X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from elasmtp-masked.atl.sa.earthlink.net ([209.86.89.68] verified) by logan.com (CommuniGate Pro SMTP 6.0.8) with ESMTP id 6768055 for lml@lancaironline.net; Mon, 10 Mar 2014 08:56:00 -0400 Received-SPF: none receiver=logan.com; client-ip=209.86.89.68; envelope-from=colyncase@earthlink.net DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=dk20050327; d=earthlink.net; b=OBNOemlv83T4FVWoiqx+JDPxjighnbdyPy0IxUJL1AvkuZhRtabQ9vTlhLvB8jUn; h=Received:From:Mime-Version:Content-Type:Subject:Date:In-Reply-To:To:References:Message-Id:X-Mailer:X-ELNK-Trace:X-Originating-IP; Received: from [72.73.84.133] (helo=[192.168.1.24]) by elasmtp-masked.atl.sa.earthlink.net with esmtpa (Exim 4.67) (envelope-from ) id 1WMzjp-0004cC-Hc for lml@lancaironline.net; Mon, 10 Mar 2014 08:55:26 -0400 From: Colyn Case Mime-Version: 1.0 (Apple Message framework v1085) Content-Type: multipart/alternative; boundary=Apple-Mail-58--462906918 Subject: Re: [LML] IV-P Landing/Taxi Light Location Date: Mon, 10 Mar 2014 08:55:20 -0400 In-Reply-To: To: "Lancair Mailing List" References: Message-Id: X-Mailer: Apple Mail (2.1085) X-ELNK-Trace: 63d5d3452847f8b1d6dd28457998182d7e972de0d01da940008a2c863833702f4a8eb8fecd0dc9ff350badd9bab72f9c350badd9bab72f9c350badd9bab72f9c X-Originating-IP: 72.73.84.133 --Apple-Mail-58--462906918 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=windows-1252 Short story: There's not enough clearance between the strut and the gear door to get = a decent size light. I have two 100 watt MR-12's mounted off center on = the strut. It's been a lot of work yet it's hard to get the perfect beam = pattern with such a small reflector. (mind you I'm picky....) The same is true of wing mount locations on the IVP. I have HID's in = the tips but they have a very narrow beam vertically and it's hard to = get the lens to not interfere with it. If I had it to do over again, I would cut the lower cowl and put a big = ass light in there. Colyn On Mar 10, 2014, at 7:31 AM, Jay Phillips wrote: My IV-P has the landing/taxi light located in the right-hand cowling = inlet. =20 Since I=92ve owned the aircraft (2011) it=92s been a challenge to manage = the engine cooling during climb. My home field is at 5100=92. I climb at = 165 KIAS. By 13,000=92 or so my hottest CHT is 400 dF and I have to = reduce climb rate or level off for a few minutes to start the CHT=92s = back down. This situation occurs both winter and summer, although it is = worse on a hot day. =20 While training with Bob Jeffrey recently, he suggested I try removing = the landing light to see what effect that has on cooling. So I tried it = yesterday and, apparently, problem solved. After takeoff I climbed at = 165 KIAS all the way to 17,500=92 and my hottest CHT only got as high as = 392 dF. Indeed the CHTs had begun trending down. =20 So it seems that I need to find a new location to mount the landing/taxi = light. The obvious location, that doesn=92t involve cutting composite, = is the nose gear. Can anyone who has a IV-P with a light mounted there = provide guidance as to: type of light, mounting hardware, clearance = issues, and anything else I should be aware of? =20 Thanks, =20 Jay Phillips =20 --Apple-Mail-58--462906918 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=windows-1252 Short story:

There's not enough = clearance between the strut and the gear door to get a decent size = light. I have two 100 watt MR-12's mounted off center on the = strut. It's been a lot of work yet it's hard to get the perfect beam = pattern with such a small reflector. (mind you I'm = picky....)

The same is true of wing mount = locations on the IVP. I have HID's in the tips but they have a = very narrow beam vertically and it's hard to get the lens to not = interfere with it.

If I had it to do over = again, I would cut the lower cowl and put a big ass light in = there.

Colyn

On Mar 10, 2014, at 7:31 AM, Jay Phillips wrote:

My IV-P has the landing/taxi = light located in the right-hand cowling inlet.

Since I=92ve owned the = aircraft (2011) it=92s been a challenge to manage the engine cooling = during climb. My home field is at 5100=92. I climb at 165 KIAS. By = 13,000=92 or so my hottest CHT is 400 dF and I have to reduce climb rate = or level off for a few minutes to start the CHT=92s back down. This = situation occurs both winter and summer, although it is worse on a hot = day.

While training with = Bob Jeffrey recently, he suggested I try removing the landing light to = see what effect that has on cooling. So I tried it yesterday and, = apparently, problem solved. After takeoff I climbed at 165 KIAS all the = way to 17,500=92 and my hottest CHT only got as high as 392 dF. Indeed = the CHTs had begun trending down.

So it seems that I need to = find a new location to mount the landing/taxi light. The obvious = location, that doesn=92t involve cutting composite, is the nose gear. = Can anyone who has a IV-P with a light mounted there provide guidance as = to: type of light, mounting hardware, clearance issues, and anything = else I should be aware of?

Thanks,

Jay = Phillips