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ManualsBrandsGreat Planes ManualsAir equipmentUltra Sport 1000 Kit - GPMA0425

DECISIONS YOU MUST MAKE NOW

ENGINE, MOUNT, AND SPINNER SELECTION

The recommended engine size range is as follows:

90 - 1 50 cubic inch displacement 2-cycle

1.20 -1.60 cubic inch displacement 4-cycle

The complete "ENGINE APPLICATION TABLE" is printed on the fuselage plan A portion of that table is

reprinted here to help in your selection of engine, propeller, mount and spinner.

COMPONENTS RECOMMENDED FOR THE ULTRA SPORT 1000:

ENGINE PROP

OS 120 SURPASS SP* 16x8

SUPERTIGRE 2500 16x10

OS 120 SURPASS II 15x8

OS108FSR 15x8

OS 160 TWIN 15x10

* Supercharged version

ENGINE MOUNT

J-TECJT-120SP(SV)**

J-TECJT-ST125(SV)**

J-TECJT-122(SV)**

J-TECJT-M108(SV)**

Mount incl w/ engine

SPINNER

2-3/4"

** "SV" denotes the rubber-cushioned version of this mount, which is recommended.

The above components you select will determine how you build the fuselage, so it is important that

you have these components close at hand while building

MUFFLER SELECTION FOR SUPERTIGRE 2500

If you are using the Supertigre 2500 engine, you have two muffler choices One is the standard

SuperTigre "S 3000" silencer that is made for this engine, and which is outlined on the plans If you prefer a

more conventional style muffler, you may choose the J-TEC "JT-3000S" muffler which was custom made as

a result of this project (it is pictured in an Ultra-Sport 1000 on the cover of the April, 1992 issue of R/C

Modeler magazine) Both mufflers work well, but they are very different styles (See the photos on page 43)

LANDING GEAR CONFIGURATION

The Ultra-Sport 1000 may be built with a

"taildragger" or "tricycle" landing gear

configuration, and a retractable main gear may be

installed if you want to really "clean up' this airplane

for ultra-smooth and precise aerobatics.

The Ultra-Sport 1000 was not designed to

accommodate a nose gear retract, therefore if you

want retracts, you'll have to use the "taildragger"

configuration

You have a few choices regarding retracts,

and you should read the following before selecting

the retracts to be used in your plane.

experienced breakage in a couple of instances

involving moderately hard landings

2. The Robart company has indicated that the

following pneumatic retract system will work for

airplanes up to 12 lbs using stock wire struts,

but that the Robostruts should be used for

planes over 12 lbs Listed here are the Robart

items needed for the complete system #606

Retracts, #650 Robostruts, #188 Air control kit,

#190 Quick disconnects, #189 Airline

restricters, #164G Pump w/ gauge, #170 Air

line retainers

3. At the date of this writing, Robart has also

indicated that they will have new heavy-duty

mechanical retracts with 3/16" wire struts

available for this airplane These retracts,

although not tested in the US1000, may be

ideal for this airplane you may want to check

with your hobby dealer regarding the availability

of these retracts.

1. The retracts shown in this book are B&D 90-

degree 2-gear mains These units are

mechanical and are supplied with 5/32" wire

struts which are not considered strong enough

for this airplane, therefore, this kit includes

3/16" wire struts which you may install in the

B&D retract units by drilling them out Although

this system has worked reliably for us. we have