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frank.goodnight(at)att.ne
Guest

Posted: Tue Nov 01, 2011 3:12 am Post subject: noise

Hi Kolbers,

 Has anyone out there ever tried to kill some of the noise on a firestar 2 ?

I use a HKS engine with the up exhaust , and the noise is driving me nuts.

got the noise canceling head set DR 6000 sometimes use it and ear plugs

at the same time , still too loud .  To talk to the tower I have to pull power off 

and stall the plane. that works ok if I'm the one that does  the calling , but if 

someone wants to talk to me the problems  start. If anyone has had any success

with sound proofing ---batts blankets , whatever I sure would like to know what they

did.Appreciate any help. 

'

 Frank Goodnight



   

 [quote][b]

slyck(at)frontiernet.net
Guest

Posted: Tue Nov 01, 2011 4:42 am Post subject: noise

Have you tried a foam mic cover?BB  

do not archive



On 1, Nov 2011, at 7:09 AM, frank goodnight wrote:

 	  Quote: 	
		  Hi Kolbers,

 Has anyone out there ever tried to kill some of the noise on a firestar 2 ?

I use a HKS engine with the up exhaust , and the noise is driving me nuts.

got the noise canceling head set DR 6000 sometimes use it and ear plugs

at the same time , still too loud .  To talk to the tower I have to pull power off 

and stall the plane. that works ok if I'm the one that does  the calling , but if 

someone wants to talk to me the problems  start. If anyone has had any success

with sound proofing ---batts blankets , whatever I sure would like to know what they

did.Appreciate any help. 

'

 Frank Goodnight





 	  Quote: 	
		  



href="http://www.aeroelectric.com">www.aeroelectric.com

href="http://www.buildersbooks.com">www.buildersbooks.com

href="http://www.matronics.com/contribution">http://www.matronics.com/contribution

href="http://www.matronics.com/Navigator?Kolb-List">http://www.matronics.com/Navigator?Kolb-List

href="http://forums.matronics.com">http://forums.matronics.com

href="http://www.matronics.com/contribution">http://www.matronics.com/contribution



	


	


 [quote][b]

aslink

Joined: 23 Jul 2011
Posts: 25

Posted: Tue Nov 01, 2011 5:18 am Post subject: noise

Frank,

 This problem concerned me from the start  with construction of my Firestar II with HKS engine.  It was  obvious to me we need to get the noise behind us.  I have never seen it  done, but I am putting my exhaust under the engine and out the back.  I  realize it takes a custom made exhaust system, but think it will be worth  it.  This also eliminates the huge amount of drag the muffler creates on  top.  It also, in my mind, necessitated a custom fuel tank which can be  firewalled from the muffler heat and fire potential.  Mind you, this is  still in the developmental process.  Included are a few pictures showing  the oil cooler and oil reservoir up front where they need to be.  You will  see a substitute wing root profile used for reference purposes during  fabrication and spacing.  Eventually the whole gap seal area will have a  light one piece removable fiberglass airfoil covering with an air  intake opening channeled to the oil cooler.  In the winter the oil  cooler and oil tank can be used as a cabin heat source.   

 Andy

 WN31

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_________________
Andy

frank.goodnight(at)att.ne
Guest

Posted: Tue Nov 01, 2011 5:20 am Post subject: noise

HI Robert , 

I do have a foam mic cover -- came with the head set-- Larry plane is pretty much as

you saw it except for nose bowl and shorty windscreen. Am in the process of putting

on a full windshield for the winter --it gets COLD-- here in north ARK.

  Wife wants to drive down to Nauga Field then on to FLA to see friends. I would like to see all of you guys , will probably do it.

Frank Goodnight

From: robert bean <slyck(at)frontiernet.net>

To:  kolb-list(at)matronics.com

Sent: Tue, November 1, 2011 7:40:15 AM

Subject: Re: noise



Have you tried a foam mic cover?BB  

do not archive



On 1, Nov 2011, at 7:09 AM, frank goodnight wrote:

 	  Quote: 	
		  Hi  Kolbers,

 Has anyone out there ever tried to kill some of the noise on a firestar 2 ?

I use a HKS engine with the up exhaust , and the noise is driving me nuts.

got the noise canceling head set DR 6000 sometimes use it and ear plugs

at the same time , still too loud .  To talk to the tower I have to pull power off 

and stall the plane. that works ok if I'm the one that does  the calling , but if 

someone wants to talk to me the  problems  start. If anyone has had any success

with sound proofing ---batts blankets , whatever I sure would like to know what they

did.Appreciate any help. 

'

 Frank Goodnight





 	  Quote: 	
		  



href="[url=]http://www.aeroelectric.com">[/url]www.aeroelectric.com>

href="[url=]http://www.buildersbooks.com">[/url]www.buildersbooks.com>

href="http://www.matronics.com/contribution">http://www.matronics.com/contribution

href="http://www.matronics.com/Navigator?Kolb-List">http://www.matronics.com/Navigator?Kolb-List

href="http://forums.matronics.com">http://forums.matronics.com

href="http://www.matronics.com/contribution">http://www.matronics.com/contribution



	




	


   

 [quote][b]

George Alexander

Joined: 10 Jan 2006
Posts: 245
Location: SW Florida

Posted: Tue Nov 01, 2011 5:39 am Post subject: Re: noise

 	  frank.goodnight(at)att.ne wrote: 	
		  Hi Kolbers,

 Has anyone out there ever tried to kill some of the noise on a firestar 2 ?

I use a HKS engine with the up exhaust , and the noise is driving me nuts.

got the noise canceling head set DR 6000 sometimes use it and ear plugs

at the same time , still too loud .  



- SNIP -

 Frank Goodnight

	




You may want to be sure that your headset has good cups/seals and fits snug.  Even wearing glasses..... the ear piece will open the seal enough to let lots of noise in.



I use the DRE 6000 put into a Comtronics shell/helmet.  Snugging up chin strap gives a tight seal (that Tupperware would be envious of).  My FS II is a standard configuration with a R503 DCDI; 3.47 C Box and a Powerfin 3 prop.

_________________
George Alexander
FS II R503
E-LSA N709FS
http://www.oh2fly.net

neilsenrm(at)gmail.com
Guest

Posted: Tue Nov 01, 2011 7:08 am Post subject: noise

Frank



This is a issue I have been trying to fix for some time. I currently wear Sony noise reducing ear buds under noise canceling head sets. This solution works but I would like better. I have tried different mufflers and a bunch of noise dampening insulation with only limited success. I have had a number of different engines and engine mounts and found that one particular mount that had real soft mounting bushings/vibration dampers had the lowest pilot noise levels by far. My current engine mount needs softer bushings to reduce the noise producing vibrations being transferred to the air frame. I drilled four 1/8 inch holes in one bushing last spring and noticed some improvement and no ill effects on the bushing. I have a line on softer bushings from Lord Mounts but haven't called yet. I also noticed that John H has his fuel tank mounted high in the cage between between people and the engine and that seemed to make things much quieter than other 912 powered MKIIIs. 

 



Rick Neilsen

Redrive VW Powered MKIIIC



On Tue, Nov 1, 2011 at 9:11 AM, Andy and Sheila Slinkard <andysheila(at)eltopia.com (andysheila(at)eltopia.com)> wrote:

 [quote]       Frank,

 This problem concerned me from the start  with construction of my Firestar II with HKS engine.  It was  obvious to me we need to get the noise behind us.  I have never seen it  done, but I am putting my exhaust under the engine and out the back.  I  realize it takes a custom made exhaust system, but think it will be worth  it.  This also eliminates the huge amount of drag the muffler creates on  top.  It also, in my mind, necessitated a custom fuel tank which can be  firewalled from the muffler heat and fire potential.  Mind you, this is  still in the developmental process.  Included are a few pictures showing  the oil cooler and oil reservoir up front where they need to be.  You will  see a substitute wing root profile used for reference purposes during  fabrication and spacing.  Eventually the whole gap seal area will have a  light one piece removable fiberglass airfoil covering with an air  intake opening channeled to the oil cooler.  In the winter the oil  cooler and oil tank can be used as a cabin heat source.   

 Andy

 WN31

 [quote]   ---

gliderx5

Joined: 30 Jun 2008
Posts: 203

Posted: Tue Nov 01, 2011 3:20 pm Post subject: noise

Frank



I had problems transmitting from my Titan Tornado, but I could hear just fine.  The Tornado with a 503 is louder than my old MKII was.  The issue I had was solved with a remote push to talk switch.  I use an Icom A6 and there is a bug in the radio.  If you use a headset with the radio, and use the transmit switch on the side of the radio, the mic on the radio itself is activated, not the one on the headset.  To activate the headset mic I had to attach a remote PTT.  Worked great once I did that.  Also worked great when hooked up to an intercom for some reason.  May not be the problem that you are having, but something to be aware of if using an A6.



Malcolm



From: "frank goodnight" <frank.goodnight(at)att.net>

To: kolb-list(at)matronics.com

Sent: Tuesday, November 1, 2011 7:09:55 AM

Subject: noise



Hi Kolbers,

 Has anyone out there ever tried to kill some of the noise on a firestar 2 ?

I use a HKS engine with the up exhaust , and the noise is driving me nuts.

got the noise canceling head set DR 6000 sometimes use it and ear plugs

at the same time , still too loud .  To talk to the tower I have to pull power off 

and stall the plane. that works ok if I'm the one that does  the calling , but if 

someone wants to talk to me the problems  start. If anyone has had any success

with sound proofing ---batts blankets , whatever I sure would like to know what they

did.Appreciate any help. 

'

 Frank Goodnight



   

 [quote]



_blank">www.aeroelectric.com

" target="_blank">www.buildersbooks.com

_blank">http://www.matronics.com/contribution

get="_blank">http://www.matronics.com/Navigator?Kolb-List

tp://forums.matronics.com

_blank">http://www.matronics.com/contribution



[b]

Richard Pike

Joined: 09 Jan 2006
Posts: 1670
Location: Blountville, Tennessee

Posted: Tue Nov 01, 2011 6:32 pm Post subject: Re: noise

Andy - the pictures you have posted have files sizes of over 1 mb, and now the thread (for those of us that read it on the internet and not email) has become unreadable in the sense that it is more trouble than it's worth to scroll back and forth to read what people write.



There are lots of free picture resizers online that will knock the pictures down to a more convenient size in the future.



Thanks

_________________
Richard Pike
Kolb MKIII N420P (420ldPoops)
Kingsport, TN 3TN0

Forgiving is tough, being forgiven is wonderful, and God's grace really is amazing.

aslink

Joined: 23 Jul 2011
Posts: 25

Posted: Tue Nov 01, 2011 7:06 pm Post subject: noise

Just double click on the attachment for a smaller version.  The larger size 

gives better detail.

---

_________________
Andy

Tom McCarthy

Joined: 24 Feb 2011
Posts: 15
Location: 61C

Posted: Wed Nov 02, 2011 5:01 am Post subject: noise

This is how I addressed the muffler issue with the HKS on my Slingshot.  For the Tractor enthusiasts out there, I found the best muffler that fit the application was  IH Farmall A  muffler.  It is light weight and short, and had the correct input diameter.  It also has adequate back pressure and everyone tells me it sounds very good from the ground. I installed a heat shield between it and the cockpit, which never even gets warm.  It is still relatively loud in the cockpit, but just a set of noise canceling headphones makes for easy communication and very easy on the ears for long flights.  It is much quieter than my original Firestar with a Rotax 377, which requires earplugs and noise canceling headset.  I am sending a picture, but not sure if it will post to the list, never sent one before.  If not, just send me a PM, and I will send it direct.





Tom McCarthy

IMG_0003.jpeg

Description:

Filesize:

27.65 KB

Viewed:

12085 Time(s)

_________________
Tom McCarthy
N514TM Zenith 601HD
N414TM Kolb FireStar 1
N863GB Kolb Slingshot

John Hauck

Joined: 09 Jan 2006
Posts: 4639
Location: Titus, Alabama (hauck's holler)

Posted: Wed Nov 02, 2011 5:39 am Post subject: noise

Subject: Re: noise



This is how I addressed the muffler issue with the HKS on my Slingshot.   



Folks:



A simple test to determine what is producing the noise on your Kolb is find

a tractor aircraft with the same engine and prop your are flying on your

Kolb.  Have someone fly the Kolb overhead followed by the tractor configured

aircraft.



In my case, I listened to a RANS S7 powered by a 912ULS and 3 blade Warp

Drive Prop last Saturday morning.  No comparison between the noise my MKIII

generates and the RANS.



Other tractor aircraft with the 912UKLS that are extremely quiet compared to

a Kolb are the Highlander and the old Kolb Flyer (Pelican), both in and out

of the cockpit.



If you have a chance, listen to a Lake Amphibian sometime.  It is a pusher,

and it is also noisy.



I'd like a nice quiet cockpit, but I guess I am hooked on Kolbs, and will

accept the noise with the performance.



john h

mkIII

Titus, Alabama

_________________
John Hauck
MKIII/912ULS
hauck's holler
Titus, Alabama

John Hauck

Joined: 09 Jan 2006
Posts: 4639
Location: Titus, Alabama (hauck's holler)

Posted: Wed Nov 02, 2011 5:43 am Post subject: noise

I'd like a nice quiet cockpit, but I guess I am hooked on Kolbs, and will

accept the noise with the performance.



john h

 

Sorry, Folks:



Forgot to include my point, above.



I believe the prop is the primary noise generator on pusher aircraft.



My hearing is so poor I cannot understand the spoken word on the radio

without an ANR headset and the volume turned up max.



john h

mkIII

Titus, Alabama

_________________
John Hauck
MKIII/912ULS
hauck's holler
Titus, Alabama

aslink

Joined: 23 Jul 2011
Posts: 25

Posted: Wed Nov 02, 2011 5:52 am Post subject: noise

Hey Man, I like it!  Send more pictures. Good ole farmer ingenuity, "if man 

made it, it can be improved". That muffler must have been found strolling 

through the bone yard. Many a good  ideas originate there.



Thanks for posting. Andy   WN31

---

_________________
Andy

Richard Pike

Joined: 09 Jan 2006
Posts: 1670
Location: Blountville, Tennessee

Posted: Wed Nov 02, 2011 6:27 am Post subject: Re: noise

 	  aslink wrote: 	
		  Just double click on the attachment for a smaller version.  The larger size 

gives better detail.

--- 	




What browser are you using? Neither Firefox, Internet Explorer, Safari, or Opera will do that, although if you hold down the Ctrl button and tap either the - or + keys, you can make the whole page larger or smaller. Of course, then the print is too small to read.



It is not necessary to use enormous pictures to be able to see something clearly, but it does require the reader to take the scroll bar and drag it back and forth, back and forth... That is my point. Reading such posts are more trouble than they are worth.



Also, consider what Matt Dralle puts in the guidelines:"- Remember that your post will be included for posterity in an archive that is growing in size at an extraordinary rate. Try to be concise and terse in your posts. Avoid overly wordy and lengthy posts and responses." I would add that using pictures over 1 megabyte instead of resized pictures of just a few kilobytes would certainly fall into that category. If you are determined to use inconveniently sized pictures, then at least put "Do not archive" at the end of your posts

_________________
Richard Pike
Kolb MKIII N420P (420ldPoops)
Kingsport, TN 3TN0

Forgiving is tough, being forgiven is wonderful, and God's grace really is amazing.

frank.goodnight(at)att.ne
Guest

Posted: Wed Nov 02, 2011 11:16 am Post subject: noise

Hi,

would like to thank everyone that shared  coments about the noise our planes

make. Looks like a lot of people share my dislike of a noisy cockpit.I'll try some of 

your ideas.

Frank  Goodnight

Firestar 2

HKS



From: Richard Pike <richard(at)bcchapel.org>

To: kolb-list(at)matronics.com

Sent: Tue, November 1, 2011 9:32:46 PM

Subject:  Re: noise



 --> Kolb-List message posted by: "Richard Pike" <richard(at)bcchapel.org (richard(at)bcchapel.org)>



Andy - the pictures you have posted have files sizes of over 1 mb, and now the thread (for those of us that read it on the internet and not email) has become unreadable in the sense that it is more trouble than it's worth to scroll back and forth to read what people write.



There are lots of free picture resizers online that will knock the pictures down to a more convenient size in the future.



Thanks



--------

Richard Pike

Kolb MKIII N420P (420ldPoops)

richard (at) bcchapel(dot)org

Kingsport, TN 3TN0

Now faith is the substance of things hoped for, the evidence of things not seen. 

Hebrews 11:1





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