Just curious, I've read on a few threads that the Wonder is able to fly slow. Can anyone elaborate on this? How slow can it fly compared to a trainer when equipped with a .25FX? I'm only asking because I would like to build something while I practice my flying abilities with my SPAD. Seeing that the Wonder is small in size and I should be able to fit my .25FX that's gathering dust right now, it seems like a good option. I don't have any place to build a larger kit right now.

I'm planning to invest quite some time with the covering of this plane, I'll try to do something cool with it. Of course I will only fly it once I feel I'm ready... or maybe not

Binary_01 Hi.... The wonder will be "OK" at slower speeds, But it really
likes to go "fast".. In no way will it fly like your trainer. And because of
the speed they can be a chore to fly if your not use to this type of model...
The .25 will scoot the wonder along pretty fast!! I was going to get one to
fly with fellow members.. But I ended up not getting it... If you do get one,
Keep your eyes on it:-) It'll go from where it was to where you don't want
it to go before you know it :-0 You do know... No landing gear.... Hand
launch... and engine off landings.. So be close to the runway at tank's end..

Binary_01,
First of all, flying a Sig Wonder slowly is almost an oxymoron. They are designed to fly FAST. If you read the Sig Literature it says "If you blink your eye you'll Wonder where it went", that's why they gave it that name.

Second,
A .25 is really too big for it. I thought about putting a 25 on one, but after reading the instructions, looking at the kit, and talking to a few people I came to the conclusion that a 15, maybe 20 max, would be a better motor. A 25 FX weighs too much and will pull the plane apart.

Third,
This plane is a handful. First off, you have to hand launch it which can really take some quick reflexes to manage. Since you're posting this question in the beginners section I assume you are still pretty close to being one. This plane needs some experience under your belt before you fly it. I'm not trying to talk you out of it, because it is an absolute blast to fly, but get some more experience before you fly this.

That's my 02ΒΆ worth

This plane is a handful. First off, you have to hand launch it which can really take some quick reflexes to manage. Since you're posting this question in the beginners section I assume you are still pretty close to being one. This plane needs some experience under your belt before you fly it. I'm not trying to talk you out of it, because it is an absolute blast to fly, but get some more experience before you fly this.

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ROGER THAT!

I too think the Wonder is not a good choice for a second plane.

When you say you have little room to build a plane, how little room do you have? Do you have room to build a .25 size kit? I happen to think the Pilot 25S is a great second kit to build, and it's a perfect size for the .25 FX. Since it was my second kit, I'm a bit biased. Anyway, there's a picture of the one I built (a long time ago when it was called a QB20S) in my gallery. There's also a picture of the low wing QB20L (my third plane) in my gallery. Both of these planes flew great and were fun to build. I'm not sure where to get them in Canada, but in the US, they are available from MRC at www.modelrec.com.

The Wonder was designed for .15 size engines. Lots of folks put .25s and even larger on them, but the extra weight raises the wing loading considerably. This isn't a problem if you keep the speed up. But low-speed characteristics are a distant dream.

And the others are right; the Wonder is NOT for the inexperienced. It is indeed a handful, even when built and powered according to the design plans. Mine had a .15 FP and was definitely an adrenaline-producer...

Unfortunately, kits for .20/.25 engines are scarce in a new ARF world of scarce kits in general. If you can wait, finding a 20-sized kit of a Stik or similar on eBay or here would be your smart move, IMO.