October 2009

Wednesday 14th
It would have a quite afternoon if john (Cookie) was not there. Steven flew his Easyglider practicing his landings and landed on the strip once!
Marley worked away at a tiny patch of lift with Phil's Highlight, but by 5.00PM lift was hard to find
James was doing well with his Trex 450 moving it confidently round the strip tail in 

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John flying Steven's Easy Glider

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straight down the middle 

Has your wheel fallen off? It's on the peg board

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Phil's Highlight

 Cookie's battered Balsa model

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Cookie's old Cessna

 Phil doing a wobbly hover with his Twister Storm
Sunday 10th
The afternoon started OK after the rain cleared, but later a breeze started and bounced the models about a little.
Only one heli flown, my Twister Storm, its first outing outside since the spring
Phil

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Derek starting his Northerner and Ken hand  launching it

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Mass start, Ken's Magnatilla got left behind as the light weights shot off

Kevin's Extra leaps into the air

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Jim's Angel 30, went well mostly ignoring the breeze

How do you spell Magnatilla?

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Jon's Edge

Sunday 4th

Warm sunny morning with little or no wind, a south westerly breeze picked up after lunch.

Quite a good turnout, although a few helicopters flew during the day it did seem that fixed wing were in the majority.

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Nick Cooks Kyosho Messerschmitt  Me109 takes to the air, just never a Spitfire about when you need one.

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A rare treat to see the Gloucester 'Skunk works' take on the vintage pair. The orange flying wing is based on the De Havilland Swallow, while the blue twin boom is tribute to the Sea Vixen. In fact the 'Sea Vixen'  has been flying for a few years and has been the test bed for several ducted fan units. Last used to test the Harrier power unit it has now been converted to twin fans.

Both model have exactly the same power set ups. The fans are Phase-3 EDF 3-blade units as used on the Phase 3 Phantom, motors are Hobby-lobby Jet Screamer Fan Out runners with 21mm Adapter. The adapter moves the motor back and into the air stream so it stays cooler. These motors produce 4500 Kv (rpm/volt) and weigh a mere 1-3/4 oz each. On three cells they run in excess of 40,000 rpm, they can be run on four cells taking the rpm into the high 50,000 rpm range.

Power comes from a Flightmax 2200 mAh 3S1P 25C (X-Thin) battery, I quite like these X-Thin cells as they seem to fit better in slim fuselages than the more usual trend towards dumpy 2200 cells. As only three cells are used a Castle Creations Phoenix 25 speed controller is more than adequate for the task.

Each motor has it's own ESC and battery with just one ESC providing the power for the radio. Both models are constructed from Depron and carbon with only slight traces of wood. The Swallow being most recent is a masterpiece of Depron, carbon, Kevlar, glass and polycarbonate moulding.

With both models having exactly the same power trains a test flight to compare performance was needed. Following his 'sacking' from the 'Skunk works' test pilot team due to a 'slight' mishap with the Chairman's Blade XL (see April 2009 blog) Paul Gurr has been replaced by Lee, who was to fly the Sea Vixen.

The performance of both models was very similar, though most agreed that the Swallow was just faster in a straight line but lost speed to the Sea Vixen in the turns. This is pretty much as expected with the drag increasing rapidly on the flying wing as up elevator is introduced in the turn.

Phil was briefed to get a formation shot, but as usual he wasn't paying attention and only managed to get us going in opposite directions.

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Paul G. wants his place on the 'Skunkworks' crew back and spent the day displaying his newly acquired Su-34, which he actually took home in one piece.

George Ford's old and venerable Super 60 was much in contrast to all the heavy metal on display. Or put another way balsa and dope -v- foam and carbon.

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Gloucester Model Flying Club