In building your Ultra Stick .40s do you find that you need any nose weight with a .46 size motor?

I have run into just the opposite. I am running a Saito 50 up front and was horribly nose heavy. I cut a hatch as far back in the bottom of the fuselage as i could and put my battery pack back there. I wanted it to be a little tail heavy though. With all that said the airplane fly's great. With the flaps and everything else it is a blast.

Make sure you reinforce the firewall and the landng gear though with some extra glue. I personally don't have any bad experiences with the firewall but did need to put more glue in the landing gear department if you know what i mean....

May the wind always be light and variable and all your landings be good ones....

Dan

I have a saito .72 on mine,changed tanks to a sullivan flex 12oz,since the 8 oz sprain a leak arround the neck. I have 15 quarters and 1 nickle on the tail of mine,thinking of putting glass filled mount on nose and buying a soda with the change

I have an Enya 60 bored out to a 80. It weighs 15 ozs without a muffler. I figure if Hangar 9 is pimping the MDS .58 my Enya couldn't be that much bigger. How does the crow work with the .72 on it? Doesn't the .72 weigh something like 17ozs? I've was going to wait until I had the "model money" up for another engine but the Enya is just sitting there begging to go verticle!
Here it is on the front of a GP Big Stik .40 (deceased).

I have a MDS .58 in mine and it has unlimited vertical and will hover at about 2/3 throttle. My MDS spins an APC 13X4 at 10,400 RPM and is actually running very well!? I also used a very light Brisson pitts style muffler, 2 ounces less than the stock muffler and a Goldberg nylon engine mount instead of the heavy, breakable, metal mount. Even then I had to put my 1500 mah battery pack as far back in the tail as I could and add an ounce of lead by the tailwheel to get a 4 inches back from the LE CG.

I now have 10 flights on my US 40 and it is the funnest airplane I have. I love the crow mode! It's pretty cool to come screaming down the runway at full throttle with crow mode active, pull back the throttle, and watch the airplane stop and gently settle in for a perfect landing!

My only complaint is I cannot get mine to knife edge. And I too had the supplied fuel tank split and fill my airplane with fuel.

I think the US 40 is just about the best $130.00 model out there!

Cheers!

Galen

I replaced the metal motor mount with a fiberglass one and have the motor as close to the firewall as posible. I know the .80 is a bit much but it's all I have on hand and it's a sweet motor.

I also replaced the tank, reinforced the dowel receiver by adding a piece of wood behind the hole (drilled the same way) so that the dowels have a deeper hole to live in and not be able to wiggle around. I have liberally put epoxy everywhere possible and fuel proofed the fuel tank chamber. i reinforced the firewall from the inside and I think I will toothpick the firewall as well as the front mounts for the wing dowls (and probably the back). I also fiberglassed the wing as well as adding a sweet dark blue checkerboard to the whole bottom of the plane.

No extra weight needed with the OS 46, 50, or older style 50 FSR ABC. We're flying two US40s (for dual-ing crow landings and stupid fun) - one with the new OS 50 and the other with the older OS 50 FSR ABC....both run great with unlimited vertical. It sounds like you've made decent mods....I'd beef up the landing gear block as well.

So no extra weight needed...tail or nose with the standard size 2-strokes mentioned above. We do have 2400 mah batteries right infront of the CG, but even with a smaller battery, you should have no problem.

-Juhan

Have a Saito .72 up front, well, sorta anyway...guess I'm in the market for a new Motor Mount...yep, mine decided it was supposed to be a two-piece mount!

And yes, mine was nose-heavy, so which LIGHTER mount should I be looking at?

Jerry

That's strange. My 120 Ultra Stick will go into and hold a knife edge with very little coaxing. I thought the 40 version was virtually identical in miniature. Are you sure you have the rudder throw maxed out?

I have tried KE with several different amounts of rudder throw without success. My entry is to pitch up a little, roll 90 degrees, and apply rudder. As soon as I start to apply rudder my US 40 simply rolls out. If I try to cross control it pitches up and rolls out anyway. There is very stong roll coupling with rudder on the US 40's that I have flown. My wing is perfectly flat, maybe I should have tried anheadral ala Ed Moorman's sticks in his R/C Report column...

Am I doing something wrong?

Cheers!

Galen

Hi Jerry,

When I built my US 40 I filled in the existing holes with 3/16 dowels, after using the supplied mount to mark some layout lines. Then I mounted a Goldberg universal nylon mount into new holes. The medium Sig mount would work well too. If you don't want to drill and fill the firewall then a Great Planes medium adjustable mount works. You will have to use the old mount as a pattern to drill holes in the Great Planes mount.

Cheers!

Galen