Top Flite P-47 Gold Ed. in-cowl muffler/header question  
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Top Flite P-47 Gold Ed. in-cowl muffler/header question - 6/6/2006 2:37:47 PM   
Zipperneck



Posts: 160
Joined: 9/15/2003
From: Plan de la Tour, FRANCE
Status: offline 		Hello everyone,

I will be starting a Top Flite P-47 Gold Ed. kit and plan to put a Super Tigre G-90 2-stroke engine in it (already have it in hand). I want to install an in-cowl muffler in the beast and have consulted top flite's web site for the relevant information.

The problem is, the information given on the Top Flite site and Tower Hobbies' site is conflicting.

Top Flite suggests the TOPQ7915 in-cowl muffer plus the TOPQ7926 header for Super Tigre G-series engines (the 90 in this case).

I consulted the Tower Hobbies website (http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXHY74&P=ML) and they indicate that that in-cowl muffler is "for use on .60-.75 2-Stroke Engines. ** NOT FOR .90 OR LARGER **" and "The muffler is too restrictive for ANY 90 sized engine and will cause overheating problems."

In addition to that, it appears that Tower does not carry the muffler header (TOPQ7926).

Any ideas on what is going on here? And also do any of you have another solution for my SuperTigre G-90 problem?

Thanks,
Zipperneck
       Post #: 1

RE: Top Flite P-47 Gold Ed. in-cowl muffler/header que... - 6/6/2006 4:46:45 PM   
Zipperneck



Posts: 160
Joined: 9/15/2003
From: Plan de la Tour, FRANCE
Status: offline 		Concerning the in-cowl muffler - do you think that it would be possible to simply install a Slimline sport scale muffler ?

http://www2.towerhobbies.com/cgi-bin/wti0001p?&W=000518970&I=LXFG90&P=K

Thank to your input.... I would appreciate it.

Z

(in reply to Zipperneck)
       Post #: 2

RE: Top Flite P-47 Gold Ed. in-cowl muffler/header que... - 6/7/2006 1:04:12 AM   
P47Tbolt


 

Posts: 187
Joined: 11/12/2002
From: Harlem, GA, USA
Status: offline 		This would be a better choice.

http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXFH36&P=K

_____________________________

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about Yesterday.

(in reply to Zipperneck)
       Post #: 3

RE: Top Flite P-47 Gold Ed. in-cowl muffler/header que... - 6/7/2006 7:11:30 AM   
Zipperneck



Posts: 160
Joined: 9/15/2003
From: Plan de la Tour, FRANCE
Status: offline 		Thanks for your response.

Yes, I am aware of this muffler but it is for use when the engine is installed on its side, not vertically (upside down).

I had figured to install the engine upside down.... I'll check into this further.

Thanks again.

Zip

(in reply to P47Tbolt)
       Post #: 4

RE: Top Flite P-47 Gold Ed. in-cowl muffler/header ques... - 6/7/2006 9:23:47 PM   
WispyBot



Posts: 17
Joined: 5/12/2006
From: Lockport, IL, USA
Status: offline 		Zipperneck:
In my Top Flite P-47 I also have a Super Tiger .90, and I'm using This (LXHY74) Muffler with this (LXHY78) Header from Tower Hobbies. I've managed to get the muffler to stay put. In addition, I've installed a Dubro remote safety ignitor because the engine is mounted upside-down and hard to clip the hot-shot to the plug. I mounted it above the right wing, works great!

Precision and Consistency

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< Message edited by WispyBot -- 6/8/2006 3:33:37 AM >

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Man that was a cool manuver! How'd I do that?

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       Post #: 5

RE: Top Flite P-47 Gold Ed. in-cowl muffler/header que... - 6/8/2006 6:05:25 AM   
Zipperneck



Posts: 160
Joined: 9/15/2003
From: Plan de la Tour, FRANCE
Status: offline 		Thanks for the input Wispybot!
Yes, that is the exact combination of muffler/header recommended for that plane/engine combination by Top Flite. I find it curious that Tower feels that the muffler is too restrictive (Tower: The muffler is too restrictive for ANY 90 sized engine and will cause overheating problems.).

I sent an email to Top Flite about this. We'll see what they have to say. At any rate, it looks like that would be the way to go, and if you say it works fine....

Is any more tubing required between the header/muffler that provided with them? Do I need to order the extension kit?

Thanks again!

Zip

PS - good point about the external glow igniitor - I'll have to get a few of those!

(in reply to WispyBot)
       Post #: 6

RE: Top Flite P-47 Gold Ed. in-cowl muffler/header que... - 6/8/2006 6:12:26 AM   
Zipperneck



Posts: 160
Joined: 9/15/2003
From: Plan de la Tour, FRANCE
Status: offline 		Wispybot,
Another thing - what do you mean by: I've managed to get the muffler to stay put.

Was there some problem in that regard?

Zip

(in reply to Zipperneck)
       Post #: 7

RE: Top Flite P-47 Gold Ed. in-cowl muffler/header que... - 6/8/2006 12:02:04 PM   
WispyBot



Posts: 17
Joined: 5/12/2006
From: Lockport, IL, USA
Status: offline 		Because the muffler is not mounted to the engine, the vibration tends to loosen things up, so I built muffler mounts from stacking 1/8" ply about 4X thick to secure the muffler to the firewall. no extra tubing needed, the gap from the header to the muffler is only about 3/16"

Precision and Consistency

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< Message edited by WispyBot -- 6/8/2006 12:36:09 PM >

_____________________________

Man that was a cool manuver! How'd I do that?

(in reply to Zipperneck)
       Post #: 8

RE: Top Flite P-47 Gold Ed. in-cowl muffler/header que... - 6/8/2006 12:31:49 PM   
Zipperneck



Posts: 160
Joined: 9/15/2003
From: Plan de la Tour, FRANCE
Status: offline 		Looks like a winner. Thanks for your input!
Zipper

(in reply to WispyBot)
       Post #: 9

RE: Top Flite P-47 Gold Ed. in-cowl muffler/header que... - 6/8/2006 12:56:03 PM   
D Bronk



Posts: 2162
Joined: 4/17/2005
From: Wpg, MB, CANADA
Status: offline 		Wispy.Do I have this right?? You are NOT, haveing any overheating problems ,whatsoever,and the engine can run Full throttle ,without, getting into a deadstick situation.?

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(in reply to Zipperneck)
       Post #: 10

RE: Top Flite P-47 Gold Ed. in-cowl muffler/header que... - 6/8/2006 1:06:41 PM   
Zipperneck



Posts: 160
Joined: 9/15/2003
From: Plan de la Tour, FRANCE
Status: offline 		This is getting pretty confusing... The Header that Top Flite recommends is the TOPQ7926 (for the ST G90) and it is not listed with Tower - but the header for the STG70 is... which apparently WIspy is using.

Strange. I haven't got an answer back from Top Flite as to the contradicting info on Tower's website.

I want to get my set-up right the first time....

Zip

(in reply to D Bronk)
       Post #: 11

RE: Top Flite P-47 Gold Ed. in-cowl muffler/header que... - 6/8/2006 1:19:31 PM   
WispyBot



Posts: 17
Joined: 5/12/2006
From: Lockport, IL, USA
Status: offline 		Zipperneck:
The header I've got is TOPQ7925 which fits well, as long as I make sure the engine is not running lean, the engine performs reliably.

Precision and Consistency

< Message edited by WispyBot -- 6/8/2006 1:26:12 PM >

_____________________________

Man that was a cool manuver! How'd I do that?

(in reply to Zipperneck)
       Post #: 12

RE: Top Flite P-47 Gold Ed. in-cowl muffler/header que... - 6/8/2006 1:28:55 PM   
Zipperneck



Posts: 160
Joined: 9/15/2003
From: Plan de la Tour, FRANCE
Status: offline 		Wispy,
Is that because you couldn't find the TOPQ7926? Being a purist, I'd like to find the one made for the engine...

Did you consider the muffler that P47TBOlt mentions above?

http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXFH36&P=K

Zip

(in reply to WispyBot)
       Post #: 13

RE: Top Flite P-47 Gold Ed. in-cowl muffler/header que... - 6/8/2006 1:53:50 PM   
WispyBot



Posts: 17
Joined: 5/12/2006
From: Lockport, IL, USA
Status: offline 		Zipperneck;
From my experiance, say a hunch, the difference from the TOPQ7926 and the TOPQ7925 is that the TOPQ7926 is the same header without the tubing, the fitment of this header is correct. Good luck pal

Precision and Consistency

< Message edited by WispyBot -- 6/8/2006 1:59:51 PM >

_____________________________

Man that was a cool manuver! How'd I do that?

(in reply to Zipperneck)
       Post #: 14

RE: Top Flite P-47 Gold Ed. in-cowl muffler/header que... - 6/11/2006 5:47:54 AM