IV-P Landing/Taxi Light Location

Submitted by Anonymous on

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From: Jay Phillips <jayph [at] fastairplane.net>
Sender: <marv [at] lancaironline.net>
Subject: IV-P Landing/Taxi Light Location
Date: Mon, 10 Mar 2014 07:31:25 -0400
To: <lml [at] lancaironline.net>

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

 

Since I’ve owned the aircraft (2011) it’s been a challenge to manage the engine cooling during climb. My home field is at 5100’. I climb at 165 KIAS. By 13,000’ 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’s 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’ 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’t 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

 

IV-P Landing/Taxi Light Location

Submitted by Anonymous on

From: Colyn Case <colyncase [at] earthlink.net>
Subject: Re: [LML] IV-P Landing/Taxi Light Location
Date: Mon, 10 Mar 2014 08:55:20 -0400
To: Lancair Mailing List <lml [at] lancaironline.net>
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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’ve owned the aircraft (2011) it’s been a challenge to manage the engine cooling during climb. My home field is at 5100’. I climb at 165 KIAS. By 13,000’ 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’s 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’ 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’t 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

 

IV-P Landing/Taxi Light Location

Submitted by Anonymous on

From: Todd Long <toddlong1 [at] gmail.com>
Sender: <marv [at] lancaironline.net>
Subject: Re: [LML] IV-P Landing/Taxi Light Location
Date: Mon, 10 Mar 2014 10:57:01 -0400
To: <lml [at] lancaironline.net>
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Undecoded Message
What kind of landing light? I have a nice bright led in my right cowl and no overheat problems. 

Sent from my iPad

On Mar 10, 2014, at 6:31, "Jay Phillips" <jayph [at] fastairplane.net

> wrote:

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

 

Since I’ve owned the aircraft (2011) it’s been a challenge to manage the engine cooling during climb. My home field is at 5100’. I climb at 165 KIAS. By 13,000’ 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’s 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’ 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’t 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

 

IV-P Landing/Taxi Light Location

Submitted by Anonymous on

From: Dennis Ramsey <doramsey [at] gmail.com>
Sender: <marv [at] lancaironline.net>
Subject: IV-P Landing/Taxi Light Location
Date: Mon, 10 Mar 2014 10:57:10 -0400
To: <lml [at] lancaironline.net>
Message Header


Undecoded Message
I have AeroLED Microsun landing light mounted to my nose gear.  Very small footprint with 1800+ lumens on 30W of power.  The one in the current catalog looks slightly longer than mine.  Also they dont advertise it but you can order them without the heat sink if the application in the wind.  I dont have any clearance issues with the units with no heat sink. 


And FWIW, I also put one in the right cowl inlet.   Testing showed that it obstructed flow enough to lower my manifold pressure 0.2-0.3 inches (I am a normally aspirated IV) and I could see it in engine temps as well, but I dont have an issue with high engine temps- normal cruise around 300 degrees.