Return-Path: Sender: (Marvin Kaye) To: lml Date: Sat, 05 Jul 2003 19:44:20 -0400 Message-ID: X-Original-Return-Path: Received: from m9.nyc.untd.com ([64.136.22.72] verified) by logan.com (CommuniGate Pro SMTP 4.1b8) with SMTP id 2457030 for lml@lancaironline.net; Sat, 05 Jul 2003 19:09:21 -0400 Received: from cookie.untd.com by cookie.untd.com for <"O3/roEPyFF5b0Xt7Kt8Vxgxck2tmEBdpTZB4pTFd8bOWdtbvh/OmYg==">; Sat, 05 Jul 2003 19:08:24 EDT Received: (from rcalden@juno.com) by m9.nyc.untd.com (jqueuemail) id H4C2MNXK; Sat, 05 Jul 2003 19:08:24 EDT X-Original-To: lml@lancaironline.net X-Original-Date: Sun, 6 Jul 2003 06:06:11 -0500 Subject: Re:Electrical power budjet X-Original-Message-ID: <20030706.060704.-412595.2.rcalden@juno.com> X-Mailer: Juno 5.0.27 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary=--__JNP_000_7f3e.6acd.0daa X-Juno-Line-Breaks: 8-6,7,10-56,59-60,63-64,69-72,73-32767 From: Richard C Alden This message is in MIME format. Since your mail reader does not understand this format, some or all of this message may not be legible. ----__JNP_000_7f3e.6acd.0daa Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Rob, et al Here's the electrical load analysis for my 320. This was published in the LNN in the mid 90's. The analysis was modelled from the analysis for a Grumman AA5-A Cheetah. CONTINUOUS LOADS Oil Temp gage 0.50 Fuel gage 0.03 Fuel gage 0.03 Battery relay 0.60 Strobes (3) Whelen 7.00 Pitot heat (deactive, 6.5) Nav lites (3) Whelen 5.60 Panel lites 4.25 Cabin lite 0.25 Turn/bank (Navaid A/P) 0.30 Autopilot (Navaid) 1.25 Hobbs hour meter 0.01 Clock 0.00 Graphic Engine Monitor 0.75 Master warning unit 0.08 Total continuous 20.65 AVIONICS LOADS Narco AT150 xpdr 1.60 Narco AR850 encoder 0.35 King KX155 nav/com 0.70 King KI 209 OBS 0.20 Michel MX11 com 0.90 GPS (Magellan Skynav) 0.30 RST 504 Audio panel 1.00 RST 123 Marker rcvr 0.10 WX-8 Stormscope 0.35 Total Avionics loads 5.50 Total continouous loads 26.15 SHORT TERM LOADS Fuel pump 0.65 Flaps 8.00 Landing light 7.50 Landing gear 29.00 Radio xmit (delta amps) 6.80 Total short term loads 51.95 Total max load 78.10 Note that the alternator field current does not enter into this. (For what it's worth, I have a 5A CB protecting that circuit - per B&C instructions.) The regs for certificated A/C require that the continuous loads not exceed 80% of the alternator rated output. Experimentals do not have to meet that, as I understand it, but it seems to be a good standard. I am flyiny with a Nippendenso 35A alternator from Mark Landoll, and have had no problems. With the gear in transit, I see a healthy discharge on the ampmeter, but not to worry. When (and if) I activate the probe heat, I'm not going to worry about that either. Not all the continuous loads are really continuous. Dick Alden LNC2/320.....N425A Ft Worth, Spinks (FWS) ----__JNP_000_7f3e.6acd.0daa Content-Type: text/html; charset=us-ascii Content-Transfer-Encoding: quoted-printable

Rob, et al

Here's the electrical load analysis for my 320. This was = published in=20 the LNN in the mid 90's. The analysis was modelled from the analysis = for a=20 Grumman AA5-A Cheetah.

CONTINUOUS LOADS

Oil Temp gage =20 =20 0.50

Fuel gage =20 =20 =20 0.03

Fuel gage =20 =20 =20 0.03

Battery=20 relay &= nbsp; &= nbsp; 0.60

Strobes=20 (3) Whelen = =20 7.00

Pitot heat (deactive, 6.5)

Nav lites (3) Whelen =20 5.60

Panel =20 lites &= nbsp; &= nbsp; 4.25

Cabin lite =20 =20 =20 0.25

Turn/bank (Navaid A/P) = =20 0.30

Autopilot (Navaid) =20 1.25

Hobbs hour meter =20 0.01

Clock = ; &= nbsp; &= nbsp;0.00

Graphic Engine Monitor = =20 0.75

Master warning unit =20 0.08

Total=20 continuous = ; 20.65

AVIONICS LOADS

Narco AT150 xpdr =20 1.60

Narco AR850=20 encoder 0.35

King KX155=20 nav/com =20 0.70

King KI 209 OBS =20 0.20

Michel MX11 com =20 0.90

GPS (Magellan Skynav) 0.30

RST 504 Audio=20 panel &= nbsp;1.00

RST 123 Marker=20 rcvr =20 0.10

WX-8 Stormscope =20 0.35

Total Avionics=20 loads &= nbsp; 5.50

Total continouous loads = ;=20 26.15

SHORT TERM LOADS

Fuel=20 pump = ; &= nbsp; 0.65

Flaps = ; &= nbsp; &= nbsp; 8.00

Landing=20 light &= nbsp; &= nbsp; 7.50

Landing=20 gear = ; &= nbsp;29.00

Radio xmit (delta=20 amps) 6.80

Total short term=20 loads &= nbsp;51.95

Total max=20 load = ; 78.10

Note that the alternator field current does not enter into this. (For = what=20 it's worth, I have a 5A CB protecting that circuit - per B&C=20 instructions.)

The regs for certificated A/C require that the continuous loads not = exceed=20 80% of the alternator rated output. Experimentals do not have to meet= =20 that, as I understand it, but it seems to be a good standard.

I am flyiny with a Nippendenso 35A alternator from Mark Landoll, and = have=20 had no problems. With the gear in transit, I see a healthy discharge = on=20 the ampmeter, but not to worry. When (and if) I activate the probe = heat,=20 I'm not going to worry about that either. Not all the continuous = loads are=20 really continuous.

Dick Alden

LNC2/320.....N425A

Ft Worth, Spinks (FWS)

----__JNP_000_7f3e.6acd.0daa--