PDA

View Full Version : flying through smoke


5179
24th Aug 2017, 02:53
carburetted engine ( avgas )......will they snuff it entering fairly dense smoke, but visual is maintained, but only just.

thanks......

B2N2
24th Aug 2017, 03:14
carburetted engine ( avgas )......will they snuff it entering fairly dense smoke, but visual is maintained, but only just.

thanks......

No....
What makes you think it would?
Define dense smoke?
1 foot visibility? 2 inches? Like in a house fire dense? About to flash over? Forest fire?
The engine doesn't stop when you fly through rain does it? 2 miles in haze because of moisture? Air pollution?
They wouldn't be able to use airplanes ( even carbureted ) in fire fighting roles.
Loss of visibility as a VFR only pilot is your biggest concern.

Mark 1
25th Aug 2017, 18:35
It's unlikely to affect the engine. Particles are typically <1 micron so won't be caught in the typical air filter and shouldn't be abrasive or corrosive passing through the engine.

It can get pretty smelly passing near wildfires. A bit like having a smoker in the cockpit.
In terms of visibility in smoke, this guidance is offered (https://www3.epa.gov/ttnamti1/files/ambient/smoke/wildgd.pdf):

Table 1: Estimating particulate matter concentrations from visibility assessment
Categories Visibility in Miles Particulate matter levels*
(1-hour average, µg/m3
)
Good 10 miles and up 0 - 40
Moderate 6 to 9 41 - 80
Unhealthy for Sensitive Groups 3 to 5 81 - 175
Unhealthy 1 1/2 to 2 1/2 176 - 300
Very Unhealthy 1 to 1 1/4 301 - 500
Hazardous 3/4 mile or less over 500

5179
26th Aug 2017, 02:16
i actually thought aircraft operating in heavy smoke, had "protection" from the residues within. I had occasion to meet dense smoke enroute, and found a way to bypass most of it. Hence this query......