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matronics(at)rtist.nl
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 Posted: Mon Oct 22, 2007 7:57 am Post subject: 3300 exhaust system |
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Has anyone tried a non-standard exhaust system and mufflers on the 3300? In
particular I'd like to know about using two smaller mufflers like these:
http://www.aircraftspruce.com/catalog/eppages/mufler8tailpipe.php
Using two of these would allow putting the oil cooler right in line with the
airflow through the oilpan, and have two heat exchangers, one for carb heat
and one for cabin heat. Someone pointed to a Sonex galery showing that setup
but without mufflers. How much does the noise level increase by not using
mufflers?
http://www.sonexaircraft.com/images/products/sonex/sonexgallery.html
Thoughts?
Rob
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N1BZRich(at)aol.com
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| Posted: Thu Oct 25, 2007 5:29 pm Post subject: 3300 exhaust system |
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In a message dated 10/22/2007 11:58:37 A.M. Eastern Daylight Time, matronics(at)rtist.nl writes:
| Quote: | | Has anyone tried a non-standard exhaust system and mufflers on the 3300? |
Rob,
Don't know what type of aircraft you are building, so this might not help, but I have a 3300 in my highly modified Esqual and no mufflers are installed. Each side is a three into one straight exhaust pipe. I use two small heat muffs, one for carb heat and one for cabin heat that fit over the straight pipe section on each side. The sound is not much louder that a 3300 with a muffler, but it does have more of a "deeper" or "throaty" sound. I really like it. The heat muffs came from - http://robbinswings.com/
Blue Skies,
Buz
See what's new at [quote][b]
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Peter H
Joined: 20 Mar 2007
Posts: 197
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| Posted: Thu Oct 25, 2007 8:31 pm Post subject: 3300 exhaust system |
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Buz
Sounds interesting. How about fitting a hot dog each side? Do you think there is any power increase with no muffler ?
Peter H
J3300 Quickie
From: owner-jabiruengine-list-server(at)matronics.com [mailto:owner-jabiruengine-list-server(at)matronics.com] On Behalf Of N1BZRich(at)aol.com
Sent: Friday, 26 October 2007 11:29 AM
To: jabiruengine-list(at)matronics.com
Subject: Re: JabiruEngine-List: 3300 exhaust system
In a message dated 10/22/2007 11:58:37 A.M. Eastern Daylight Time, matronics(at)rtist.nl writes:
| Quote: |
Has anyone tried a non-standard exhaust system and mufflers on the 3300? |
Rob,
Don't know what type of aircraft you are building, so this might not help, but I have a 3300 in my highly modified Esqual and no mufflers are installed. Each side is a three into one straight exhaust pipe. I use two small heat muffs, one for carb heat and one for cabin heat that fit over the straight pipe section on each side. The sound is not much louder that a 3300 with a muffler, but it does have more of a "deeper" or "throaty" sound. I really like it. The heat muffs came from - http://robbinswings.com/
Blue Skies,
Buz
See what's new at | Quote: | | http://www.matronics.com/Navigator?JabiruEngine-List |
01234
[quote][b]
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N1BZRich(at)aol.com
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| Posted: Fri Oct 26, 2007 9:02 am Post subject: 3300 exhaust system |
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In a message dated 10/26/2007 12:32:41 A.M. Eastern Daylight Time, peterjfharris(at)bigpond.com writes:
| Quote: | | Do you think there is any power increase with no muffler ? |
Hi :Peter,
I don't know for sure that I have an increase of power with no muffler (have not flown it with a muffler), but based on many years hot roding cars and then a Pitts Special with straight pipes, I think it helps. Any increase in power will depend on the type of muffler (or mufflers) you take off, but less back pressure generally will result in an increase of power. Besides, it sounds better to me. People still say how quiet the jab 3300 is, especially those use to hearing Lycs. and Continentals. I wish it were louder 
The 3300 set up on my airplane must work, it has been trouble free for 380 hours. Come mid December it will have been flying for 2 years and I should have at least 400 hours on it by then.
Blue Skies,
Buz Rich
<HR style="MARGIN
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Peter H
Joined: 20 Mar 2007
Posts: 197
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| Posted: Fri Oct 26, 2007 1:09 pm Post subject: 3300 exhaust system |
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Buz
That is a great shot of the Esqual .neat.
I am test flying my J3300 Quickie with fuel injection. I have given details on the list. I am getting over 170KTS CAS at this stage but there is another Quickie in Wisconsin (Paul Spackman) getting 180KTS TAS with the Bing carb. Early days yet I have only 25HRS on the engine and the prop is probably a little too big. 55”X72”pitch Sterba. Paul is getting more rpm with a 54X72 Sensenich
Regards
Peter
From: owner-jabiruengine-list-server(at)matronics.com [mailto:owner-jabiruengine-list-server(at)matronics.com] On Behalf Of N1BZRich(at)aol.com
Sent: Saturday, 27 October 2007 3:02 AM
To: jabiruengine-list(at)matronics.com
Subject: Re: JabiruEngine-List: 3300 exhaust system
In a message dated 10/26/2007 12:32:41 A.M. Eastern Daylight Time, peterjfharris(at)bigpond.com writes:
| Quote: |
Do you think there is any power increase with no muffler ? |
Hi :Peter,
I don't know for sure that I have an increase of power with no muffler (have not flown it with a muffler), but based on many years hot roding cars and then a Pitts Special with straight pipes, I think it helps. Any increase in power will depend on the type of muffler (or mufflers) you take off, but less back pressure generally will result in an increase of power. Besides, it sounds better to me. People still say how quiet the jab 3300 is, especially those use to hearing Lycs. and Continentals. I wish it were louder
The 3300 set up on my airplane must work, it has been trouble free for 380 hours. Come mid December it will have been flying for 2 years and I should have at least 400 hours on it by then.
Blue Skies,
Buz Rich
[img]cid:image001.jpg(at)01C81868.3E02B790[/img]
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N1BZRich(at)aol.com
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| Posted: Sat Oct 27, 2007 8:52 am Post subject: 3300 exhaust system |
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In a message dated 10/26/2007 5:10:01 P.M. Eastern Daylight Time, peterjfharris(at)bigpond.com writes:
| Quote: | | I am getting over 170KTS CAS at this stage but there is another Quickie in Wisconsin (Paul Spackman) getting 180KTS TAS with the Bing carb. |
Impressive numbers, Peter. At what altitude are you and Paul seeing those numbers. I have seen over 200 at WOT, but that is at sea level where I live.
Buz
See what's new at [quote][b]
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Peter H
Joined: 20 Mar 2007
Posts: 197
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| Posted: Sat Oct 27, 2007 1:32 pm Post subject: 3300 exhaust system |
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Buz
My tests are done near sea level , WOT at about 2000 ft and Paul tested WOT at 8000 ft. Are you getting 200KTS or MPH. ? What are the prop details and WOT max
RPM ?
Regards
Peter
From: owner-jabiruengine-list-server(at)matronics.com [mailto:owner-jabiruengine-list-server(at)matronics.com] On Behalf Of N1BZRich(at)aol.com
Sent: Sunday, 28 October 2007 2:52 AM
To: jabiruengine-list(at)matronics.com
Subject: Re: JabiruEngine-List: 3300 exhaust system
In a message dated 10/26/2007 5:10:01 P.M. Eastern Daylight Time, peterjfharris(at)bigpond.com writes:
| Quote: |
I am getting over 170KTS CAS at this stage but there is another Quickie in Wisconsin (Paul Spackman) getting 180KTS TAS with the Bing carb. |
Impressive numbers, Peter. At what altitude are you and Paul seeing those numbers. I have seen over 200 at WOT, but that is at sea level where I live.
Buz
See what's new at | Quote: | | http://www.matronics.com/Navigator?JabiruEngine-List |
01234
[quote][b]
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N1BZRich(at)aol.com
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| Posted: Sun Oct 28, 2007 7:26 am Post subject: 3300 exhaust system |
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Peter,
I still don't have the right prop. The current one is a 64ZK55 wood Sensenich and I can still over speed the engine at WOT by quite a bit - even up at 5000 feet or more. At sea level I really have to bring the throttle back to keep it at 3300 rpm and with that I am seeing an average of 205 MPH indicated. At 5000 feet on a standard day I can overspeed the engine with this prop by something over 150 rpm. True airspeed in MPH at 5000 and the throttle pulled back to 3300 is something like 185 to 188 mph tas. I have a 62FK68 on order that should be closer to the right prop. Will likely be at least another month until that shows up. In the mean time, with the current prop, I cruise at 8,000 to 10,000 feet on an XC at about 170 mph tas but am only burning about 5.8 gallons per hour - pretty good economy. Even with this current prop take off roll is still short (about 600' at gross weight), and rate of climb is still good (initially about 1200 fpm).
Blue Skies,
Buz
See what's new at [quote][b]
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Peter H
Joined: 20 Mar 2007
Posts: 197
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| Posted: Mon Oct 29, 2007 12:48 pm Post subject: 3300 exhaust system |
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Buz
You are getting some great results and I will be interested to hear about the new prop with 68 pitch. I think I am losing out on RPM as max WOT is barely 3000 RPM. I will consider getting a Sensenich later but I am waiting for a few more hours on the clock. With 72 pitch I get up to 1500FPM climb at 90 KTS and so I think you will not lose much in climb rate with the new prop. and it should fix the WOT factor about right. Please let me know how it works out !
That must be a slippery air frame.
Cheers
Peter
From: owner-jabiruengine-list-server(at)matronics.com [mailto:owner-jabiruengine-list-server(at)matronics.com] On Behalf Of N1BZRich(at)aol.com
Sent: Monday, 29 October 2007 1:26 AM
To: jabiruengine-list(at)matronics.com
Subject: Re: JabiruEngine-List: 3300 exhaust system
Peter,
I still don't have the right prop. The current one is a 64ZK55 wood Sensenich and I can still over speed the engine at WOT by quite a bit - even up at 5000 feet or more. At sea level I really have to bring the throttle back to keep it at 3300 rpm and with that I am seeing an average of 205 MPH indicated. At 5000 feet on a standard day I can overspeed the engine with this prop by something over 150 rpm. True airspeed in MPH at 5000 and the throttle pulled back to 3300 is something like 185 to 188 mph tas. I have a 62FK68 on order that should be closer to the right prop. Will likely be at least another month until that shows up. In the mean time, with the current prop, I cruise at 8,000 to 10,000 feet on an XC at about 170 mph tas but am only burning about 5.8 gallons per hour - pretty good economy. Even with this current prop take off roll is still short (about 600' at gross weight), and rate of climb is still good (initially about 1200 fpm).
Blue Skies,
Buz
See what's new at | Quote: | | http://www.matronics.com/Navigator?JabiruEngine-List |
01234
[quote][b]
| | - The Matronics JabiruEngine-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
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