RE: [Paparazzi-devel] Mounting horizontal IR below the fuse?

[gisela.noci]

We also fly a 40 size trainer with a .55 glo engine. With the sensor mounted
on a pylon on the 'windscreen', 5cm above the engine, it failed to work,; to
much IR signature from the engine and wanted to pitch up....

I have now mounted below the fus, below CofG more or less, and it works
perfectly. We fly in the desert mostly here in Namibia, so have spring steel
landing gear with about 70mm wheelbase width and 80mm fat foam wheels to
land and takeoff on sand/gravel. Works very well, BUT... have destroyed 2
sensor already from stones flung up by the prop hitting the IR window.
Moving the sensor rearwards would help a little, since the stones velocity
may reduce a little by then, but only a little.. Not the best solution
under, unfortunately. We are a 60 size trainer now, with 75 engine, and I
have fitted my sensors ( I made my own sensors, each separate,ie, one for Z
and one each for pitch and roll) as follows - Pitch at left wing tip, roll
on top of fus, just rear of wing trailing edge, Z facing up/down, thru fus,
just rear of roll sensor. This works great, no oil on windows, no stones, no
fuss!

Have fun

Joe

-----Original Message-----
From: address@hidden
[mailto:address@hidden
] On Behalf Of David Carlson
Sent: Monday, November 02, 2009 12:00 PM
To: address@hidden
Subject: Re: [Paparazzi-devel] Mounting horizontal IR below the fuse?

Also have had success with this configuration.  The only problem I see 
is for belly-landers, which should be obvious.

To secure them, I generally take a piece of shrink-wrap just big enough 
to wrap around the  two sides without the picoblade connector, making 
sure to not obstruct the thermopile's window.  Then I use hot glue 
between the shrink-wrap and the (foam) airframe.  Works really well.

Buzz

Maik Höpfel wrote:
> Hello Adrian,
>
> we flew a small Graupner Elektro Trainer S like this, worked just as well.
>
> Regards,
> Maik
>
> 2009/11/2 Adrian Lauf <address@hidden>:
>   
>> Hello all,
>> Me again, hopefully I won't be pestering all of you too much longer with
>> inane novice questions - thanks to all those who have been a tremendous
>> help, couldn't have done this without you. My (hopefully) final question
>> before I get into the air is how to best mount the horizontal IR board. I
am
>> flying with a large glow-powered plane, the Hangar 9 Alpha 40. It is a
>> high-wing design, and has a front-mounted engine. The wing itself is
quite
>> large. The engine exhausts near the top, so because of heat interference
and
>> oil spew concerns, I was considering mounting the IR board *underneath*
the
>> fuse. From a directional standpoint, there should be nothing wrong with
>> this, correct? The tricycle gear would give *plenty* of ground clearance,
as
>> I fly with belly-mounted cameras all the time. I think this would also
>> somewhat solve the problem of the large wingspan interfering with the
field
>> of view, were I to mount it on top. Is there anything inherently wrong
with
>> doing so, before I drill into the underside of the fuse? Also, what are
>> people using to secure the board? It's the new IR board design, purchased
>> from Chebuzz. Thanks!
>> -Adrian
>> _______________________________________________
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>>
>>
>>     
>
>
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