Senior Project, recording equipment, and economic stimulus.

On May 24, 12:36 am, Marc Ramsey wrote:
Eric Greenwell wrote:
Henryk Birecki wrote:
Eric Greenwell wrote:

Henryk Birecki wrote:
Cambridge CAI302 provides output of
true speed, but no temperature data (?).
The 302 will output outside air temperature.

In a fashion. It outputs it as some raw number in LOG 12 mode, but
unless you know all the calibration data, this mode does not do much
good.

Well, darn it, I was hoping for some easy way to display it on my PDA. I
can look at it on the 302 itself, but it's 10 button presses and 5 knob
clicks to get to it. A real nuisance.

The other thing the 302 fails to output in normal operating mode is
indicated airspeed (it provides only true airspeed), which one would
definitely want for flight test evaluation purposes...

Marc

true, but if we have TAS, outside air temp, and altitude, its a pretty
easy conversion, right?

wrote:
On May 24, 12:36 am, Marc Ramsey wrote:
Eric Greenwell wrote:
Henryk Birecki wrote:
Eric Greenwell wrote:
Henryk Birecki wrote:
Cambridge CAI302 provides output of
true speed, but no temperature data (?).
The 302 will output outside air temperature.
In a fashion. It outputs it as some raw number in LOG 12 mode, but
unless you know all the calibration data, this mode does not do much
good.
Well, darn it, I was hoping for some easy way to display it on my PDA. I
can look at it on the 302 itself, but it's 10 button presses and 5 knob
clicks to get to it. A real nuisance.
The other thing the 302 fails to output in normal operating mode is
indicated airspeed (it provides only true airspeed), which one would
definitely want for flight test evaluation purposes...

Marc

true, but if we have TAS, outside air temp, and altitude, its a pretty
easy conversion, right?

Unfortunately, the 302 does not output outside air temperature in normal
operating (LOG 0) mode. Operating in LOG 12 mode will require a fairly
sizable post-processing effort to perform the necessary conversions from
raw sensor data to usable results. If you want to go this route,
contact me via email, I have some code that will help...

Marc

On May 24, 12:42 pm, Marc Ramsey wrote:
wrote:
On May 24, 12:36 am, Marc Ramsey wrote:
Eric Greenwell wrote:
Henryk Birecki wrote:
Eric Greenwell wrote:
Henryk Birecki wrote:
Cambridge CAI302 provides output of
true speed, but no temperature data (?).
The 302 will output outside air temperature.
In a fashion. It outputs it as some raw number in LOG 12 mode, but
unless you know all the calibration data, this mode does not do much
good.
Well, darn it, I was hoping for some easy way to display it on my PDA. I
can look at it on the 302 itself, but it's 10 button presses and 5 knob
clicks to get to it. A real nuisance.
The other thing the 302 fails to output in normal operating mode is
indicated airspeed (it provides only true airspeed), which one would
definitely want for flight test evaluation purposes...

Marc

true, but if we have TAS, outside air temp, and altitude, its a pretty
easy conversion, right?

Unfortunately, the 302 does not output outside air temperature in normal
operating (LOG 0) mode. Operating in LOG 12 mode will require a fairly
sizable post-processing effort to perform the necessary conversions from
raw sensor data to usable results. If you want to go this route,
contact me via email, I have some code that will help...

Marc

ok marc, i understand now. I still ahvent decided on what the best
route is for the data gathering. How much do the 302's typically
run? I glanced over their website and it seemed to me that the bare
logger wasnt too spendy, but then if you wanted to add on a vario
display, etc etc. it could get pretty pricey. what all would I really
need? just the bare logger?

On May 24, 11:36 am, wrote:
On May 24, 12:42 pm, Marc Ramsey wrote:



wrote:
On May 24, 12:36 am, Marc Ramsey wrote:
Eric Greenwell wrote:
Henryk Birecki wrote:
Eric Greenwell wrote:
Henryk Birecki wrote:
Cambridge CAI302 provides output of
true speed, but no temperature data (?).
The 302 will output outside air temperature.
In a fashion. It outputs it as some raw number in LOG 12 mode, but
unless you know all the calibration data, this mode does not do much
good.
Well, darn it, I was hoping for some easy way to display it on my PDA. I
can look at it on the 302 itself, but it's 10 button presses and 5 knob
clicks to get to it. A real nuisance.
The other thing the 302 fails to output in normal operating mode is
indicated airspeed (it provides only true airspeed), which one would
definitely want for flight test evaluation purposes...

Marc

true, but if we have TAS, outside air temp, and altitude, its a pretty
easy conversion, right?

Unfortunately, the 302 does not output outside air temperature in normal
operating (LOG 0) mode. Operating in LOG 12 mode will require a fairly
sizable post-processing effort to perform the necessary conversions from
raw sensor data to usable results. If you want to go this route,
contact me via email, I have some code that will help...

Marc

ok marc, i understand now. I still ahvent decided on what the best
route is for the data gathering. How much do the 302's typically
run? I glanced over their website and it seemed to me that the bare
logger wasnt too spendy, but then if you wanted to add on a vario
display, etc etc. it could get pretty pricey. what all would I really
need? just the bare logger?

The bare logger (302A) is just a GPS logger with altitude transducer,
no airspeed info etc. You need a real 302. ~$2,400.

Darryl

The bare logger (302A) is just a GPS logger with altitude transducer,
no airspeed info etc. You need a real 302. ~$2,400.

Darryl

well that takes care of that idea then

wrote:
ok marc, i understand now. I still ahvent decided on what the best
route is for the data gathering. How much do the 302's typically
run? I glanced over their website and it seemed to me that the bare
logger wasnt too spendy, but then if you wanted to add on a vario
display, etc etc. it could get pretty pricey. what all would I really
need? just the bare logger?

You'll need a Cambridge 302 (not the 302A, which is a flight recorder
that doesn't measure airspeed or temperature). If you have a suitable
PDA and software, you don't need the 303. So, minimally, the new cost
is just under $2800. I've seen used ones in the $2000 range.

If you aren't so worried about the flight recorder, you might be able to
pick up a used Borgelt B50 in the $500 range. These output IAS, TAS,
vario, and outside air temperature to a PDA, plus they are really nice
varios...

Marc

On May 24, 1:55 pm, Marc Ramsey wrote:
wrote:
ok marc, i understand now. I still ahvent decided on what the best
route is for the data gathering. How much do the 302's typically
run? I glanced over their website and it seemed to me that the bare
logger wasnt too spendy, but then if you wanted to add on a vario
display, etc etc. it could get pretty pricey. what all would I really
need? just the bare logger?

You'll need a Cambridge 302 (not the 302A, which is a flight recorder
that doesn't measure airspeed or temperature). If you have a suitable
PDA and software, you don't need the 303. So, minimally, the new cost
is just under $2800. I've seen used ones in the $2000 range.

If you aren't so worried about the flight recorder, you might be able to
pick up a used Borgelt B50 in the $500 range. These output IAS, TAS,
vario, and outside air temperature to a PDA, plus they are really nice
varios...

Marc

marc,

im liking that idea. i want an audio vario bad and have been lusting
after the B40 or 50 for a while. It would potentially leave enough
cash in reserves to find a cheap logger too. will have to investigate
it further.