magnum engine

[hobbico99]

is this engine any good?

http://www.hobbypeople.net/gallery/210760.asp

would it fit in a palne that says .46

[Taylorcraft]

Friend,

If it's possible to compare it to my oooold Magnum PRO .28, it should be as good as the best of them! However, the Magnum engines has been made by several different manufacturers through the years, each one trying to achieve the best quality. Some of them didn't make it, some of them made engines that really performs. I've been away from the R/C bizznizz for a while, so unfortunately I can't give a 100% exact answer regarding this particular engine.

When I got my Magnum, it had approx. 3 hours of running time on it and the previous owner said it was a dog - he could never get it to run right, and it would quit on him whenever it felt for it. When examining the engine thoroughly, I found that it wasn't even run in - after three hours of airtime... So I had to give it 3-4 hours more of time on the stand, first running in small bursts on full power and let cool off, then extending the time until it could run constantly on full throttle. Now I find the engine has lots of power and runs as long as there's fuel in the tank - only a slightly rich midrange pulls down the overall score. The two-needle carb can be tricky to adjust at first, but when you get the hang of it it's a breeze. And if this engine is just half as good as my .28, it's very good!

Will it fit in a .46 plane?

I guess it will. As long as you can get an engine mount that fits both the engine and the firewall, this shouldn't be any problem. Then again, if the manufacturer states a .46 as the upper limit, this engine could be too heavy and/or too strong, and able to give the plane too much speed (you don't put a Rolls Royce Merlin into a VW Beetle...). So check it out before you buy; if you like the engine, get a plane that fits it. If you've got a plane and likes it, get an engine that fits. :)

If your plane has a .46 as the upper limit, maybe you should consider this engine instead?
http://www.hobbypeople.net/gallery/210756.asp

Then again, if this .52 gem performs like I suspect it will, it's a bargain for that price! And when paired to a suitable plane, it should perform just perfectly. Just remember there might be a long run-in time to make it perform like it should. Use recomended fuel, plugs and propellers, and you should be happy with it for years to come. Thinking of it, maybe I should get one myself!

Happy flying and planned landings my friend!

Brg

Taylorcraft
____________________________________
Given enough power even a brick will fly.
But the lighter the brick, the better it flies!

[bigedmustafa]

I have read that the Magnum .52 XLS is actually the same mounting size as the Magnum .46 XLS. It's apparently a "bored out" version of the .46 designed to provide more displacement and horsepower without increasing the engine size. This is suppose to account for why the Magnum .52 XLS actually weighs slightly less than the .46 XLS.

Pay particular attention to Magnum's fuel recommendations - 20% pure Castor oil for break-in and at least 18% lubricant and some castor for general flight. Don't run a Magnum with only synthetic lubrication.

[bigedmustafa]

One of my local hobby stores ended up ordering a bunch of Magnum XLS .42 and XLS .52 2-strokes for a fun fly event that never happened. They ended up putting them on clearance for $49 and $55 respectively. I bought one of the XLS .52 engines, but I haven't had a chance to run it on anything as of yet.

I'll post back here on how it turned out. I am already running a GMS .47 engine that I bought from Tower for $65. That thing turned out to be a bargain! It broke in nice and quickly, has tons of power, and it runs and idles as reliably as my two O.S. FX engines.