Adrian Smith 1

Yup, been there, done that and wear the tee shirt ☹️. Still it keeps my repairing skills up to scratch!

Love it! Great job, Michael 👍

Thanks, Peter. Interesting. As I say the Rx battery is just just supplying the servos via the switch due to the OPTO nature of the ESC. I am a bit surprised to see this happening only when the ailerons on this particular aerobat are at full deflection. My other 2 large scale a/c using the exact set up (same RX battery too) and don't show anything like the brief large current draw on the RX battery (2s lipo) doing the same flying patterns. But I take you point about access and it may be be nothing worry about. I am going to go through the aileron geometry anyway this week because I am not happy with it and retest. As you say GG, until started playing around with telemetry I was happily ignorant. Now I am more inquisitive and want understand more. It just makes life more interesting for me.

Hi DickW, the wiring from the lipo is what it is. It connects to a switch from 4-Max which is sturdy enough I think and is the same for all my large scale planes. As it's an OPTO setup it only provides power to servos. https://www.4-max.co.uk/gt-electrical-switch-8a.htm I tend to think the evidence from the Telemetry/TX setup points to a servo on or near the stalling point , but I will test it all when I go to workshop this week. Thanks for the input, gents.

Well looking at the two aileron EPAs the RH aileron servo limit up & down is at 135 with actual travel of 115 and 140(!) respectively. The left aileron has a limit of 135 up/down with the travel set at 120 for both. Going to the sub-trim menu the RH aileron is +70 while the LH aileron is at -12. Something definitely not right there. Both servo arms need coming off with servos zeroed and start again. The throws when she was initially set up were supposedly equal, also I can't say I noticed anything untoward in flight either. I think anyway the roll speed can be toned down a bit to make it more scale like because as it is now this is not right.

I have had a look at the servo measurements, GG. The readings indicate a high level of rotation on the two aileron servos (probably non-scale rolling at the time), but with the throttle approaching WOT. The ESC is an OPTO and of course, as normal, there is no throttle servo. So you may have a point GG 👍 Looking at the charting on my two other large scale jobbies and doing the same routines, the most voltage drop is briefly down to 7.9v during the flights. So you are probably correct and I need to look at the EPAs carefully. I am the first to admit my EPAs are quite large (I don't do low rates or EXPO by and large!). Good time to check during the rainy week.

It is worry. I bought one of the last Capiche 50cc off them a year or so ago and I was told they were not going to sell any more" large " kits any more because of the cost of a courier. Also I was told I could only pay over the phone as the website was not up to it. The person I spoke sounded a bit downbeat even then. 🤞 they are still in business.

Trawling through the data on one of my large scale aerobats (Goldwing 91") I was looking at the RX battery and I was horrified at the gyrations during one flight! I am using a 3600 mAh 2S RX battery (12c). At the start of the flight telemetry indicated it was 8.2v (although my lipo tester said nearer 8.4v) which is starting point I expected. However, during the flight it hit 7.5v and then 7.4v! On my other aircraft there is some dips in capacity before recovering, but not this much. Scary. I wonder if the battery is nearing its useful life, although the discharge rate on both cells at the end of the flight are the same. It's got me thinking though ......

A one day weather reprieve in Suffolk today with almost perfect flying conditions. Best make the most of it. Like you leccyflyer I decided to squeeze one more session in because if the met office is correct this week is mostly rain and wind and hanger time beckons. The Goldwing Slick 91" came out and although the CoG is slightly rearward a great deal of fun was had with flat and inverted spins. This after the pilot got the de-misters working before starting engines!

A lovely picture there LF!

It was joy to be out this sunny, calm morning and was even joined for a while by an inquisitive Buzzard flying nearby. I was looking for a low stress morning, but on the last landing (of 5) on the run along the grass strip back to the pilot box I inadvertently, through lack of brief concentration, I had the throttle speed a little faster than I should and leant on the elevator! The plane's nose lifted up searching for the angels and was about to stall just as I was able to let go of the elevator and do a WOT emergency measure. I was glad I had the foresight the fit a larger prop (27x10 changed from 26x10) a few weeks ago and she duly took off like a rocket with plenty of power! Strangely enough out of all the morning's landings this last one was the best after going round again to calm down. Anyway back down safe to fly another day. 😃

Excuse my ignorance, John but I have no clue as to what a stabilised RX with a satellite RX. I have a Futaba 16SZ TX and am I right in thinking the usual Futaba FASST RXs don't do what you want or is it just a matter of cost? I am a bit conservative I know, but why possibly risk compatibility with something that is not Futaba when IMHO Futaba kit is bullet proof as many years of my use has proved?

Nice looking model, Learner. Hope she flies as good as she looks 👍

I decided on a bit of experimentation on prop sizes this morning on my SW 91" Edge. I had previously added a current sensor on this aircraft just to tell me what I thought would be the case, but nevertheless no harm in confirming it. The setup is 12S with two 5800 mAh power packs in series. This morning was a nice dry one with a 10 mph slight crosswind down the strip. The two props were, starting with a 26x10 followed by the 27x10. The first observation was the safe duration (for me anyway) of the flights with the larger prop was reduced by about a minute. Quite a bit for electric flying. The first chart is the 26x10 prop while second is 27x10. Apart from one spike at the start of the 26x10 flight the spikes on the 27x10, flights are more consistently over 100amps compared to the 26x10 prop for roughly the same freestyle patterns ( not an exact science I know). The motor is a Dualsky GA8000 which I have probably mentioned before. What does that tell me? Not a considerable lot but at least I can plot exactly what is happening and make me more aware of throttle control and how to be economical with it. Also it tells me I have plenty of head room with a 200A ESC and it's good to see these readings in the air. A couple of happy snappies to finish with! 😀

As it was the warmest day of the year so far in Suffolk I thought I had better get out and fly to celebrate the day 😀 Not breath of wind (even the windsock in the picture background looked deflated) so out came my little Pilot RC Slick. The transition from flying large scale 91" aircraft to a 67" one took a couple of flights to get used to. Things just seem to happen a lot quicker and more precision needed. The "biggies" seem to hold the air better although that's not a scientific opinion by any means. Anyway a lot of fun to be had if not a perfect performance even for a freestyler like me. It won't be long before I will have to lower the mower blade to remove the daisies!