PeterF

Can't help you on this one, I painted all my wooden structure before painting, then coveted with natural solartex then painted the outside. The only covering that can be seen from the inside is black and my build photos show this. I do not know what the prototype is like but my model being black is not an issue. What I have done at times in situations like this is with plastic handle paint brushes is to bend the handles (heat gun may help) to get an angle the the head, of for wooden ones cut them down then glue them back together at an angle.

I was in the same position with a plan of Miss Lizzy, got round to building it over winter electrified. Flew it again yesterday, a really nice model. See a couple of posts down at https://forums.modelflying.co.uk/index.php?/topic/24961-forum-members-new-models-lets-see-them/page/195/&tab=comments#elControls_996254_menu

Looking at some pictures the movable mounts for the motor/prop combos look a bit flimsy. I know they will have been engineered and should be suitable. They will experience a mix of forces, torque from the prop rotation along with tension from prop thrust not to mention the gyroscopic forces when the props transition from hover to forward flight and back again and added in to that in hover the prop is forward of the hinge point.

Richard, hat off to you on this, I did think about going the chain route because that mimics the full size but could not find the parts. I am a little embarrassed now at not having worked through to this detail. I ended up with a wire breaking on the ground and swapping to low profile servos in the wings. Still flying the plane, last out a week ago and it still flies well and looks good.

Even if the UBEC is not drawing any current the device will still keep the output wires at the correct voltage so the voltage control and monitoring circuits will still be drawing current and there will be some leakage current through the power circuit creating a standby current draw. A 6 milliamp current draw over a week will flatten a 1000mAh battery.

One thing I would suggest is to ask your examiner to demonstrate the A test to you. I am an area chief examiner and find this can be really helpful for both A and B candidates. It is one thing looking at videos and reading texts and trying to understand these, but if I fly what is required in front of them, they can see what is expected and there is no confusion.

Thst sounds like much to much fan for a 2700mAh battery, that size battery is typically running 55mm fans, it.might do 2 55mm fans but not 2 70mm fans. I have a model with twin 70mm fans on 4S, it pulls 105A and I use a 62500mAh battery. Your may not be that high powered but as said above, you should always have a Watt meter to check.

This is an outcome of fluid flow dynamics, for a specified thrust it takes less power to move a large mass of air slowly (prop) than a small mass of air rapidly (ducted fan).

IIRC the government wanted to reduce it to 15%, held a consultation and got pushback from BMFA and probably the RC car fraternity and probably other users/ producers and it was set at 30% so ready mixed high nitro fuels did not get included. Can not remember the exact details.

I am guessing you mean Tayna batteries and auto correct has changed it. They have a very good reputation.

Richard, I have been away for a few days and missed these recent updates. I am glad you have got back to your Moth. Excellent modelling, puts some of my work in the shade, especially the slats, I simply screwed mine in place. I look forward to seeing your ongoing work and the plane flying.

If the model needs me to cut out the formers and ribs then getting started is the rate limiting step, I do not like cutting parts, I find that I am less than accurate. Once over this stage I am OK. If it is a ready cut kit, no issues, straight in and through the build.

Spent a lifetime designing methanol production plants, they typically produce 3,000 to 6,000 tonnes per day, but the minimum order quantity needs a small tanker (ship tanker not lorry tanker) to collect it with if you order direct.

I have had it once on a NiCad Rx set many years ago. Someone recommended running a dehumidifier in my garage workshop to keep it drier, only run it for 2-3 hours twice a day. I have not had black wire since then, but not sure if that is due to the dehumidifier or the move away from NiCad Rx batteries.

First flights today, what a lovely plane, flew on rails straight away and inspired a lot of confidence in the first couple of minutes, well balanced, positive controls and responsive so I put it straight through most of the B test on the maiden flight without any issue. Why have I waited so long to get around to building it!!!!.