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IMPORTANT WARNING. 

READ THROUGH BEFORE ASSEMBLING OR FLYING YOUR KIT. 

Just as in any full size aircraft, any RIC model aircraft can be made to fail, be it a wing folding or a fuse­

lage breaking under too high a load. Model RIC aircraft have a maximum safe G limit. Because you are 

not in the plane it  is difficult to judge the G during flight, and it is very easy to exceed the limits of the 

aircraft. This is particularly important if you install a turbine larger or more powerful than the power band 

specified for that particular kit. This negates any airframe warranty straight away. 

All our designs are thoroughly test flown before the kit is released for sale. Turbine powered RIC model 

aircraft are  not manufactured to withstand unlimited G forces. When flying your  Boomerang Jet, be 

aware of the  high loads which  can  be in excess of  the airframes capability  to handle.  Respect  the 

airframe as you would when flying a full size aircraft. Fit a turbine only up to the specified power. 

Understand that if you perfonn a snap roll, wall, blender, knife edge loop or any similar manoeuvre, or 

pull hard on the elevator, particularly at high speed, you can over stress the airframe by up to15 G or 

more. At 15 G, the 27 lbs (12.2 Kilo) model effectively weighs over400 lbs (184 kilo), and though it may 

be  for  only  a  few  seconds,  the  strain  on  the  airframe  is  huge.  Your  model  may  survive  those  hard 

manoeuvres  a  few times, but  eventually the cumulative damage  will tell and  airframe  break  up can 

occur. 

It is common practice for any manufacturer not to replace an  airframe  which breaks in the air or upon 

landing. Manufacturers may replace airframes when they have noticed many incidences of the same 

failure and it is detennined that there was a design fault or repeated manufacturing error. If you break 

an airframe, and you are the only one to do so, then it is highly unlikely to be the fault of the manufac­

turer. Fly safely, and avoid full throttle operation other than at low airspeeds. 

RIC model jets are not toys!  If misused, they can cause serious bodily hann and property damage. Fly 

only in open areas, and AMA (Academy of Model Aeronautics) or BMFA (British Model Flying Associa­

tion)  or  your  country's approved flying  sites.  Follow all  manufacturer  instructions  included  with  your 

plane, radio, servo's, batteries and engine. Each kit is guaranteed to be free from defects in both mate­

rial and workmanship at the date of purchase. Warranty does not cover any component assembled by 

the  customer.  All parts of  high stress must be  inspected  and reinforced if necessary by a competent 

builder. 

Some parts should be  examined,  and if necessary,  glued again.  High stress areas such as firewalls, 

motor mounts, wing mounts, landing gear mounts, etc., are areas of high concern. Seek help if neces­

sary. 

In no case shall Boomerang RC Jets, LLC. warranty cover any product which is not manufactured by 

Boomerang  RC  Jets,  LLC.  The  liability  to  the  manufacturer  cannot  exceed  the  original  cost  of  the 

purchased item. 

Further, Boomerang RC Jets, LLC. reserves the right to change or modify this warranty without notice. 

In that Boomerang RC Jets, LLC. has no control over the assembly or materials used by the builder of 

the model during final assembly,  no liability shall be assumed nor accepted for any damage resulting 

from  the  use  of  the  final  user-assembled  product.  By  using  the  user  assembled  product,  the  user 

accepts all  resulting liability. The kits manufacturers have provided you with a top quality, thoroughly 

tested kit and instructions, but ultimately the quality and flying ability of your finished model depends on 

how  you  build  it.  Therefore,  we  cannot  in  any  way  guarantee  the  performance  of  your  completed 

model, and no representations are expressed or implied as to the performance or safety of your com­

pleted model.  It is the use�s responsibility to inspect each component for airworthiness. 

Summary of Contents for Sprint

Page 1: ...hose with insuf ficient building and flying experience This manual is for guidance only If you are unsure of any model building techniques seek help from an experienced model builder or contact Boomerang RC Jets LLC for assistance Jet models are dangerous if construction is carelessly or incorrectly carried out As the building assembly of this kit is out of our control after point of sale no liabi...

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Page 3: ...ilm Not supplied Be sure to glue securely This is Vital for safe flying Apply thin Cyano glue to both sides of hinges to ensure good penetration Typical Servo Mount Flap Servo Installation Drill to suit your servos Not supplied Not supplied 2 6 x12mm TP Screw Cut away covering film For Main Landing Gear 3mm 3mm 3mm Nut 3mm Washer 4 2 6 x12mm TP Screw 1 1 2 1 3 x 50mm Bolt 3mm Nut 3mm Washer 3mm Ho...

Page 4: ...ly turning until the ends are in line Now cut off the excess wire The output hole in the servo arm may have to be drilled out to accommodate the Z bend wire passing through it Adjustment of the pushrod length is carried out by adjusting the clevis along the threaded part of the pushrod An extra pushrod is supplied to allow for possible error Pushrods Cut 90 90 90 5 Flap control Note hinge position...

Page 5: ... off shaded portion The main leg retracts should be fitted about inboard of the centre wing tip 2 2 2 6 Cut off shaded portion 55mm 5 2mm Collar 3 x 4mm grub Screw For Retractable landing gear Not Supplied NOTE Do not fix plastic wheel wells until the servo wires and air lines are in place Level off the surface around the retract units The height of the landing gear should be approximately as foll...

Page 6: ...me way Be sure to apply instant type CA glue to both sides of each hinges low viscosity type Cut away covering film Warning 2 6 x12mm TP Screw Be sure to glue securely This is Vital for safe flying 2 2 8 2 6 x12mm TP Screw 2 2 x 100mm Pushrod 2 Clevis T d n a o a 2 2 4 2 3 x 50mm Bolt 3mm Nut 3mm Washer 3mm Horn 3mm 3mm Nut 3mm Washer 3mm Horn 3 x 50mm Bolt 3mm Apply thin cyano top and bottom and ...

Page 7: ...il end you can use Midi servos for the rudders If you do this make up 6mm 1 4 liteply plates to raise the smaller servos and reduce the standard spacing of the servo mountings supplied Remember to allow for the shrink age of the covering when cutting away for the servo mounts 13 12 Aileron Servo installation Completed Outer wing Assemble left and right sides the same way Assemble left and right si...

Page 8: ...mm 14mm 54mm Completed Apply thin Cyano to the 3 x 50mm Bolt after pushing it through the control surface and immediately tighten the nut to prevent rotation 3mm or 4 40 pushrod and clevises supplied supplied Tailplane Stab Be sure to apply instant type CA glue to both sides of each hinges low viscosity type Cut away covering film Lightly iron the covering through a cloth with a warm iron before c...

Page 9: ...e and immediately tighten the nut to prevent rotation Supplied 3mm or 4 40 pushrods and clevises Supplied 1 2 x 200mm Pushrod 1 Clevis Extension lead 1 5 metres along booms to elevators Right boom shown Adjusting the Carbon Fibre Spars If it is necessary to adjust the fit of the C F spars within the wings apply the Heatshrink supplied to the spars as shown The spars should be snug but not tight Cu...

Page 10: ... 20mm Bolt 3 x 20mm Bolt Decrease size of top exit hole after wires are through to prevent the connector falling inside the fin Self adhesive 4 Self adhesive 1 1 2 5mm Hex Wrench Lock 3 x 10mm Bolt 4 3x10mm Bolt 3x10mm Bolt Wing Top Wing Locking ...

Page 11: ...ose down attitude when Intro is standing on a level surface This will be easily overcome on take off by the elevator authority and will also help to eliminate bounce on landing Not Supplied Not Supplied 2mm Not Supplied 4 2 6 x12mm TP Screw 2 6 x12mm TP Screw Cut away part of the former at the rear of the rails to allow the retract unit steering arms to drop cleanly aft of the retract mounting rai...

Page 12: ...a abd strip off the the film between the marks you have made Now strip the covering carefully from the underside edge only of the fuselage wing seat Before finally gluing the wing to the fuselage drill and inset the alloy dowels to the front of the wing These will slip into the parts No 1007 supplied which should be epoxied to the former using these dowels to adjust their position Drill a 4mm hole...

Page 13: ...floor for this A full tank of fuel weighs anything up to 8 Lbs 4 Kilos and in a negative G manoeuvre can exert consider able upward pull Clean up the front opening of the air intakes as necessary After carefully stripping away covering film from the small cutouts in the supper fuselage use the air intakes as a guide to how much covering to remove from each side of the fuselage opening up the airfl...

Page 14: ...RCE SPRINT 12849 849 849 USAF USAF USAF S P R I NT Boomerang SP RI NT S P R I NT Boomerang SP R I NT Boomerang S PR I N T S PRI N T Trim the hatch latch and if necessary adjust the front peg to achieve a good sliding fit A small smear of grease on the slots alloy buttons will help the hatch to slide easily into place ...

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Page 16: ...irspeeds using slightly open throttle allowing a high angle of attack with virtually no risk of dropping a wing Mix in 10 down elevator with the flap movement to prevent the nose rising as it is applied If you have advanced mixing this should return to zero from half flap to full down flap SPRINT is capable of any aerobatics you care to try including spins both upright and inverted snaps tumbles r...

Page 17: ...so then it is highly unlikely to be the fault of the manufac turer Fly safely and avoid full throttle operation other than at low airspeeds RIC model jets are not toys If misused they can cause serious bodily hann and property damage Fly only in open areas and AMA Academy of Model Aeronautics or BMFA British Model Flying Associa tion or your country s approved flying sites Follow all manufacturer ...

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