 80A fusible link is in. =A0I&#39;m now getting 13.5V at 4000rpm.=
<br>

<br>
Which leads me back to the dyno-prop. =A0I got lazy and didn&#39;t cut down=
 the 88mm wide prop I built. =A0I didn&#39;t want to take the time to balan=
ce it again. =A0At 40% throttle, I had the engine up to 4000rpm (1258 at th=
e prop). =A0That would be 26Hp if the prop was of the correct length. =A0I =
know I was generating more than that, but I haven&#39;t a clue how much mor=
e.<br>

<br>
OAT was somewhere between 97* and hotter-n-hell. =A0The logs show the MAT w=
as 103* (measured at the throttle body). =A0The graph of the coolant temp c=
limbs at a 30 degree angle. =A0In 50 seconds, I went from 162* to 192*. =A0=
That&#39;s with a blower stuck into the intake for the single radiator. =A0=
Luckily, I think I&#39;ve reached the point where I can put the cowl on, an=
d start using the second radiator.<br>
<font color=3D"#888888">
<br>
--<br>
Homepage: =A0<a href=3D"http://www.flyrotary.com/" target=3D"_blank">http:/=
/www.flyrotary.com/</a><br>
Archive and UnSub: =A0 <a href=3D"http://mail.lancaironline.net:81/lists/fl=
yrotary/List.html" target=3D"_blank">http://mail.lancaironline.net:<u></u>8=
1/lists/flyrotary/List.html</a><br>
</font></blockquote></div><br><br clear=3D"all"><br>
</div>

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