|One of the earliest exponents of Galloping Ghost in the UK was Terry Tippet of Micron fame, and this is his original home-built Gallatrol GG set, kindly donated to the cause. Terry was a true GG enthusiast, in fact, as a youngster, I flew with him a few times at our club slope-soaring site - Terry had a 'Wizard of Oz' glider, with rudder & elevator, whilst we were all on rudder-only escapements!
Notice the open-gimbal stick - which still feels really smooth after 45 years! The knobs above and to the right are trims - a luxury at the time!
In a powered model, the two buttons gave full tone and no tone respectively, causing the actuator to rotate fully, progressively nudging the throttle open or closed. The buttons were unused in a glider.
|Heres a close-up of the receiver and switcher. Some used a relay to drive the GG actuator, others used a transistor half-bridge with the battery-side of the actuator to the centre-tap of a nicd pack, whilst the relay or bridge alternately connected the other side of the actuator to pos or neg, hence causing the to-&-fro motion typical of Galloping Ghost. The Gallatrol went one step further, having a full bridge, which gave full battery voltage across the motor in both directions.|
|Shauns Galloping Ghost demonstration rig. Note the Rand actuator driving rudder, elevator and throttle!|
|Shauns Fleet Galloping Ghost transmitter, receiver and Rand actuator. Maybe not aesthetically perfect but beauty as ever, is in the eye of the beholder...
When this arrived it didnt work - every transistor had fallen out of the board where the legs had been corroded by acid flux! Hours of careful rebuilding resulted in a working set, which can be heard in action here on my FRG7700 comms receiver.
|Another Fleet Galloping Ghost transmitter, note the side-mounted trims|
|The complete Fleet Galloping Ghost outfit - tx, rx battery box and Rand LR3|
|A Rand LR3 Galloping Ghost actuator, boxed with instructions (on the archive page).|
|Shauns Macgregor Galloping Ghost transmitter.|
|Shauns Mattel Pulse-proportional set with magnetic actuator. A Pulse-Propo transmitter alternated quickly between full left and full right signals, and the stick variably 'biassed' the ratio of left to right such that the actuator followed the stick fairly accurately.
Galloping Ghost was an extension to this principle, using a change of pulse rate for elevator as well as a change of mark-space ratio for rudder.
|Shauns home-made Galloping Ghost actuator. Notice the spring-bias to centre. These would rapidly twitch back and forth, really fast for down elevator and a little slower for up. It works, of course!|
|About this time the first true proportional systems started to appear, but they were hideously expensive.
At the entry level, a kind of stepping-stone to 'Full House' systems, came a crop of "One plus One" sets which had truly proportional rudder, and either a progressive or sequential throttle. Here is a Gem 1+1, manufactured by Mainstream and distributed by Ripmax.
|And inside the Gem, very compact. Note that the stick pot is concealed under the PCB.|
|Here is the Macgregor 1+1, very similar in operation to the Gem, but with a better reputation for reliability.|
|And the Waltron 1+1, with the benefit of rudder trim, a new innovation!
The 1+1 sets were actually a very pleasant way to fly (they still are!) and tamed many twitchy models with their proportional rudders - prior to this, rudder was bang-bang, all or nothing... the ability to vary the throw in relation to a stick was a revelation!
|Towards the end of the 70s Micron did an innovative kit-build Single Channel proportional set, literally rudder only, which was absolutely ideal for small diesel powered models or for S/C gliders. Terry tells us that less than a hundred units were sold, so finding this one was a really lucky break, especially one in such good cosmetic condition - inside is another story! Soon to be resurrected for action down the flying field on 2.4ghz. Pictured alongside Phils Sharkface.|
|Here is an example of a pulsed actuator and a mechanical switcher or pulser,
you can see the copper on one half of the disc, with the other half insulated.
You can also see the wiper tracks on the copper.
Not sure what the others are - a S/C servo and a reed one?
|Here's a PCB mounted Mighty Midget Galloping Ghost actuator. The version on the top row uses a torque-rod and bird-cage at the surfaces, whereas the bottom row shows a pushrod version.
By mounting the motor and receiver on a custom PCB, wiring is kept to a minimum and swapping the whole installation between models becomes a trivial task. This project was featured in RCM&E Sept 68 in Boddos Single Channel Chatter Column. It also allowed Relayless Rx's to be used for Galloping Ghost applications.
He used to have a thing about all in one mounting systems. This one also had a charging socket and a neat pianowite hook on and notches on the PCB for a rubber band to hold the Rx in place on a foam pad.
This unit was designed by Less Rudd, who was better known at the time as the designer of the Go-Jet.
The PCB could accommodate the Rand LR-3, or a Mighty Midget either inline for a torque-rod or at 90 degrees for a pushrod installation.
|This is an ex-DB pulse-propo model, donated by Andrew Boddington, Davids son. We're not entirely sure what its called but it was originally built bt Arthur Fox and bears his trademark logo. The rudder is controlled by an Adams Baby magnetic actuator. For this model I designed a custom pulser which sits inline between a conventional modern rx and the Adams magnetic actuator. Here's a video of the pulse control system driven by Shauns 2.4g Spektrum set, and brief clip of it flying at the MAA do at Flamborough.|
Here's Otto Diefenbach revisiting his youth, flying his new GG model recently.
Otto uses a Tobe GG actuator (a Rand LR3 clone) via one of my GG recoders. The recoder sits in the aircraft between a conventional R/C receiver and the GG actuator, and recreates the exact mark/space and rate information of a period GG system. The combination of the recoder and a Tobe actuator is a means of flying GG exactly as we did in the sixties, but using modern, reliable equipment: