Message

Return-Path: Received: from ms-smtp-02.southeast.rr.com ([24.93.67.83] verified) by logan.com (CommuniGate Pro SMTP 4.1) with ESMTP id 2511865 for flyrotary@lancaironline.net; Tue, 05 Aug 2003 08:05:29 -0400 Received: from o7y6b5 (clt78-221.carolina.rr.com [24.93.78.221]) by ms-smtp-02.southeast.rr.com (8.12.5/8.12.2) with SMTP id h75C2Amo010426 for ; Tue, 5 Aug 2003 08:02:11 -0400 (EDT) Message-ID: <001701c35b4b$0aa70a60$1702a8c0@WorkGroup> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: tiny tach works, and my plane is a pig Date: Tue, 5 Aug 2003 08:13:55 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0014_01C35B29.835246E0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 This is a multi-part message in MIME format. ------=_NextPart_000_0014_01C35B29.835246E0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MessageRusty, Before you go adding weight to the tail - my RV's forward CG (empty) = was 1/8" forward of Van's Limit (in addition to weighing 1170 lbs). I = called Vans to check on the C.G. limit and as long as it was the = "forward" limit there was no concern. They fretted more over my weight = than the C.G. Depending on how much forward of the limit your C.G. point is, you = may want to make the first flight before adding more weight. Before I = painted my aircraft, the only time I noticed any effect from the foward = C.G. was when using full flaps with tanks almost dry. I would sometimes = run out of nose up trim at slow airspeeds. Once I painted the aircraft, = the weight of the paint on the tail apparently more than compensated and = I found I had full trim authority back at slow airspeeds. The only other possible down side is your horz stab will need to = produce more down force to keep the nose up and therefore produce a bit = more drag. My fastest straight and level airspeeds have been on way to = Sun & Fun when I have the plane loaded to the gills which moves the C.G. = further back, off-loading the horizonal stabilizer. On aircraft that do = not have the elevator control authority of an RV, you could encounter = lack of sufficient elevator control to bring the nose up for = sufficiently for a flair on landing. However, I've never had any = problem with that and doubt any RV would. FWIW Ed Anderson ----- Original Message -----=20 From: Russell Duffy=20 To: Rotary motors in aircraft=20 Sent: Monday, August 04, 2003 8:48 PM Subject: [FlyRotary] Re: tiny tach works, and my plane is a pig Ed's right I was amazed at how easy it is to foul plugs when the = mixture is too rich! If the plugs look really carbon black, then change = them out. They were pretty black alright, so we'll see. These were the plugs = that were used in the original run, so they've consumed a goodly amount = of assembly goo. =20 I managed to lose 22 pounds of weight today. I forgot to subtract the = weight of the arms that sit on the scales. Unfortunately, I'm still a = wee bit forward of the forward CG limit, so there's probably some = ballast required for the tail. What was that... I think I just heard = Tracy screaming :-) Rusty (worlds heaviest RV-3) ------=_NextPart_000_0014_01C35B29.835246E0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message

Rusty,

Before you go adding = weight to=20 the tail - my RV's forward CG (empty) was 1/8" forward of Van's Limit = (in=20 addition to weighing 1170 lbs). I called Vans to check on the C.G. = limit=20 and as long as it was the "forward" limit there was no concern. = They=20 fretted more over my weight than the C.G.

Depending on how = much forward of=20 the limit your C.G. point is, you may want to make the first flight = before=20 adding more weight. Before I painted my aircraft, the only time I = noticed=20 any effect from the foward C.G. was when using full flaps with tanks = almost=20 dry. I would sometimes run out of nose up trim at slow = airspeeds. =20 Once I painted the aircraft, the weight of the paint on the tail = apparently=20 more than compensated and I found I had full trim authority back at slow = airspeeds.

The only other possible = down side is=20 your horz stab will need to produce more down force to keep the nose up = and=20 therefore produce a bit more drag. My fastest straight and level = airspeeds=20 have been on way to Sun & Fun when I have the plane loaded to the = gills=20 which moves the C.G. further back, off-loading the horizonal = stabilizer. =20 On aircraft that do not have the elevator control authority of an RV, = you could=20 encounter lack of sufficient elevator control to bring the nose up for=20 sufficiently for a flair on landing. However, I've never had = any=20 problem with that and doubt any RV would.

FWIW

Ed Anderson

----- Original Message -----
From:=20 Russell=20 Duffy
To: Rotary motors in = aircraft

Sent: Monday, August 04, 2003 = 8:48=20 PM

Subject: [FlyRotary] Re: tiny = tach works,=20 and my plane is a pig

Ed's=20 right I was=20 amazed at how easy it is to foul plugs when the mixture is too = rich! If=20 the plugs look really carbon black, then change them=20 out.

They were = pretty black=20 alright, so we'll see. These were the plugs that were used in = the=20 original run, so they've consumed a goodly amount of assembly=20 goo.

I managed = to lose 22=20 pounds of weight today.  I forgot to subtract = the weight of the=20 arms that sit on the scales. Unfortunately, I'm still a wee = bit forward of the forward CG limit, so there's probably some = ballast=20 required for the tail.  What was that... I think I just = heard Tracy=20 screaming :-)

Rusty = (worlds heaviest=20 = RV-3)
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