X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Fri, 25 Jan 2008 19:52:12 -0500 Message-ID: X-Original-Return-Path: Received: from [69.146.254.20] (HELO arilabs.net) by logan.com (CommuniGate Pro SMTP 5.2c4) with ESMTP id 2693194 for lml@lancaironline.net; Fri, 25 Jan 2008 10:49:54 -0500 Received-SPF: none receiver=logan.com; client-ip=69.146.254.20; envelope-from=Kevin@arilabs.net Subject: RE: [LML] Re: Electric Powered Lancair - Long MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C85F69.D5DF59FC" X-Original-Date: Fri, 25 Jan 2008 08:47:29 -0700 Content-class: urn:content-classes:message X-Original-Message-ID: <7141427652BB3049A7DBF1084B67805B0F8500@penumbra.arilabs.net> X-MimeOLE: Produced By Microsoft Exchange V6.5 X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: [LML] Re: Electric Powered Lancair - Long Thread-Index: AchfRKVfDqmuIzDuTd2cbC9GYQpuIAAI3+/w References: From: "Kevin Stallard" X-Original-To: "Lancair Mailing List" This is a multi-part message in MIME format. ------_=_NextPart_001_01C85F69.D5DF59FC Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable You could always go Nuclear....;) =20 http://www.nextenergynews.com/news1/next-energy-news-toshiba-micro-nucle ar-12.17b.html =20 Kevin ________________________________ From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of Brent Regan Sent: Friday, January 25, 2008 4:19 AM To: lml@lancaironline.net Subject: [LML] Re: Electric Powered Lancair - Long =20 Interesting analysis Jim. A quick calculation of my IV-P's power system energy density (stored useful energy that will come out the prop flange divided by the weight of the engine and the fuel) gives a figure of 0.8 KwHr/Lb. This compares to the current (npi) technology of 0.044 KwHr/Lb (battery,+motor+controller) giving a ratio of 18:1. It is therefore true that having batteries with 10X the energy density would make them competitive with hydrocarbons BUT the battery article did not tell the full story. The density improvement was in the silicone ANODE only. The cell now becomes cathode limited and the true improvement in energy density at the cell level is only 2:1. Not shabby, but a long way from 10:1. Technology marches on and though it may be too soon to be scrapping the old four banger, it's not too soon to dream. Regards Brent Regan ------_=_NextPart_001_01C85F69.D5DF59FC Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

You could always go = Nuclear….;)

http://www.nextenergynews.com/news1/next-energy-ne= ws-toshiba-micro-nuclear-12.17b.html

Kevin

From: Lancair Mailing List [mailto:lml@lancaironline.net] = On Behalf Of Brent Regan
Sent: Friday, January 25, = 2008 4:19 AM
To: = lml@lancaironline.net
Subject: [LML] Re: = Electric Powered Lancair - Long

Interesting analysis Jim. A quick calculation = of my IV-P's power system energy density (stored useful energy that will come = out the prop flange divided by the weight of the engine and the fuel) gives a = figure of 0.8 KwHr/Lb. This compares to the current (npi) technology = of 0.044 KwHr/Lb (battery,+motor+controller) giving a ratio of 18:1. It is = therefore true that having batteries with 10X the energy density would make them competitive with hydrocarbons BUT the battery article did not tell the = full story. The density improvement was in the silicone ANODE only. The cell now = becomes cathode limited and the true improvement in energy density at the cell = level is only 2:1. Not shabby, but a long way from 10:1.

Technology marches on and though it may be too soon to be scrapping the = old four banger, it's not too soon to dream.

Regards
Brent Regan

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