O-320 Exhaust.. what is it?
- Thread starter JP11
- Start date
mike mcs repair
Registered User
chugiak AK
vetterman?
mike mcs repair
Registered User
chugiak AK
wireweinie
FOUNDER
Palmer, AK
Reminds me of a Cherokee exhaust. Lots of extra welds there, maybe someone modified it?
Web
Web
It's not that the heat isn't hot enough.. it's that I don't think I have quite enough volume of air.
For now... I'm going to go with the 'get a better headset' plan. I have an old 9v Bose.. and I'm going to add an A20 to the mix. Still working a few intercom issues. According to Sigtronics.. I need to add a small 220ohm resistor to the line (volume of intercom gets about 30% better when I shut off the radio) .
However... the volume knob on the Garmin 40 radio has no effect on the volume in the headset (of the aviation radio chatter)
Little issues.. I'll get through them all.
JP
wireweinie
FOUNDER
Palmer, AK
wireweinie
FOUNDER
Palmer, AK
Sigtronics have a problem with impedance matching to the other equipment it's connected to. Adding the resistor is just a bandaid fix. If it works at all. The permanent fix is to install an intercom system that uses a separate amplifier at each station instead of one amp for all, like the Sig.
If the radio is an SL-40 (?), Then the programing needs to be set. Go into programing mode and find 'Headphone Level'. If you want to be able to adjust the volume with the knob, you need to set the headphone level to '0'. Any other setting will lock the volume to that level.
Web
mike mcs repair
Registered User
chugiak AK
AHA! I didn't catch that in the book. I tried other settings, but not zero.
Thanks.
Since good communications is a big part of giving a ride (especially with the kids I take) then I will likely swap it out.
JP
Don't have one. I'd like to get by airport and check my tailwheel (put air in it after it went flat) before I head to work in the morning.
I'll snap a pic if I do.
Thanks.
bob turner
Registered User
Back to the headset:
We have found that Bose is not all that great in high noise environments. Down here, it is against the law to close a Cub door, and the biplanes have a huge noise problem.
And, us older types can't hear anyway.
One of my buddies was going to sell his beautiful Waco. Said he had tried everything - thousand dollar headsets, etc. I suggested a David Clark H10-13.4 with an Oregon Aero muff, and he is keeping the Waco - now he can hear the tower.
We have found that Bose is not all that great in high noise environments. Down here, it is against the law to close a Cub door, and the biplanes have a huge noise problem.
And, us older types can't hear anyway.
One of my buddies was going to sell his beautiful Waco. Said he had tried everything - thousand dollar headsets, etc. I suggested a David Clark H10-13.4 with an Oregon Aero muff, and he is keeping the Waco - now he can hear the tower.
wireweinie
FOUNDER
Palmer, AK
I agree about DC headsets being great, but a 'helicopter model' is the same as the others except for the plug. Things like gel ear seals or extra sound insulation are available for all of the C models.
Web
I have two small firewall 'bump outs' that are there to allow a bit more rudder travel. They are about 1" deep. They are completely uninsulated. I bought a couple small pieces of dynamat (i figured thin, but better than nothing) to put onto there.
I bought a couple of the oregon aero mic muffs. I figured your right, the mic picking up cockpit noise certainly wasn't helping, and will get worse with the windows and door open.
I do really like the bose (i have a very old one that I use for flying my 140, and towing gliders in the bird dog) . but I'm waffling on buying it, or a new DC head vise. I wish they would all get rated for passive and active attenuation. I think that the active stuff matters when it's a long day.. but for short flights in a noisy airplane... I think the high frequency stuff, not canceled out by the electronic may matter more.
JP
I bought a couple of the oregon aero mic muffs. I figured your right, the mic picking up cockpit noise certainly wasn't helping, and will get worse with the windows and door open.
I do really like the bose (i have a very old one that I use for flying my 140, and towing gliders in the bird dog) . but I'm waffling on buying it, or a new DC head vise. I wish they would all get rated for passive and active attenuation. I think that the active stuff matters when it's a long day.. but for short flights in a noisy airplane... I think the high frequency stuff, not canceled out by the electronic may matter more.
JP
Steve Pierce
BENEFACTOR
Graham, TX
Not a Vetterman, Larry posted above, must be a copy.
Mystery solved. It's now quieter. Down around 113db now. New intercom will help more.. but I can talk at full power now and be heard, couldn't before.
Cabin heat works great
Temps are about 50 degrees cooler on CHT.
Seems this one was made by Aircraft Exhausts Inc
