Phil's News Bits 07.02.09

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Helicopters . An unbiased view about the evil things,
getting on with it, week 5

 Last week I bought a Twister Storm 3D, this came ARTF just the blades and undercarriage to fit. The instruction gave the settings for common transmitters. The one bit that baffled me was the heading hold gyro, this would give full deflection to the tail rotor servo. I checked on the interweb and found this was correct, the gyro is trying to return the heli to its starting position, the stick input from the rudder tells the gyro the rate of yaw required.
One thing worries me, if the gyro was perfect and you had enough power for a 12 hour flight would the heli rotate 180 degrees ?

I have always imagined a piezo gyro like a wobbling jelly, if it is wobbling symmetrically when still, rotating it will alter the the wobble to a new  pattern. The crystal in a solid state gryro vibrates and if you rotate it coriolis force alters the pattern of these vibrations and sensors detect this.
The cheap hovering toys are often fitted with three gyros to make them flyable. All I need is a gyro that will slow the tail down enough to make it flyable but the 3D guys require something fast and accurate to keep the tail steady  while flying backwards at high speed.
Gyros come in two flavours, heading hold and rate, switchable and adjustable from the transmitter

Back to the Twister , this came with all the servos and gyro fitted, a battery , charger both mains and battery, I soon had the blades whizzing round on the floor and getting light on the training under carriage. This is heavy model and not for indoors so I powered down, luckily it was Saturday and I could fly at Bentham. It hovered fine just needing a bit of right trim and made a little less sensitive with the 80% rates and 25% expo.
There are a lot of little plastic parts that look very breakable and the servos look real cheap but at £137 for the older version with HL400 gyro it seems like a bargain. The later model with HL800 Gyro is £187


Indoors at Bentham
No real progress made, just a little more confidence in the hover and a bit of sideways


Photo  My new Twister storm


 snow event scenario situation

Indoor flying

Every Saturday at Bentham Hall 6.00PM till 8.00PM, bar open after.
This venue is open to all with BMFA insurance, spectators welcome, criticism in the manor of Statler and Waldorf   especially welcome

Photos from the 18th session at    

Only twenty this week perhaps many were put off by the cold weather

Photo:- slight friction between the macho heli pilots and the sissies that fly fixed wing.
I had a combat session with Paul's Heli and my depron Pogo last year, I came second


Unlike many UK schools, London transport, most airports and many other major national utilities Glos MFC was not going to stop just because of a little snow. Ignoring warnings of major catastrophe with multiple deaths and injuries caution was thrown to the wind.

With Paul G. announcing that the Holy Cow had a bit of a runny nose and was confined to home to avoid a foot and mouth scare members were able to make their way to Bentham and fly safe in the knowledge that the GMFC committee had considered all the health and safety issues before carrying on with life as usual. As it turn out the roads were clear and the freezing temperatures forecast did not appear.

However as expected numbers were down to twenty, with the majority again "flying" helicopters.

read more



Robotbirds Micro Blade
Last week i flew my Robotbirds EPP  Micro Blade this was powered by a flying wing Himodel motor at 19grams this is a little heavy but cheap at £12, the ailerons use a  9 gram Esky servo witch gives a very sharp  response. The rudder and elevator have cheap 3.7 gram servos and need changing as they are not smooth. The Spektrum 6100E RX is a bit heavy, I used a 450ma 2 cell lipo that is also too heavy for it, 300ma would be better
Not much to do just glue the two fuselage halves to the wings and fit rudder and elevator, the wing is reinforced with two carbon rod and is very stiff for EPP
The wing loading is higher than the normal blade and it flies faster but  it is not so easy to prop hang,  loops are real tight and very sharp 4 points roll are possible. In spite of being a little heavier than I wanted it does fly great in the big hall at Bentham.

Priced at £19.95 it wont break the bank, but the addition of a Spektrum receiver and the rest,  brings the price to over £80

Video links wing fall off an Edge 540, also the full sized wing loss debunked 



 Gloucester  membership form SCSA Membership form the BMFA


For Sale/wanted     email ads to   



 Electric planes for sale all new not flown, complete with all gear . 16.11.2008
  DINGO 49"  PC-9 ROULETTE 50" £150 EACH
Phone Don Jones 01452 531955 for full details

Futaba 6ex, Club 2000, OS75AX 
Hitec HFS-05MS Receivers). 
SEBART SUKHOI, wanted 40 sized trainer




Club meeting 18th February. We were going to watch some Aeorplane DVDs. Unfortunately I can't make the meeting with the equipment, so will postpone the DVD's till March. Instead we will have "bring what you are building" to the February 18th meeting. (Bryan)

A cross country comp is planned Sunday Feb. 22nd, beginners and the nervous will be given help


Slope flying

Friday good lift on Selsley, the Common was very crowded with people enjoying the snow.

Photo:- Snow boarder having fun


I   flew my MiraJ, as usual but first I chucked off a new Chevron wing. Called a Slipstream, itís just one metre span. I bought it because my Zagi and X/R are twisted and wrinkled and donít fly very well any more. I saw Tony fly one at Haresfield, a snip at £28. I had nothing to fly the small bowl at Haresfield, so the Slipstream will fill that gap. It was itís second outing and for some reason or other the neutral trims seemed to have moved a lot, got some bad air and was finding the little beast almost un-flyable. Phil flew it later in better air and did rolling circles amongst the paragliders, just to show performance has something to do with whoís on the sticks.  

There were twelve or more paragliders airborne at one time and several, unfortunately, had no regard for the safety line agreed to keep us apart.  



Bryan: Managed to get back from Hairsfields OK.  Nice breeze, just enough for the 5C Zagi. Nobody about to get a flying shot.
 Also had a go on Minch with the electric. The take off runway had been conveniantly cleared for take off. 
If you got Pauls email, he might be interested. 
Cheers for now. 

Sunday afternoon, Feb 8th, Haresfield  

Calm most places but at least 15mph on the small bowl. I sometimes wonder if this is the windiest spot in Gloucestershire?  

Phenomenal lift for the tiny Slipstream but the odd spot of rain quickly turned into a snow blizzard and impossible visibility. I fled!  

Larger photos at

Last weeks letter 


Events & Shows

This isn't intended to be the definitive list of all the events and shows in the country, just one's that might be of interest to club members


every Saturday till spring Indoor flying Bentham Sports hall
6.00 till 8.00PM, bar open after  GL3 4UD Cheltenham map On Bentham lane no access from  the A417

22nd February 2009  Bring and Buy Sale  will take place at the HDA Sports and Social Club, Cherry Tree Walk, Batchley, Redditch on Sunday from 10am
Feb 22nd SCSA cross country 
22nd March Aston Down club is arranging a coach trip to the RAF museum at Hendon leaving Aston Down Airfield at 08.00,  the total cost is £20 all in. Members of the SCSA are very welcome if they would like to come. Please to contact Doug Garland on 01453 824903.
April 11/12 Aerotow  TVSA  Thatcham 
April 11 & 12th Vintage free flight 
Apr 18-19  South West Model & Hobbies Exhibition

Royal Bath and West Showground, Shepton Mallet, Somerset, BA4 6QN. Contact Hannah Langfield on 0117 907 1000 or

Apr 19  West Mendip SA Open Glider Cross Country Event Crook Peak, Nr Weston-Super-Mare, Somerset. Contact Graham Tolhurst on 07973 163490 or or see
May 16th Thames Valley Model Air Show    Blackbushe M3 Junction 4 or 4a. The local Post Code is GU17 9LQ.
Jun 20-21  Weston Park  Model Show
Jul 4&5 Woodspring 








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