Exhaust in the Cockpit?

[j ferguson]

Originally Posted by Joe Perkel

For reference sake, normal background CO in the atmosphere is 0.1 PPM. Symptoms appear @ 35 PPM with a slight headache @ 6-8 hours continuous exposure. Immediate unconsciousness with 2- 3 breaths requires 12,800 PPM.

It's a viable concern in an enclosed cockpit however, that having been said, fatalities have occurred in an open air environment with a boating activity called, "transom surfing." I suspect, a freak set of circumstances on a hot still day while on the ground, could possibly duplicate this.

seems like we're relying on dilution, which makes sense. what provoked this line of discussion was Koloman's very nice stacks on the Austro-Daimler and me wondering why, if this was satisfactory, anyone would go to the elaborate schemes we see on some of the other planes. Or, did observers come back from patrols a bit woozy and it was hoped that running the exhaust up to above the wing might cure the problem.

thanks much to you all for helping me with this concern.

john

[Koloman Mayrhofer]

hallo,
the hiero engine turns the same direction as the austro daimler. anti clockwise if you look at them from the front.

the first few albatrosses build in austria had a collector system like the german build examples but very soon they realised that they are very expensive to make and was used up so quickly from the heat that they changed to the simpler and less expensive single stacks.

little can be found in the documents about the problem pilots may have had.
i had not found anything on single seaters but there are complains on twoseaters. this may have to do that the normal single seater mission was 30 minutes to 1 hour and the typical twoseater mission was more than 2 or 3 hours.
there is much more evidence about problems with the noise. this engines are extremly loud.

it also seems that it has to do with differemt tyes of aircraft some was obviously more prone to get the fumes into the cockpit and others not.

this planes did not only have no firewall they have big holes in the bulkhead behind the engine to allow airflow out of the engine bay via the cockpit. pilots was happy to have some kind of heating.

cheers
koloman mayrhofer