Nitroplanes Ultimate 40S
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I LOVE this plane!

Throw in a high output.46-.47 engine such as an O.S. AX .46, or T.H .46 with an 11x6 APC prop and you'll have an unlimited vertical, highly acrobatic plane that is just a blast to fly!

Snap rolls are blindingly quick, yet the plane is very well behaved and settles into a gentle glide on approach.... always come in with at least 10-15% throttle on this setup and you will NOT get in trouble, as the 11x6 provides enough pitch speed to keep you from stalling the plane out. Other props will not produce as docile flight...

This plane is small enough that you can toss it in the back seat or trunk w/o problems and yet large enough that it is the equal of very nimble monoplanks in acrobatics.

Tips to make it better:
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- Fuel proof everything. This adds strength and protects the inner surfaces. A light 50-50 mix or more diluted is fine.
- Remove any wrinkles then clear coat the parts when you get the plane. This will help seal the nice finish and prevent it from coming up in flight over time.
- The NP Ultimate 40S has great wheel pants, which are made of fiberglass. PUT THEM AWAY! Put larger 2.75" or bigger Ultralights on it, and enjoy the ease of takeoffs & landings over short grass. Save the pants for later.
- Re-enforce the gear wood areas. Insert a short piece of hard ply along the fuselage sides, epoxy to both the bottom and side walls. Harden the wood with CA and Epoxy.
- Re-enforce the wing strut hold downs by using small pieces of angled balsa against the "white" supports, Epoxy and then CA the remaining exposed wood to re-enforce this area greatly and prevent crash damage.
- Use a Carbon Fiber rod cut in half to form a tail support going from the fuselage towards the outer part of the elevator. Partially drill to make attachment points then epoxy the CF in place.
- Install wing tip skids to prevent runway rash damage to the wing tips and keep the finish looking good.
- You do not need wing "jigs" with this plane see next point.
- When you install the wings, look inside the fuselage for either laser etched or manually penned circles that represent where you should drill for the center carbanes. Drill these holes out with a manual drill or bit. Install the center carbane but do NOT attach the wing top, then install the outer struts and tighten, and true. Finally affix the wing to the center carbane. True again.
- You may want to CAREFULLY remove a small bit of wood material around the lower wing hold down screw to permit full range servo & wire travel. Not a biggie, but worth doing to improve the roll rates. Use a longer servo arm too.
- Mount the battery inside the fuselage so as to offset lateral imbalance. e.g. mount the battery opposite the engine head or muffler, to avoid having to add weight to the wing tips.


I have several of these planes a couple of which obtained over 100 flights this past season alone.
One particular plane sustained one end over end cartwheels across the field (and flew again immediately), a landing hard enough to collapse the gear, a ripped out wing support (and I didn't know about it so I flew it again immediately), the loss of ailerons (I was able to bring it down w/o damage!), and two hard nose in landings, yet in each case the plane was in the air the next day or sooner.

Several flyers were so impressed after seeing the cartwheels, that they came and asked for more information on the plane as they wanted something as "sturdy as that".


Thus far the Nitroplanes staff has been very good with me and others here at dealing with problems and issues, even spare parts.

Since they do support primarily by e-mail you need "PATIENCE" when you have a problem.

E-mail them, wait, then e-mail them again after a day or two w/o a response. The people who respond may just be away for a while and will be swamped when they get back.... that's my $02 worth.