Re: Disaster, I think

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j...@oxaero.com

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Nov 18, 2011, 8:35:44 AM11/18/11

to Adam Woolley, Deturbulator Participants

Adam,

This is good news. I will pull the data from the LX5000 trace and modify the spreadsheet so that each airspeed can use a different sample rate (for skipping samples to use more of the time you held a speed), and send you the revised spreadsheet that you can use as a template for the future.

Jim

On Nov 17, 2011, at 11:57 PM, "Adam Woolley" <go_so...@hotmail.com> wrote:

Hello Jim,

Thankyou so much for taking this on. I was quite deflated after entering the data, since reading your reply e-mails it has lifted my spirits remarkably. I’m really working hard at getting every little performance advantage out of my Cirrus, as I see it – free points!

I’m using a Cambridge 25, though I will go out to the club now and download the LX5000 trace – maybe it’ll give better results, or at least confirm the original data? Please find attached *.xls spreadsheet with times, speeds and notes of the sector flown. My plumbing is set up as per the SH manuals, so should see your IAS calibration factor to be ample. I hope it helps and am looking forward to the results.

I'll arrange another 10,000’ tow soon, but after a complete analysis of this trace – to see if it’ll be worth while.

Best Regards,

Adam

From: j...@oxaero.com

Sent: Friday, November 18, 2011 1:01 PM

To: Adam Woolley

Subject: RE: [Standard Cirrus] Disaster, I think [2 Attachments]

Adam,

It looks like you used the GPS altitudes and, looking at them graphically, they appear to be much less reliable than the pressure altitudes, smoother but very wavy. So, the pressure altitudes are the ones to use. The pressure altitudes have a curious 0.083 Hz wave riding on the signal. What kind of logger are you using?

I will enter pressure altitudes and send the corrected spreadsheet back to you.

I noticed that you simply entered the same data for all three flights. That won’t work when you take your second set of data to be averaged in. Better to modify the averaging calculation to simply ignore the flights not yet taken. I’ll do that too.

My problem is that I do not know which speed runs are for what speeds. Attached is an altitude profile for the flight with the segments numbered. Please return a list of these numbers commented with the speed you were flying. In some cases, I may have given a single speed several sequential numbers.

Did you use a camcorder to capture your panel during the flight?

Best regards,

Jim

From: Standar...@yahoogroups.com [mailto:Standar...@yahoogroups.com] On Behalf Of Adam Woolley
Sent: Thursday, November 17, 2011 5:47 PM
To: Standar...@yahoogroups.com
Subject: [Standard Cirrus] Disaster, I think [2 Attachments]

[Attachment(s) from Adam Woolley included below]

Attached is my polar curve test flight for this morning & *.xls spreadsheet. Conditions smooth in 90% of the sky, irregular flight tracks due low cloud coming in unexpectedly below me. Took off at 5:10am to 10,000’.

Either I’ve got an awesome glider, or I need to do more research and try again. 80kts is AWESOME, just didn’t feel like it. 70kts seemed to feel better, but results doesn’t concur.

Pity it costs so much money...

Adam Woolley

AUSTRALIA

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Attachment(s) from Adam Woolley

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