X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from imr-da03.mx.aol.com ([205.188.105.145] verified) by logan.com (CommuniGate Pro SMTP 5.3.4) with ESMTP id 4168283 for flyrotary@lancaironline.net; Tue, 16 Mar 2010 19:21:13 -0400 Received-SPF: pass receiver=logan.com; client-ip=205.188.105.145; envelope-from=Bktrub@aol.com Received: from imo-ma02.mx.aol.com (imo-ma02.mx.aol.com [64.12.78.137]) by imr-da03.mx.aol.com (8.14.1/8.14.1) with ESMTP id o2GNKZvd004155 for ; Tue, 16 Mar 2010 19:20:35 -0400 Received: from Bktrub@aol.com by imo-ma02.mx.aol.com (mail_out_v42.9.) id q.d8f.670357 (45277) for ; Tue, 16 Mar 2010 19:20:32 -0400 (EDT) Received: from magic-m21.mail.aol.com (magic-m21.mail.aol.com [172.20.22.194]) by cia-mc03.mx.aol.com (v127_r1.2) with ESMTP id MAILCIAMC037-b0dd4ba01240183; Tue, 16 Mar 2010 19:20:32 -0500 From: Bktrub@aol.com Message-ID: <8fcae.6eaaff9b.38d16c40@aol.com> Date: Tue, 16 Mar 2010 19:20:32 EDT Subject: weighty subject To: flyrotary@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="part1_8fcae.6eaaff9b.38d16c40_boundary" X-Mailer: 9.0 Security Edition for Windows sub 5377 X-AOL-ORIG-IP: 71.112.30.207 X-AOL-IP: 172.20.22.194 X-Spam-Flag:NO X-AOL-SENDER: Bktrub@aol.com --part1_8fcae.6eaaff9b.38d16c40_boundary Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Today was the day of judgement, the measure of my building prowness- no, not the first flight, but the weight and balance. My plane weighs 1091 lbs, weighed as it should be- no usable fuel, full oil and coolant. I for one would go with the aluminum housings if they cost me up to $1500 more than the cast iron ones. If they saved 70 lbs total, that would be around $21 for each pound saved, to get my plane down to a more svelte 1021 lbs. I'm sure I could probably get another 15 lbs off if I did some weight reduction on my Shertz beam front mount, along with other things. I also went a bit heavy on my engine mount- 1" dia x .049 thick tubes on some of the mount. I at least have confidence that my mount should hold up. The CGs all work out OK- design range is between 68.7 -77.7 inches aft of datum. Here is how it works out: Vans states that most RV-4s come in around 950 lbs. Gross recommended is 1500 lbs. Mine: Empty 66.2, wt.1021 lbs with 180 lb pilot, but no fuel-68.51, just a bit out of CG by .2 inches, total wt. 1271 with 180 lb pilot and full fuel 68.8, total wt. 1465- with 35 lbs baggage- cg-70.38 total 1500 If I want to take a passenger with full fuel and baggage, they'd better not weigh a thing, or I'll be flying over gross recommended weight. Brian Trubee --part1_8fcae.6eaaff9b.38d16c40_boundary Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

Today was the day of judgement, the measure of my building prow= ness-=20 no, not the first=20 flight, but the weight and balance. My plane weighs 1091 lbs,= =20 weighed as it should be- no usable fuel, full oil and coolant. I for= one=20 would go with the aluminum housings if they cost me up to $150= 0 more=20 than the cast iron ones.=20 If they saved 70 lbs total, that would be around $21 for each pound= saved,=20 to get my plane down to a more svelte 1021 lbs. I'm sure I could pro= bably=20 get another 15 lbs off if I did some weight=20 reduction on my Shertz beam front mount, along with other thi= ngs. I=20 also went a bit heavy on my engine mount- 1" dia x .049 thick tubes= on=20 some of the mount. I at least have confidence that my mount should= hold=20 up. The CGs all work out OK- design range is between 68.7 -77.7 inch= es aft=20 of datum. Here is how it works out:

Vans states that most RV-4s come in around 950 lbs. Gross recom= mended=20 is 1500 lbs.

Mine:

Empty 66.2, wt.1021 lbs

with 180 lb pilot, but no fuel-68.51, just a bit out of CG by= .2=20 inches, total wt. 1271

with 180 lb pilot and full fuel 68.8, total wt. 1465-

with 35 lbs baggage- cg-70.38 tot= al=20 1500

If I want to take a passenger with full fuel and baggage, they'= d=20 better not weigh a thing, or I'll be flying over gross recommended= weight.=20

Brian Trubee

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