Building Instructions; Exhaust Nozzle; Stabiliser - Carf-Models Ultra Flash Instruction Manual

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Table Of Contents

Table of Contents

Exhaust Nozzle

The fibreglass exhaust nozzle is completely painted, fin-

ished and trimmed for you at the factory. It is secured to

the fuselage at the top using an M3 x 6mm button-head

bolt that slides into a slot you must file in the exhaust noz-

zle, and 2 sheetmetal screws at the bottom that are

screwed into plywood plates glued in side the exhaust noz-

zle. You can remove the exhaust nozzle through the stab

opening in the bottom of the fuselage, without having to

remove the thrust tube.

Glue a small piece of the 3mm x 12mm plywood strip

inside the top of the fuselage, as shown. Drill a 2.5mm Ø

hole thru the fuselage into the plywood, and screw in an

M3 button-head bolt, leaving about 1.5mm between the

head and the fibreglass. With a small flat file, cut a 3mm

wide slot in the top edge of the exhaust nozzle that will

slide tightly over the thread of the bolt. Screw bolt in until it

just touches the inside if the exhaust nozzle. After final

adjustment, secure the bolt with a drop of thin CA.

Firmly tape the exhaust nozzle exactly in final position, and

drill 2 holes (2mm Ø) from the inside of the fuselage ,

using a long drill, for the Ø2.9 x 13mm sheetmetal screws.

Glue another 2 small ply plates on the inside of the

exhaust nozzle for the screws to go into, using thick CA.

Redrill holes thru' the plywood plates, and then secure with

the 2 screws.

There are several times when an extra-long drill bit is use-

ful during the assembly, and these can easily be made by

gluing a drill bit into a length of brass tube with thick CA.

Stabiliser

The stabiliser is 99% factory-completed. It is held to the fuselage with a 10mm diameter car-

bon pin at the front, and two M4 x 30 bolts at the back, which screw into two steel insert-nuts

which have been bonded into the fuselage at the factory. Alignment and incidence is pre-set.

The dual phenolic elevator horns are also jig-installed for you.

Servo Choice: Because of the thickness of the stabiliser profile you cannot use any servo that

is more than 19mm thick. The servo fixing system was designed specifically for the

JR/Graupner 8321, 8311, 8411 servos and we highly recommend that you fit these.

The 2 stab servos are secured to the CNC milled composite servo hatches using aluminium

angles and bolts supplied. Check the fit of both servo hatches in the moulded recesses in the