Model updates

As I proof read the revamped website I find that I promised to update the reviews as the models progressed. Some have died some have progressed so please read on.

Funtana 90S



The aileron servos were upgraded to JR 8411's and the elevator servos to JR 8231's. Until you fly a model with these type of servos it is hard to appreciate the difference they make. The roll rate is astounding but still with the ability to stop precisely, I was in the past sceptical of the value of these expensive servos, but the performance says they are worth it.

Not done any improvements to the canopy. Nor completed my "C" test, although I did use the Funtana to take my BMFA examiners test. I actually had to tune the controls down using only 30% rates to fly the test smoothly.

I plan at some time soon to try flying it on 12 cells, watch this space.


Ultimate 300-100

Indoor models have a very limited life especially when flying in the small space of Chosen Hill School. However the Ultimate survived until January of this year when it finally met with a fatal mid air.


Big Bubble.

The Big Bubble is still flying as superbly as it always has. The JR 600 receiver has been replaced with a Spektrum AR6100 DSM2 2.4 Ghz receiver. Many members have now flown this model all not wanting to give it back. Sadly the kit seems to no longer be available. Will have to enquire further.


Great Planes Turmoil

The Turmoil still hangs on the wall awaiting a few small repairs. Will be out flying again soon.


Mini Byp Yak

The Mini Byp Yak (at least I've now got the name right) started out as an attempt to build a smaller version of the of the E-flight model (above) for use indoors. I had flown big model in Chosen Hill School but found it to large and heavy for the size of hall.

In fact it was to became a series of models starting of with version one (top right & right), this was featured in the initial write up. This was with hind sight probably the best version although a little fast flying. This version had the best spin and torque roll characteristics of the whole series.

Version two (right) had a elliptical wing plan form and off set struts to add drag. This model knife edged well but lost the spin characteristic for some reason I never fitted an undercarriage which was to cause a lot of damage.

Version three (below & below right) was the same as version one with the addition of the brakes between the ailerons. These helped it fly slower but again spoilt the spin and torque roll characteristics.

With our move in the autumn to larger hall I'm not sure if this is the end of the line for the Mini Byp Yak models. I may have to try another though as I now have some even smaller radio gear that needs to be tried out.


Avicraft Panic Biplane.

The Panic Bipe has undergone quite a dramatic change.

I have been experimenting with contra-rotating propellers/motors to produce a torque less set up for prop hanging. I assembled this twin Hacker based unit last year (2007). It was tested in another airframe which proved too small for the weight of LiPo's used. I have since been looking for a suitable airframe.

The set up uses two times (Hacker A30-M 16 with a X-40 OPTO-Pro controller with power from Litestorm 3700 3S1P LiPo's). The motors are running on a single shaft with the rear motor turning the front prop and the rear prop attached directly to the outer case of the front motor. The new power set up worked fine with ample power but does need a bit of tuning as does the model. The sound it makes is very distinctive, and a bit of a contrast from the IC versions. I really must send more time flying this model and see if I can get over my previously expressed dislike of the Panic Bipe  

Above, more Panic Bipe's have appeared at the field the above quartet coming out in Feb 08.

The white/green model in the front is an original Circa 1990. The other three are new (I think).

Above right & right, Mark Burnham's IC version, sorry I have no further details on this.



Gloucester Model Flying Club