Butterfly vario

Hi,
I really like the look of the Butterfly vario, it ticks most of my
requirement boxes.
Where do most people fit their sensor box given the requirement to be 100mm
from data wires and metal, 150mm away from avionics, 300mm away from 2 amp
cables and 500mm from a speaker?
I realise gliders have different positions for wires and speakers but I
would like to know how others have positioned their box.
Regards,
Steve.

keskiviikko, 17. syyskuuta 2014 10.57.59 UTC+3 Steve Parker kirjoitti:
Hi,

I really like the look of the Butterfly vario, it ticks most of my

requirement boxes.

Where do most people fit their sensor box given the requirement to be 100mm

from data wires and metal, 150mm away from avionics, 300mm away from 2 amp

cables and 500mm from a speaker?

I realise gliders have different positions for wires and speakers but I

would like to know how others have positioned their box.

Regards,

Steve.


Mine is in the rear fuselage, roughly in line with wing trailing edge, over structure that reinforces rear fuselage-wing pins.

Routing CAN cable and pressure lines there from instrument panel was quite a job but it ISU works flawlessly. I also changed radio and variometer speakers to ones with magnet-shielded driver (you would be amazed how much better your radio and variometer sound with proper driver/speaker instead of those made with chinese 5c parts).

If you have a smartphone, you can download app that basically detects metal structure inside walls and floors using the magnetic sensor of the phone. I used this same sensor to map out sources of biggest magnetic disturbances inside fuselage.

krasw

On Wednesday, September 17, 2014 12:57:59 AM UTC-7, Steve Parker wrote:
Hi,

I really like the look of the Butterfly vario, it ticks most of my

requirement boxes.

Where do most people fit their sensor box given the requirement to be 100mm

from data wires and metal, 150mm away from avionics, 300mm away from 2 amp

cables and 500mm from a speaker?

I realise gliders have different positions for wires and speakers but I

would like to know how others have positioned their box.

Regards,

Steve.

I mounted mine under the glare shield in the panel, as far from the other instruments as possible. I also redid the power/grounds to the other instruments, twisting the current carrying pairs and routing away from the ISU as much as possible. My large speakers are behind my head, but I left the small one in the spare Illec vario about 8" away from the ISU. I did not achieve all of the installation requirements to the letter, but after the install I tried moving power lines, metal bits, and magnets closer and further from the ISU in different directions while observing the heading (magnetically derived). From that experiment I surmise that the installation instructions are conservative. In theory you can compensate out static interference sources (like metal, constant DC currents, etc) but cannot comp changing sources (varying DC currents, rotating magnetic compass cards, etc.).

My installation has worked very well, with no problems due to location or interference.

On Wednesday, September 17, 2014 12:57:59 AM UTC-7, Steve Parker wrote:
Hi,

I really like the look of the Butterfly vario, it ticks most of my

requirement boxes.

Where do most people fit their sensor box given the requirement to be 100mm

from data wires and metal, 150mm away from avionics, 300mm away from 2 amp

cables and 500mm from a speaker?

I realise gliders have different positions for wires and speakers but I

would like to know how others have positioned their box.

Regards,

Steve.

Steve,

I have mine mounted on a bracket forward of my instrument panel Ventus b, all my speakers are behind my seat. I have flown for two years with the vario and it works well.

I sell the Butterfly Vario and have them in stock.

Richard
www.craggyaero.com

Routing CAN cable and pressure lines there from instrument panel was quite a job but it ISU works flawlessly. I also changed radio and variometer speakers to ones with magnet-shielded driver (you would be amazed how much better your radio and variometer sound with proper driver/speaker instead of those made with chinese 5c parts).

krasw

Please provide make and model numbers of the magnet-shielded speakers you used with your Butterly vario.

I installed the butterfly system in a Ventus2B. The sensors were installed in front of the wind dam wall located in front of the rudder pedals. While I was at the job the wind wall was made more wind proof. Of course the wind wall must be removed for this application, a shelf or bracket installed and the wall reinstalled. I have been extremely pleased with the butterfly performance. Yes I'd go through all the trouble again, it's that good

Le mercredi 17 septembre 2014 03:57:59 UTC-4, Steve Parker a écrit*:
Hi,

I really like the look of the Butterfly vario, it ticks most of my

requirement boxes.

Where do most people fit their sensor box given the requirement to be 100mm

from data wires and metal, 150mm away from avionics, 300mm away from 2 amp

cables and 500mm from a speaker?



I realise gliders have different positions for wires and speakers but I

would like to know how others have positioned their box.

Regards,

Steve.

Hi
I know this is off topic!
I am considering buying the BF. Anyone care to give is opinion on the vario in this instrument.
Regards
Gilles

On Wednesday, 17 September 2014 23:01:31 UTC+3, wrote:
Routing CAN cable and pressure lines there from instrument panel was quite a job but it ISU works flawlessly. I also changed radio and variometer speakers to ones with magnet-shielded driver (you would be amazed how much better your radio and variometer sound with proper driver/speaker instead of those made with chinese 5c parts).



krasw



Please provide make and model numbers of the magnet-shielded speakers you used with your Butterly vario.

The speaker driver is Tangband W2-800SJ, installed in palm-size plastic box from local DIY-electronics store. I just drilled lots of holes to the cover of the box and pop-riveted the driver flush on the back side of it. I soldered a shielded pair cable to driver and routed it straight to BF wiring connector. I did similar speaker for the radio. My variometer speaker is over my left shoulder, and radio speaker over my right shoulder, behind my back. It's important to put the speaker close to your ears, and not bury it inside instrument panel or behind back rest.

On Thursday, September 18, 2014 6:28:40 AM UTC-7, krasw wrote:
On Wednesday, 17 September 2014 23:01:31 UTC+3, wrote:

Routing CAN cable and pressure lines there from instrument panel was quite a job but it ISU works flawlessly. I also changed radio and variometer speakers to ones with magnet-shielded driver (you would be amazed how much better your radio and variometer sound with proper driver/speaker instead of those made with chinese 5c parts).







krasw







Please provide make and model numbers of the magnet-shielded speakers you used with your Butterly vario.



The speaker driver is Tangband W2-800SJ, installed in palm-size plastic box from local DIY-electronics store. I just drilled lots of holes to the cover of the box and pop-riveted the driver flush on the back side of it. I soldered a shielded pair cable to driver and routed it straight to BF wiring connector. I did similar speaker for the radio. My variometer speaker is over my left shoulder, and radio speaker over my right shoulder, behind my back. It's important to put the speaker close to your ears, and not bury it inside instrument panel or behind back rest.

Be careful about the speakers connected. I believe the Butterfly varios are supplied with 8 ohm speakers and the Tangband is a 4 Ohm speaker.

The short of it do not connect a 4 Ohm speaker to an 8 Ohm amplifier.

What are ohms, anyway?
Short answer: The ohm is the unit of measure for impedance, which is the property of a speaker that restricts the flow of electrical current through it. Typical speakers have impedance ratings of 4 ohms, 8 ohms or 16 ohms. The impedance of a speaker is a physical property that (ideally) does not change value, although from an engineering standpoint, there are many complex characteristics that make up speaker impedance For this reason, the rating of a speaker is called its 'nominal' value, which pretty much means "in name only". For the average audio user, the nominal impedance is the dominant characteristic and for the purposes of this discussion, we will use the nominal value of the speaker's impedance.

Why are ohms important?
Two reasons:
(1) If you connect your amplifier to the wrong speaker impedance, you risk damaging the amp. In solid state amps, if the speaker impedance is too low, the amplifier will tend to overheat and more power is used up in the amplifier than is delivered to the speaker. Too many speakers on a solid state amp can burn up the power output section.
(2) The amplifier will deliver maximum power (volume) to the speaker when the speaker impedance matches (is equal to) the internal impedance (called the OUTPUT IMPEDANCE) of the amplifier. Too low an impedance will result in weak output and poor tone. If the speaker impedance is higher than that of the amplifier, its power output will again be less than it is capable of.

Understanding Ohms and Impedance:
In order to understand the reasons for the rules for speaker connection, we need a bit of electrical theory. You probably had this as a lesson in high school at some point, but were more interested in other things at the time.. In order to relate it to something you are more familiar with, let's consider the ordinary garden hose. Print this off and go outside, hook up the hose (no nozzle) and turn on the water. Pretty soon, water should start flowing out the end of the hose. This flow of water through the hose is similar to electric current, which is usually described as the flow of electrons through the wire and is measured in Amperes.

Now put your thumb over the end of the hose and try to stop the flow of water. Feel the pressure? This pressure is similar to Voltage. It is the force of electricity that pushes the electrons through the wire. Notice that if you succeed in plugging the water flow, (no current) the pressure is still there. This is like an amplifier with no speakers attached, or an AC outlet with nothing plugged in. Voltage is present, but there is no current flow.

Finally, move your thumb a bit to allow some water to spray. By varying the position of your thumb, you can control how much water comes out of the hose. Your thumb is restricting the flow of water. In an electrical circuit, things that restrict or control the flow of current are said to impede current flow, and are described as having impedance. In a hose, we use a nozzle to restrict the flow. In an electrical circuit, the device that uses electrical energy and has impedance is called the LOAD.

It should be apparent by now that there is a relationship between pressure (voltage), flow (current) and restriction (impedance). Since voltage or pressure is what moves the current, increasing the voltage pressure should increase the current, assuming the impedance doesn't change. Decreasing the voltage should decrease the current. On the other hand, increasing the impedance restricting the flow of current will cause the current to decrease, like turning the nozzle toward OFF. Lowering the impedance is like opening the nozzle to allow more flow. This relationship was analyzed by a fellow by the name of George Simon Ohm a long time ago, and he identified a simple formula that is extremely important in electricity and electronics which bears his name: Ohm's Law.

Richard
www.craggyaero.com

On Wednesday, September 17, 2014 5:51:31 PM UTC-7, s6 wrote:
Le mercredi 17 septembre 2014 03:57:59 UTC-4, Steve Parker a écrit*:

Hi,



I really like the look of the Butterfly vario, it ticks most of my



requirement boxes.



Where do most people fit their sensor box given the requirement to be 100mm



from data wires and metal, 150mm away from avionics, 300mm away from 2 amp



cables and 500mm from a speaker?







I realise gliders have different positions for wires and speakers but I



would like to know how others have positioned their box.



Regards,



Steve.



Hi

I know this is off topic!

I am considering buying the BF. Anyone care to give is opinion on the vario in this instrument.

Regards

Gilles

Opinion on the Butterfly:

I have now flown with it for two seasons. I like it. It is expensive, but I think the best of the current generation. The display is extremely well done and the user interface intuitive and quick to operate.

The inertially derived Vertical Airmass Movement and instantaneous wind give you a better picture of what the air around the glider is doing, rather than the long term averages other instruments give you.

I have not seen the newest generation LX products, but in my opinion the Butterfly (now Air Avionics) is some distance ahead of the ClearNav in features, and two generations or more ahead in user interface.

The companion iGlide product is also at least a decade ahead of any competing product in user interface. It has been held back by the small iPhone display, but this has recently changed.