MegaTech R/C Real World Helicopter Series Uživatelský manuál stáhnout pdf (Strana 34)

SIG MFG. SDMETHIN' EXTRA

The Somethin' Extra comes with a four-piece

motor mount, but the Saito FA-S6 only required

the use of the two beam pieces. I installed the

engine upright and then fitted it with a Master

Airscrew prop and a Tru-Turn spinner.

Though the kit includes a white plastic

spinner, I chose to use a 2 1/4-inch aluminum

Tru-Turn spinner instead.

RADIO INSTALLATION

I mounted three JR NKS-53 7 standard

servos on the factory-installed servo tray,

and using the hardware provided, made

up the rudder and elevator pushrods and

the throttle cable. The pushrod and

cable tubes were already installed in the

fuselage, as was an internal receiver

antenna tube, which exited the bottom

rear of the fuselage.

I wrapped the receiver in foam and

mounted it in front of the servos on the

servo tray. I then wrapped the receiver bat-

tery in foam and placed it beneath the servo

tray. The CG came out 3/d inches behind

the leading edge of the wing, as the instruc-

tions recommended. I centered the ailerons

using the gauge provided, and following the

instructions, I set the high and low travel

amounts for all of the control surfaces. The

Somethin' Extra can be flown with a

4-channel radio and 5 servos, but I chose to

use an 8-channel JR computer radio so that

I could set up the ailerons on independent

channels and use them as flaperons. This

also provided me with elevator-flap mixing

for more aggressive maneuvers. Last, I

applied the "Somethin' Extra" decal to the

top of the left wing.

CONCLUSION

I found Sig's Somethin' Extra to be a well-

made ARF that went together easily and

had a pleasing appearance when completed.

The folks at Sig did a fine job on this one;

they incorporated a lot of little things that

make it very builder-friendly. I was eager to

check out the plane's flying characteristics,

and I was not disappointed. 1 liked every-

thing about this one! ±

I installed all of the radio gear by following the

instructions, and the CG came out exactly as

recommended. The removable canopy hatch

comes already in place on the fuselage; remov-

ing it is simply a matter of sliding it forward at

the front and lifting it up.

The Sig Somethin' Extra comes nearly complete

and with everything you see here. Note the

excellent Oracover covering; it's also available

in a bright red and white color scheme.

Horizon Hobby Inc., 4105 Ficldstoiw Ril.,

Champaign, II. 61X22; (H(X» 338-4639;

fax (217) 355-1552; www.horiy.onliobby.com.

JR; distributed by Hori/.on Hobby Inc.

Master Airscrew; distributed by Windsor

Propeller Co., P.O. Box 250, Runcho Cordova,

CA 95741-0250; (916) 631-8385;

fax (916) 631-8386; www.niasterairscrew.com.

Red Max; a division ofl'HS Supply Inc.,

244 Bethel Hill Rd., P.O. Box 9, Clover, SC 29710;

(800) 742-8484; fax (803) 222-7285;

www.mcmbers.aol.com/l'HSoil/RedMax.html.

Saito; distributed by Horizon Hobby Inc.

Sig Mfg. Co. Inc., P.O. Box 520, Montezunia,

1A 50171; (800) 247-5008; (515) 623-5154;

fax (515) 623-3922; wwwsigmfg.com.

Tru-Turn; distributed by Romeo Mfg.,

P.O. Box 836, South Houston, TX 77587; (713) 943-

1867; fax (713) 943-7630; www.tru-turn.com.

Williams Bros., 1119 Los Olivos Aw., Unit #3,

Los Osos, CA 93402; (805) 534-1307;

fax (805) 534-1366; www.williamsbrosinc.com.

Zap Glue, 9420 Santa Anita Ave., Rancho

Cucamongu, CA 91730; www.zapglue.com.

Before the first flight, I set the control settings at the low rates

specified in the instructions, and after checking out the controls, I

ran a full tank of fuel through the new Saito engine. I then taxied

around a bit to see how the Somethin' Extra handles on the

ground, and there were no problems; control is positive on the

ground with no bad habits and no tendency to nose over.

TAKEOFF AND LANDING

I turned the Somethin' Extra directly into the wind and advanced

the throttle smoothly. It takes off in very little space and gains

altitude quickly. With just a touch of down-trim, the Somethin'

Extra flies straight and level.

Landing the Somethin' Extra is also super easy. Without

using the flaperons, approach the end of the runway with a little

power on the engine to maintain a moderate speed and simply

fly the model right down to flare height for smooth wheel land-

ings. Using the flaperons will produce similar results but at a

much slower speed and with significantly more accuracy.

LOW-SPEED PERFORMANCE

The plane flies safely at low speed without much reduction in con-

trol response. To stall it, the Somethin' Extra has to be slowed

almost to a stop. Obviously, you always want to take your plane to a

safe altitude before you check its stall characteristics because every

model behaves differently. The thickness of the Somethin' Extra's

wing allows it to slow way down as long as you have power but

does not allow it to penetrate very well in high-wind, dead-stick con-

ditions. If the engine quits, get the nose down and the speed up.

HIGH-SPEED PERFORMANCE

Powered with the Saito FA-56 engine, the Somethin' Extra flies at a

respectable speed, but it isn't a bullet. It tracks well at all speeds

with no tendency to tip-stall. The Somethin' Extra's high-speed flight

characteristics can best be described as smooth and predictable.

AEROBATICS

At low rate, the Somethin' Extra is as sedate as a trainer, but

when I switch it to high rate, it's an altogether different airplane.

This plane will perform maneuvers that are not even named yet.

Its roll rate is almost too fast to count, and its snap rolls are

crisp and nearly violent. It enters upright or inverted spins easily,

and recovery is instantaneous when the controls are released. It

will knife-edge forever and does a tumbling act that's hard to

describe. I really have a blast flying this one!

46 MDDEL AIRPLANE NEWS

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