Quiet & electric flight international september 2015

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Flight Quiet&Electric

22 PAGES

September 2015

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International

OF REVIEWS

Tested by us so they work for you!

DIY KIT BRUSHLESS MOTOR BUILD

FPV: HEXATRON AND SPY HAWK

SPORTY SEAWIND DYNAM'S AMPHIBIAN TESTED BOUNCER

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Build this 1830 mm Defiant Mk.1 from Chris Golds' plans

Issue 163

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Yeti Flying Wing tested

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Flight INSIDE... Quiet&Electric

International

September 2015 • Issue 163

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COVER FREE PLAN INSIDE - WORTH £11.99 BOUNCER

Flight Quiet&Electric

22 PAGES

September 2015

www.qefimagazine.com

International

OF REVIEWS

Tested by us so they work for you!

DIY KIT BRUSHLESS MOTOR BUILD

FPV: HEXATRON AND SPY HAWK

SPORTY SEAWIND

Issue 163

£4.25 •

DYNAM'S AMPHIBIAN TESTED BOUNCER

FREE PLAN inside

Build this 1830 mm Defiant Mk.1 from Chris Golds' plans

Cover_SEP15.indd 1

Yeti Flying Wing tested

4/8/15 11:01:41

This month’s cover sees this sport-scale Seawind amphibian from Dynam on the water. Turn to page 14 for the full review. (Tony King photo)

Cover Story

FEATURES 26 58

Brushless Motor Kits John Rutter introduces us to another type of brushless motor assembly from commercially available kits for those who like a bit of DIY

Boulton Paul Defiant Mk.1 Designed and rescaled by Chris Golds, you can now build this 72" span semi-scale British WWII interceptor fighter for a 1400 Watt brushless outrunner and 6-function R/C

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Plan

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FREE PLAN

REGULARS

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Bouncer Your FREE pullout plan this month is an easy to build 48" span vintage-style parasol-wing trainer for 150 Watt brushless motors and 3-function R/C, designed by John Anthony Blakey

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Plan

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58 REVIEWS

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Seawind ARF

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Yeti Electric Wing

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Plug-In Editorial, plus news, views and comments

Marketplace The latest electric flight and gliding products

Scale Soaring This month Chris is out and about again in Somerset at two major fly-ins of the year and reunites with Cliff Charlesworth, plus some Taranis programming tips

Light Fantastic Chris Golds begins this month with a tale of a Horten ‘heart-stopper’, and reveals more of your models

Watts Under The Roof John Stennard is our regular indoor flying columnist, and this month he recalls his visit to a popular ‘all arenas’ models show and some useful tips on micro model repairs

Over There In his regular column from the US, this time Mike Lee reports on an electric scale event in Southern California, and also of the 22nd International HLG event for some discus action!

Dairy Dates Where to go and what to see!

Down Under Our regular reporter Peter Pine reports on the Electric Old Timer models that were well represented at the 2015 Australian National Electric Flight Rally

Classified Adverts Our regular FREE 'For Sale' section

Web Directory Shop online for your modelling needs

Shoppers Directory Where to find your modelling needs

Coming Next Issue What to see in the September 2015 issue of Q&EFI

Tony King assesses this 1220 mm span electric powered, foamie amphibian from Dynam that has superb handling characteristics off water and in the air

Adventurous Tony King assembles this rugged electricpowered flying wing from 4-Max and puts it to the test ready for some combat sessions!

Spy Hawk FPV John Stennard applies his hand to this latest version of the low cost, popular FPV electric glider model from Hubsan and he claims it to be a very capable model!

Sopwith Pup RTF With a fondness of classic aircraft Matthew Boddington tests this latest 352 mm span Ultra Micro ‘Vintage Series’ WWI fighter from Ares

Multicopter Hexatron FPV Revell Control’s large RTF 6-blade multi-rotor comes complete will everything you need to fly, so we asked Jake Robinson to test it and pass on some tips

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Is it a boat or is it a plane? Tony King takes to land and water to test this 1220 mm span re-scaled all-foam model from Dynam

SEAWIND ARF

A State-of-the-Art Plane

My latest review is a very accurate reproduction of the full size ‘Seawind 300C’ manufactured exclusively by Seawind LLC., based in Quebec, Canada. It is claimed to be the fastest true amphibious aircraft in the world, capable of taking off from both land and water, powered by a Continental IO-550-N engine producing 310 hp and capable of speeds up to 322 kph (that’s just over 200 mph). The Seawind is most distinctive for its engine pod that juts forward from the

Colourful box art

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leading edge of the very large vertical fin. The design is also noted for its long, low profile and sleek curves made practical by composite construction. The Seawind is relatively quiet for the crew, primarily because the engine is above and behind the cabin and the exhaust is routed up and aft. Some amphibian aircraft use a pusher propeller arrangement that causes the exhaust to pass through the propeller plane, which can increase noise. The Seawind uses a conventional tractor propeller arrangement that avoids this issue.

The Model Assembly

It never ceases to amaze me as to the endless possibilities of EPO foam. Construction shapes that would involve a lot of building by conventional methods are all in the past with modern moulding methods

‘there is very little to do before it is flight ready’

Plentiful quality parts included

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Model Review

Wingtip float is attached with UHU-por glue

Underside of wing showing aileron position and access hatch

Factory-installed Detrum outrunner motor is housed inside the moulded plastic removable cowl

Stabiliser fitting with pins to hold, also shows top fin recess

using EPO foam; the smooth lines on this model are very pleasing to the eye. So let’s start with the wing: this is moulded in one piece with pre-installed carbon brace. There are two drooped wingtip float/ stabilisers that provide some endplate effect to increase ground effect and reduce induced drag. These need to be secured into place with a good foam friendly waterproof contact adhesive, such as UHUpor. Two 9 g servos are fitted into the wings to operate the ailerons. These terminate to a Y-lead, which is supplied. The control linkage is pre-fitted to the ailerons but will

Interior layout shows battery position for C of G

probably require adjustment when setting up your radio. If you find it necessary to remove the servo covers for any reason then please ensure that when these are refitted you apply a little silicon sealer to stop water ingress from the front of the covers. As this is an ARF kit there is very little to do before it is flight ready apart from fitting the stabiliser and installing the receiver and battery. For my installation I used a JR921 receiver with a satellite receiver. The LiPo battery used (not supplied) was a 3S 2200 mA 30C. The supplied and installed speed controller is rated at 40 Amps.

You will have to install the small water rudder and connect up the elevator/rudder linkage after fixing the horizontal stabiliser into place. For this I used 30 minute epoxy adhesive, as a precaution I inserted a couple of T-pins through the foam into the stabiliser to hold it in place whilst the epoxy set. (Be sure to check the diagonal measurements are equal between the stabiliser tips to the wingtips.) Finally, epoxy the small vertical fin into place. The water rudder does appear to be a bit on the small size and I suspect will not be very effective – maybe the flight testing will prove me wrong?

The water rudder

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