Engine for Sig Somthin Extra - RCCanada - Canada Radio Controlled Hobby Forum
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Old 07-12-2007, 01:06 PM   #1
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Engine for Sig Somthin Extra

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Hi guys, I will be building an S.S.E. this winter and would like opinions on the ideal engine for this plane. I will be using it to try to learn how to hover/harrier and other basic 3D manuevers. From what I have been hearing is that they tend to be on the tail heavy side and that substantial nose weight has to be aded to get them to balance properly.
The ones I have seen fly have been running .46 size engines with 11x6 props. I like the idea of staying with a .46 two stroke, but would the engine benefit from a 12.25x3.75 prop as I am not interested in top speed but upline pull. Would a four stroke be a better match due to more tourque. I do not own a f.s. so I am not familiar with their tourque curve. I do not like the idea of adding extra nose weight to balance a .46 so would a .61ts with extra power and weight be too much for the air frame.
Any tips/suggestions will be appreciated.

Thanks everone,

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Old 07-12-2007, 05:27 PM   #2
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I have used the 12.25 X 3.75 prop on the Somethin' Extra as well as Funtana. In both planes I ran an O.S. .50SX and found this to be a good combination. I tried the same prop on an Evolution .46 and found the prop to be too much for the engine as it would load up a bit and wouldn't give me the throttle response that I wanted for 3D.
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Old 07-12-2007, 05:52 PM   #3
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Old 07-12-2007, 09:36 PM   #4
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I have had the somethin extra previously with a 46 FX. It pulled it straight up pretty well with a 12.25 x 3.75 prop. It would hover, but not very well. That is about the only real 3d you will be able to do with it. If you really want something that is easy to learn 3D with then i would suggest getting a mojo. You can find out more about it at http://www.swanyshouse.com. It is so easy to harrier and hover. It flies so slow as well. Power with a 46 FX is awesome and it will pull out of a hover no problem. Check out a short clip of mine here : http://www.rccanada.ca/bb/viewtopic.php?t=34566. It is also very durable because of the fiberglass tube running through the fuse. It is fairly cheap right now with the high exchange rate. It won't dissapoint.
good day
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