Return-Path: Received: from fed1mtao05.cox.net ([68.6.19.126] verified) by logan.com (CommuniGate Pro SMTP 4.2b1) with ESMTP id 3144027 for flyrotary@lancaironline.net; Sat, 03 Apr 2004 12:06:26 -0500 Received: from BigAl ([68.107.116.221]) by fed1mtao05.cox.net (InterMail vM.5.01.06.08 201-253-122-130-108-20031117) with ESMTP id <20040403170625.MYIL2451.fed1mtao05.cox.net@BigAl> for ; Sat, 3 Apr 2004 12:06:25 -0500 From: "Al Gietzen" To: "Rotary motors in aircraft" Subject: Percent Power, Throttle position Date: Sat, 3 Apr 2004 09:06:31 -0800 Message-ID: <000101c4199e$0296c920$6400a8c0@BigAl> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0002_01C4195A.F4738920" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 This is a multi-part message in MIME format. ------=_NextPart_000_0002_01C4195A.F4738920 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable I'm about to make a new throttle plate control arm, and rig the spring = for a default position somewhere between full open and full closed in the = event of a throttle disconnect. So the speculative question of the day is - what percent power would one like to maintain in the event of a loss of throttle control, and what butterfly position would roughly give that power? =20 Of course there is no one answer fits all - different airplane, = different engine, different TB, even different pilot. But let's just guess for a slippery airplane like a Velocity, with a 265hp NA 20B, and for a TB = throat dia of about 1-3/4" for each rotor. =20 Too ambiguous? Then I guess I'll have to wait until I fly to figure it = out. =20 Al =20 ------=_NextPart_000_0002_01C4195A.F4738920 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

I'm about to make a new throttle plate = control arm, and rig the spring for a default position somewhere between full open = and full closed in the event of a throttle disconnect.

So the speculative question of the day is - = what percent power would one like to maintain in the event of a loss of = throttle control, and what butterfly position would roughly give that = power?

Of course there is no one answer fits all - = different airplane, different engine, different TB, even different pilot. But let's = just guess for a slippery airplane like a Velocity, with a 265hp NA 20B, and for a TB = throat dia of about 1-3/4" for each rotor.

Too ambiguous? Then I guess I'll have = to wait until I fly to figure it out.

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