Davenport Question

Well yes it does. If you are using a barometer it has to be raw pressure and not corrected for sea level.

 

altitude vs barometer

I am surprised to see it but it happens a lot with weather and info on smart phones these days...

The barometer you will get on a weather report from like weather.com is usually 'corrected' barometer for the elevation. SO a baro reading from your smart phone usually will not work for what the Davenport program is looking for.

Also I have seen a team in the past just search for the local elevation and punch that in the davenport. that is not accurate either because the altimeter is basically a fancy barometer...because we always leave the barometer setting at 29.92. This gives you a reading that is a combination of elevation and barometer. Lets say the elevation is 1000 foot but there's a high pressure center over you, it might read 900. That's why it's not uncommon at low elevation tracks to see negative altimeters.

In hindsight without a fancy, nice altimeter, it's just as easy to just punch in the barometer off your weather station. If you have been using altimeter, go back to your 'baseline' run and see what main jet it calls for. Let's say a 90. Go to the motor/baseline/save tab and click unlock, switch it to barometer from altimeter. Click lock then go back to nozzles/weather/jetsize tab. Estimate a barometer and start 'caculating' Keep changing the barometer until it calls for a 90 jet. Save that file, and now you have a baseline for barometer instead of altimeter.