Hi all, I have a world models Nemesis 52 arf on the way and had a question about the engine size. The specs call for a .52 - .56 4-stroke, but I was wondering what other options I had, and what you guys would do. Also, what would be the best servos?

Thanks

here is the link to the plane
http://www.theworldmodels.com/para/p...airplaneid=176

If you have one, use a 70 four stroke. Standard ball bearing servos should do it but you can upgrade to hi-torque S3010's (or equivalent) if you think you'll need it but planes like that go fast and are not 3D set-up on the throws.

A 55 - 61 2-stroke would be good too

Hi folks. I’ve not seen too much written about this model, so I thought I’d give you all a quick review of my experience with the Nemesis 52.

Firstly, I would not recommend anything bigger than the 52 four-stroke noted in the instructions. I personally used an OS 55AX and found the engine to have excellent power, without going silly on weight up the front. Even with this engine, and a slimline pitts muffler, I had to put around three ounces of weight in the tail to balance it. Anything bigger, and you’ll need to add too much weight to balance and lose much of the advantage you thought to gain. Yes, it will still fly of course, but not so pleasantly – nor as slowly.

As for top speed, I was a little disappointed with the Nemesis in this area, but this might be down to my engine still being a little tight, as it seems to get faster each flight. I personally like my models to be fast and manoeuvrable, but not skittish, and with this model I used exponential (50%) for the first time, rather than suffer the problems with my normally (very) high rates. Roll rate is quite good and the elevator response is also, but I worry about pulling too many g’s at this stage as I’ve not yet been completely satisfied that the tail won’t part company. The horizontal stabilizer is built-up and tends to shake quite a bit with the slightest vibration (just like the H9 Pulse that belongs to one of my mates). It would have been better if this had been a solid surface, and the weight penalty would not have been noticeable anyway. The rudder is excellent and allows great knife-edge flight, although I must say that I used more throw than recommended in the instructions. I always use as much rudder as I can get, and then adjust with rates as necessary. The Nemesis needs quite a bit of down elevator during inverted flight, but the wing is only semi-symmetrical so this is to be expected I guess.

I found the main landing gear to be entirely satisfactory and strong enough for all landings I’ve undertaken to date. However, I did replace the tail gear with a DuBro unit as I prefer the looks of a proper tailwheel, and the strength and handling is much improved. Landings are quite good and the Nemesis slows quite well for the approach. It seems to have no real tendancy to tip-stall, and settles in nice and stable. I wouldn’t recommend pulling too hard on the final turn however, as I feel it would tend to bite if the airspeed was a little slow. I can’t say that I’ve found this to be a problem, but I don’t go looking for trouble either.

Construction quality is very good, much better than I expected, and the fuselage is predominantly laser-cut ply with a balsa lower surface and a formed fibreglass turtledeck. The cowl is beautiful, but sadly must be cut in many places to fit the 55AX. I love the blue colour used on this model, and it really looks great in the air, although it tends to disappear too early on overcast days. I’m thinking of putting a couple of dayglow stripes on the lower surface of the wings to help me see it in the air. The wings are well built, again mostly of ply, with balsa used for leading and trailing edges and centre section as would be expected. Covering material is great, and needed very little shrinking with the heat gun. Also, it seems to not be as bothered by the heat as many of the other ARFs that we have at our field.

The only thing I would critisize on this model, would be the plastic upper fuselage/canopy. Here in South Australia, we are currently going through a heatwave, and for some stupid reason, I managed to forget that I had left the canopy in the car when everything was unpacked. By the time I returned and found it a couple of hours later, it was totally deformed and useless. My mistake of course, but if it had been fibreglass, I would still be flying – rather than trying to find a replacement. I may yet have to make my own as I’m having trouble sourcing one.

I’ll post a couple of photos soon, but I’m currently on a work computer and don’t have them with me.

Overall, I’m happy with the Nemesis 52, and will be flying it as one of my main models for some time yet – all being well.

Hi!
It's .40 size plane!!!
Use a .52 four stroke or a .40-.46 two stroke! No more!!!
I would use Hs 225 servos on aileron and elevator and Hs 80, 81, or 85 on throttle and side rudder. But standard servos like Futaba 3003, 3001 or Hs 300 or 425 will do too. But remember low weight is essential as usual if you want good performance!

I quite agree, this model needs nothing more than the stated 52-56 four-stroke. I used the 55AX because I had one available and I figured the weight difference would have been negligable anyway. As for servos, I used JR549s on the ailerons and JR539s for everything else. Digital servos aren't really required but again it gets back to what you have available or how much you want to spend. Since you have two aileron servos there won't be any problems with torque anyway.

Here are a couple of photos of my Nemesis. If anybody knows where I can find a replacement canopy/top deck I would really appreciate it.

Cheers,
Greg