Seagull Ultimate Bi-Plane 90 ARF RC Airplane

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Price: $199.99    

Product Description

Looking to put a great-looking biplane through some heavy 3D paces?

Seagull Ultimate Bi-Plane 90 ARF RC Airplane Review

The good:
*High, high quality all around.
*The Ultra-Cote finish was perfect, with no goofs or bagging anywhere; and it's much
prettier in person than it is in the pictures.
*There are all sorts of thoughtful touches that ensure a fast, accurate build. E.g. cut
-outs for either standard or HD switch jacks, servo trays are pre-cut
and perfectly sized for most standard servos, all screw and bolt holes are pre-drilled
and perfectly located. You almost can't make a mistake building this plane.
*Virtually everything is screwed or bolted together. The only glued-on (or rather epoxied
-on) parts were the vertical and horizontal stabilizers.
*I like the way they beefed up the vertical stab with supporting rods.
*This was by far the best, easiest build I've ever experienced.

The bad:
*Instructions were mediocre at best.
*Of course, the included spinner was junk. That's usually the case with any ARF.
*I added two more CA hinges to each aileron (the original three just didn't seem like
enough).
*I used heavier control rods for the aileron to aileron linkage.
*The straight-ahead engine mount is a very bad idea. You need at least 2 degrees of
right thrust if you don't want the model veering left on the verticals (no down thrust
is required, however). Why didn't they build this in at the factory??
*Keep the CG forward. The book recommends 12.5-15 cm from the top wing LE. I recommend
12.5 cm max. Even at that, it feels tail heavy.
*Keep the control throws to a minimum. Even the low rates shown in the book are too wild
for my tastes.
*The plane builds heavy - 10.5 pounds for mine. IMHO that's too heavy for the wing area.
Look for ways to cut weight; E.g.
o Lose the wheel pants (saves three oz right off the bat).
o Go for a lighter weight tail wheel assembly (saves another ounce).
o Consider losing the pilot (saves up to two more ounces).
o Use a light-weight throttle servo (saves another ounce).
o Consider a carbon fiber main gear and wing tubes (another six ounces potentially,
between the two).
o Find a few other little things and total weight savings can be as much as a pound.
You'll like the difference that makes in the air.
*Go for a big engine. I used the new O.S. 155 4-cycle with a 16x10 prop.

Other comments:
*It wants to roll out of knife edge flight; you gotta hold aileron. This is probably its
most annoying habit. But it still does a decent four-point roll.
*It has a slight tendency to want to pull up out of vertical dives.
*The elevator is touchy - esp. when inverted (a sign of a tail-heavy model).
*But on the other hand, you can do slow, graceful rolls with virtually no elevator input.
*It doesn't hold its heading through loops and Cuban eights as well as I'd like; but I
guess that's just the nature of biplanes.

This is definitely NOT a beginner's plane, but it flies well, and even gracefully, with conservative throws. And when all is said and done, this is a beautiful, beautiful airplane. It'll always be a big hit at any field.

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