I can confirm that the cylindrical lights supplied by Lancair will not fit on the new strut. The new strut is larger in diameter and the light sticks out below the gear door plane. I mounted them on the intake pipes on the engine thinking that the isolation of the hoses mounting the intake pipes plus another rubber isolation below the light itself might allow them to survive the vibration. We will see as the airplane should see first flight in a couple of months.

Jack Morgan

From: "F. Barry Knotts" <bknotts@buckeye-express.com>

Date: April 22, 2010 4:08:59 PM GMT-04:00

To: lml@lancaironline.net

Subject: Re: [LML] landing light 4P

When I purchased my IV-P it had the 2.2" cylindrical lights.  One on the nose wheel strut and one on the co-pilot side intake.  It also had 2 HID lights in the wingtips.  I've taken both cylindrical lights off.  Even for taxi I found them less than what I felt I needed.  But to answer your questions:

The mount on the strut was marginal.  It was mounted using the same hose clamps as the firewall closeout shield.  With the new style strut, I'm not sure where it would fit.  Mine fell off when the mounting screws that held the cylindrical case to the metal loop that the hose clamp passed through backed out due to vibration.  I was not aware of any interference with the nose gear or doors.  (No witness marks on the interior of the doors.)  Photo is attached.

The mount for the light in the intake port was very secure.  It was mounted on the alternator.  Not sure if that was wise, but it seemed to work well and did not require the wiring to flex with each take-off / landing cycle.  The lamp was mounted on a piece of phenolic which was mounted to ground studs on the alternator.  I had no cooling problems (related to that.)  You should have a port in the baffling in front of the #5 cylinder.  Photo attached.

I have replaced that light with a MicroSun LED landing light which I use as a taxi light.  It would be OK for a landing light, if I didn't already have the HIDs in the wingtips.  If you would like a photo of the MicroSun LED light, let me know.  The next time I am at the hangar, I will take one.

Barry Knotts
Lancair IV-P N4XE
Conti TSIO-550

bronnenmeier@GROBSYSTEMS.COMwrote:

Dear subscribers,

 

I had to remove my landing light from my lower cowl due to an interference with my baffling/cool air duct for the cabin.

 

I now bought the 2 halogen lights from Lancair.

 

Question: where do I mount them? I have seen 2 possibilities so far:

1. On the nose wheel strut – I recall seeing rub marks at least on one other 4P at the inside of nose gear door – obviously it is pretty tight there
2. In the air intake for cylinder cooling to the right side of the propeller. I made new baffling – it is really stiff – I wouldn’t have any concern mounting the lights to it – is there any known effect to the cooling?

 

Ideas and thoughts are appreciated

 

Ralf

 

One more thing off the subject: when I google my name on the internet I find tons of emails that I sent to the lml list because they went through some kind of virus scanner. Since I used to put my phone number and adress in my mails it just makes me feel a little uncomfortable knowing that everybody in the world can read my stupid questions to the lml list on the internet.

<Lamp in cooling port.jpg><Lamp on nose gear.jpg>