Putting a .45 engine on a .39 airplane kit  
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All Forums >> RC Airplanes >> Questions and Answers >> Putting a .45 engine on a .39 airplane kit
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Putting a .45 engine on a .39 airplane kit - 9/2/2008 12:59:14 PM   
NoviceMikeG


 

Posts: 2
Joined: 9/30/2003
From: Verona, PA,
Status: offline 		I found a kit that I would like to build. As I was re reading the tech specs, it says the plane is for a .19 - .39 engine. What are the ramifications of building that plane and using an existing .45 engine?
       Post #: 1

RE: Putting a .45 engine on a .39 airplane kit - 9/2/2008 1:27:41 PM   
Gringo Flyer



Posts: 2249
Joined: 1/16/2004
From: Formosa, ARGENTINA
Status: offline 		Most of the time it will be fine. Just be sure to keep CG in the right plane.

What plane is it? You dont see very many planes with that size engine recomnedation.


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(in reply to NoviceMikeG)
       Post #: 2

RE: Putting a .45 engine on a .39 airplane kit - 9/2/2008 1:43:28 PM   
John Palica


 

Posts: 1228
Joined: 5/22/2003
From: Vernon, CT, USA
Status: offline 		A little extra power doesn't hurt. You can always pull the throttle back and cruise around but if you get into a jam, it's nice to have that extra power to pull you out. As mentioned, pay attention to the CG.

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RE: Putting a .45 engine on a .39 airplane kit - 9/4/2008 1:53:13 AM   
TedMo


 

Posts: 417
Joined: 6/11/2006
From: Sun City Center, FL, USA
Status: offline 		That's quite a variable, 19-39. Extra power can be ok but also must be concerned with extra weight, structural integrity and CG as mentioned. Off hand without knowing more about plane I would not recommend a 45 engine.

(in reply to John Palica)
       Post #: 4

RE: Putting a .45 engine on a .39 airplane kit - 9/4/2008 3:48:46 PM   
bassfish


 

Posts: 91
Joined: 5/16/2007
From: wapakoneta, OH, USA
Status: offline 		..

< Message edited by bassfish -- 9/4/2008 3:57:49 PM >

(in reply to TedMo)
       Post #: 5

RE: Putting a .45 engine on a .39 airplane kit - 9/4/2008 3:56:24 PM   
bassfish


 

Posts: 91
Joined: 5/16/2007
From: wapakoneta, OH, USA
Status: offline 		I wouldn't worry about it. If it will fit, put it on. Just make sure that you are allways aware of the power. Start out with min throttle till u get used to it and then increase as u get more used to it. I've been flying a kit built Sig Kadet recomended motor was a .25, (plane is over 30 yrs old) with an O.S. .60 and it flys great. The only thing I added was alerons.>>>-> Bill

(in reply to TedMo)
       Post #: 6

RE: Putting a .45 engine on a .39 airplane kit - 9/5/2008 11:22:09 AM   
NoviceMikeG


 

Posts: 2
Joined: 9/30/2003
From: Verona, PA,
Status: offline 		The kit is a SIG Kobra. Correct balance has always been a priority when I build a kit. I am a part-time flyer right now, so a well balanced plane compensates for wanting skills.

Thank you all for your input and encouragement.

(in reply to bassfish)
       Post #: 7

RE: Putting a .45 engine on a .39 airplane kit - 9/8/2008 1:43:10 PM   
bassfish


 

Posts: 91
Joined: 5/16/2007
From: wapakoneta, OH, USA
Status: offline 		Hi my friend, I also have the Kobra with an o s .60 and no problems with balancing . Flys great!

(in reply to NoviceMikeG)
       Post #: 8

RE: Putting a .45 engine on a .39 airplane kit - 9/8/2008 4:37:17 PM   
daven



Posts: 7026
Joined: 12/7/2001
From: Andover, MN, USA
Status: offline 		Is that a Kobra or King Kobra BassFish?

I think you could put a .45 in the small one also, but a 60 sounds big...

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(in reply to bassfish)
       Post #: 9

RE: Putting a .45 engine on a .39 airplane kit - 9/8/2008 5:17:15 PM   
bassfish


 

Posts: 91
Joined: 5/16/2007
From: wapakoneta, OH, USA
Status: offline 		It is the Sig "Kobra kit" ws-45in. recommended engine, .19 to .35

(in reply to daven)
       Post #: 10

RE: Putting a .45 engine on a .39 airplane kit - 9/8/2008 6:53:56 PM   
daven



Posts: 7026
Joined: 12/7/2001
From: Andover, MN, USA
Status: offline 		wow, how did you like it?

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Dave Norman

klasskote.com
supertrc.com

(in reply to bassfish)
       Post #: 11

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