Sporty's E6B density altitude disparity

Dallas wrote:
On Sun, 29 Apr 2007 19:50:42 GMT, ArtP wrote:

I entered them on my WingX E6B software on my Axim and got PA=995 and
DA=1925

Chart:
PA: 1000
DA: 2000

Tom L's Sporty's E6B:
PA: 998
DA: 1910

Dallas' Sporty's E6B:
PA: 985
DA: 1894

ArtP's WingX E6B:
PA: 995
DA: 1925

Excuse me, I need to take a couple of aspirin and lay down.


Why? The reality is that these small variations really don't matter
much anyway.

Matt

On Apr 29, 4:16 pm, Blanche wrote:
On Sun, 29 Apr 2007 17:59:35 GMT, Tom L. wrote:

I entered the same numbers in my Sporty's E6B and got
PA: 998
DA: 1910

Field Elev : 1165
Pressure Alt: 1000
Temp : 21 C

DSSCalc - DA = 1931
CoPilot 1931
Garmin GPS 1930

If you want me to dig out the software I wrote based on "Flight Theory
for Pilots", it's around here someplace...

Blanche, my flight planning software AirPlan comes up with 1931 as
well...

Dean

Blanche wrote in
:

On Sun, 29 Apr 2007 17:59:35 GMT, Tom L. wrote:

I entered the same numbers in my Sporty's E6B and got
PA: 998
DA: 1910

Field Elev : 1165
Pressure Alt: 1000
Temp : 21 C

DSSCalc - DA = 1931
CoPilot 1931
Garmin GPS 1930

If you want me to dig out the software I wrote based on "Flight Theory
for Pilots", it's around here someplace...


FWIW - My 13 year old Jeppesen TechStar for PA = 1000 and Temp = 21C also
gives DA of 1931'. Worked just fine on my instrument written.

--
Marty Shapiro
Silicon Rallye Inc.

(remove SPAMNOT to email me)

Hi,

ArtP, which version of WingX do you have? I just ran it on the latest
2.0.4.3 and WingX came up with PA=1000' and DA=1931'.

Interestingly with a dew point of 18C, WingX shows the DA going up to
2,213', that about a 300' difference not that much - would be interesting to
see how it affects the performance numbers though.

Keep well,

Hilton


"ArtP" wrote in message
...
On Sun, 29 Apr 2007 17:20:43 GMT, "Dallas"
wrote:
Here's a sample problem:
Field Elevation: 1165
Altimeter Setting: 30.10
Temperatu 21°C
___________________

I entered them on my WingX E6B software on my Axim and got PA=995 and
DA=1925

On Mon, 30 Apr 2007 03:39:14 GMT, "Hilton" wrote:

Hi,

ArtP, which version of WingX do you have? I just ran it on the latest
2.0.4.3 and WingX came up with PA=1000' and DA=1931'.

My mistake. I had field elevation at 1160. At 1165, I get PA=1000' and
DA=1932'. (2.0.4.3).

On Mon, 30 Apr 2007 16:23:19 GMT, ArtP
wrote:

On Mon, 30 Apr 2007 03:39:14 GMT, "Hilton" wrote:

Hi,

ArtP, which version of WingX do you have? I just ran it on the latest
2.0.4.3 and WingX came up with PA=1000' and DA=1931'.

My mistake. I had field elevation at 1160. At 1165, I get PA=1000' and
DA=1932'. (2.0.4.3).

And I can't type either. It should read: PA=1000' and DA=1931'.

On Sun, 29 Apr 2007 22:22:56 GMT, Tom L. wrote:

Feel free to use the picture if you decide to call Sporty's.

Here is the image I sent to Sporty's asking for an explanation:

http://img.photobucket.com/albums/v1...SportysE6B.jpg

--
Dallas

On Apr 29, 10:59 am, Tom L. wrote:
I entered the same numbers in my Sporty's E6B and got
PA: 998
DA: 1910

Which is about the same as on the chart.
Your reading of 2000 DA for 1000 PA is slightly off. You need at least
22 deg C for that.

- Tom

On Sun, 29 Apr 2007 17:20:43 GMT, "Dallas"



wrote:
My trusty Sporty's Electronic E6B does not agree with the Density Altitude
Chart. My instructor is at a loss to explain the difference. Can anybody
tell me what's going on?

Here's a sample problem:
Field Elevation: 1165
Altimeter Setting: 30.10
Temperatu 21°C
___________________

Using the standard chart:
http://pacificrimprinting.com/densalt.pdf

30.1 in. Hg Pressure Altitude Conversion Factor: -165
Pressure Altitude: 1000
Density Altitude: 2000
___________________

Sporty's E6B calculation:
Pressure Altitude: 985
Density Altitude: 1894

The Sporty's pressure altitude is off by -15 feet and the density altitude
is off by -106 feet. I can't imagine Sporty's marketing a flawed
E6B, which one is inaccurate?- Hide quoted text -

- Show quoted text -

I got exactly the same...

Jay Beckman
PP-ASEL Lurking
Chandler, AZ

On 30 Apr 2007 14:44:24 -0700, Jay B wrote:

I got exactly the same...

I assume you got the same as mine?

As I look at the photo of the 2 Sporty's that disagree I can see that the 3
year old one on the left doesn't have some of the menu items like Timer,
°C, Reqclimb, etc. It's pretty clear that they have created a new
version.

http://img.photobucket.com/albums/v1...SportysE6B.jpg

--
Dallas

On May 1, 11:12 am, Dallas wrote:
On 30 Apr 2007 14:44:24 -0700, Jay B wrote:

I got exactly the same...

I assume you got the same as mine?

As I look at the photo of the 2 Sporty's that disagree I can see that the 3
year old one on the left doesn't have some of the menu items like Timer,
°C, Reqclimb, etc. It's pretty clear that they have created a new
version.

http://img.photobucket.com/albums/v1...BothSportysE6B...

--
Dallas

No, I got exactly the same as Tom, to whom I was replying...

DA = 1910...

Can't resolve your claim about new/old by the photos...too blurry.

Jay B