X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Sat, 29 Sep 2007 11:21:26 -0400 Message-ID: X-Original-Return-Path: Received: from mail.skywerx.com ([206.123.212.134] verified) by logan.com (CommuniGate Pro SMTP 5.1.12) with ESMTPS id 2358876 for lml@lancaironline.net; Sat, 29 Sep 2007 07:43:48 -0400 Received-SPF: none receiver=logan.com; client-ip=206.123.212.134; envelope-from=aflyer@lazy8.net Received: from [192.168.0.102] ([10.10.0.124]) by mail.skywerx.com (8.12.8/8.12.8) with ESMTP id l8TBUrCg027186 for ; Sat, 29 Sep 2007 05:30:54 -0600 X-Original-Message-ID: <46FE3A28.9080903@lazy8.net> X-Original-Date: Sat, 29 Sep 2007 05:42:32 -0600 From: John Huft User-Agent: Thunderbird 2.0.0.6 (Windows/20070728) MIME-Version: 1.0 X-Original-To: Lancair Mailing List Subject: Re: [LML] Re: static thrust experience? References: In-Reply-To: Content-Type: multipart/alternative; boundary="------------020204000301040605070009" This is a multi-part message in MIME format. --------------020204000301040605070009 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit We once did this with Cessna 180s and 185s (O-470s, IO-520s, IO-550s with 82" 2-blades to 88" 3-blades) and got results from 800 to 1200 lbs. Used a hydraulic "fish scale" tied off to the bumper hitch on a pickup. The longer props pull better as far as static thrust. We are more interested in take-off performance with those birds, short strips, floats, etc. We finally decided there was no correlation between static thrust and cruise efficiency. John RV spy Sky2high@aol.com wrote: > In a message dated 9/28/2007 2:31:35 P.M. Central Daylight Time, > troneill@charter.net writes: > > Has anyone tethered and measured the maximum static thrust of > their prop ... and what kind of prop? > > > Terrence, > > Nope, but you can tie your tail to mine anytime and we can see who > wins the tractor pull. > > Grayhawk > a mere 320 > > > > > > ------------------------------------------------------------------------ > See what's new at AOL.com > and Make AOL Your > Homepage . --------------020204000301040605070009 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit We once did this with Cessna 180s and 185s (O-470s, IO-520s, IO-550s with 82" 2-blades to 88" 3-blades) and got results from 800 to 1200 lbs. Used a hydraulic "fish scale" tied off to the bumper hitch on a pickup.

The longer props pull better as far as static thrust. We are more interested in take-off performance with those birds, short strips, floats, etc. We finally decided there was no correlation between static thrust and cruise efficiency.

John
RV spy



Sky2high@aol.com wrote:
In a message dated 9/28/2007 2:31:35 P.M. Central Daylight Time, troneill@charter.net writes:
Has anyone tethered and measured the maximum static thrust of their prop ... and what kind of prop?
 
Terrence,
 
Nope, but you can tie your tail to mine anytime and we can see who wins the tractor pull.
 
Grayhawk
a mere 320
 
 



See what's new at AOL.com and Make AOL Your Homepage.
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