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Member postings for Frank Skilbeck

Here is a list of all the postings Frank Skilbeck has made in our forums. Click on a thread name to jump to the thread.

Thread: Electric Thrust
22/10/2019 17:33:09

Ecalc gives static thrust and pitch speed too, it also predicts if the propeller pitch is adequate, based on model weight and wing area etc.

Thread: Size of battery & alternatives
22/10/2019 08:09:30

I also use these connectors to avoid the spark when connecting up setups greater than a 6s. The connector with the inline resistor is fitted to the ESC and made up last.

21/10/2019 17:23:40

Yep that's what I do on a model that generates around 1800 watts, 2 x 5,000 mah 4s in series. I use 5.5mm connectors connect the two batteries together and then hook up to the ESC with the antispark connector last. Make sure your ESC can handle 8 cells as well, most can only go to 6 cells so you need to make sure that yours is OK on 8 cells.

Edited By Frank Skilbeck on 21/10/2019 17:24:19

Thread: Servo fitting and horns
19/10/2019 16:54:12

What you actually want to achieve is the required control surface movement using as much as the servo rotation as possible and move the control connection in/out to achieve this. What you don't want to do is find that you are reducing the end points/rates on the transmitter by a large amount to make the control surface move the required distance.

Thread: Chilli jam or chutney
18/10/2019 18:35:14

You've answered your own question, if it goes on buttered toast it's jam, bacon or cheese sarnies and it's a chutney or relish wink

Sounds tasty.

I made a batch of qunice and ginger jam last year, very tasty.

Edited By Frank Skilbeck on 18/10/2019 18:35:59

Thread: Motocalc or Ecalc?
18/10/2019 09:36:36

Simon, no problem in using IC props, just that they are slightly less efficient as they are thicker, especially at the hub, to accommodate the power pulses from an IC engine.

As for watts and amps, remember the watts = volts x amps, so max watts occur at max amps, if you are exceeding the amp rating of a motor or ESC and you aren't getting enough power then you need more volts and probably a different prop. This is where programs like Ecalc come in, you can experiment with different set ups without risking releasing the magic smoke.

BTW I have not used Motorcalc but do use Ecalc and drivecalc and like them both.

Thread: Cover and painting a plane
16/10/2019 18:09:23

I have recently covered a glider in Diacov, a version of Diatex with an adhesive backing, went on very well.

Hard to get in the UK, I got mine from Ronk Aviation in France.

Thread: Altitude announcements
16/10/2019 13:21:00

What is probably happening is that the altitude is updated on a cycle not a continuous analogue signal, so your plane may be at 99ft on one cycle and 103ft on the next, then the logic switch asks the Tx to read out the altitude it's moved onto the next cycle. Note on my MPX system which has the option to do interval readouts it exhibits exactly the same behavior.

So short of adopting Ron's forcing it to say 100ft I don't think there is a lot you can do.

Thread: Plane that can have lots of modifications.
15/10/2019 08:07:18

Multiplex Easy Star has quite a large battery bay so easy to fit larger batteries and easy to make alternate canopies for FPV etc, a more specialised option would be the Ranger Ex

Thread: KV Upgrade ????
14/10/2019 17:44:42

My reckoning is that it will be approx 20% more powerful, so will consume 20% mare amps at full throttle. Measuring amps and volts is a good idea as it maybe that your batteries can't maintain voltage at high amps and some better batteries would help also.

Thread: Latest CAA Update
12/10/2019 13:35:39
Posted by Steve J on 12/10/2019 08:38:11:
Posted by Peter Jenkins on 12/10/2019 00:05:45:

It may be that we end up with a situation where any model flying in the UK covered by the regulations must only be by members of one of these Associations.

A cynic would argue that one of the BMFA's objectives over the last three years or so has been to make sure that there is a significant gap between what association members and non-association members can do in order to increase their membership. We already have a situation where, to all intents and purposes, you have to be an association member to fly thermal soarers.

Steve

Or just looking after their members interests in conjunction with FPVUK, SAA and LMA, would be hard to go and lobby the CAA/DFT and demonstrate that you are effectively promoting safe flying to your non-members. How many non-members of the BMFA/SAA/FPVUK/LMA lobbied their MP.

Thread: Suggestions for sport planes for an OS 25 FX engine
09/10/2019 18:53:01

As a general sports model the RM Aerobat is well worth considering

Thread: Latest CAA Update
07/10/2019 18:52:37
Posted by kc on 07/10/2019 18:42:21:

So a four year old is allowed to fly a half pound weight drone!

Where does it say on the BMFA website that there is an under 250 gram exemption - i couldn;t find it?

It's in CAP 1789 which was referred to on the BMFA website and magazine etc.

Thread: BMFA 'B' Test Video Available
07/10/2019 14:41:46

Yep we just had a roadshow and I did the B demo (and then passed the B later in the day...............), examiner wasn't looking for a word perfect answer to the questions, if you have read up on the latest rules and your club rules then you should have no problems.

BTW glad to see the workshop/garage is as well organised as mine..................................

Thread: Point of purchase tax
04/10/2019 21:40:28

I think this is mainly a US thing, in the US each state sets it's own sales tax, so somebody in a high tax state buying from a low tax state is depriving the state of income. So in some states they have made Ebay treat all sales as a local sale and collect the sales tax, but this applies to items bought by residents of that state.

So if you sold something to say somebody in Washington state then Ebay would add sales tax to the purchase price. I.e the tax applies to the point of purchase not point of sale.

Thread: Ailerons extending to wingtip
04/10/2019 18:42:58

It was quite common in WW1 planes but as aerodynamics became more understood then ailerons weren't extended to the wings tips. I suspect part of the reason is that designers take great care to avoid/reduce the vortex that comes off the wing tip, caused by higher pressure from underneath the wing "leaking" round the wing tip. This causes drag so anything that reduces this will increase the speed of the aircraft.

If you look at slow flying aerobatic models then it's quite common to extend the ailerons to the wing tip, but drag isn't an issue for these models as they aren't chasing speed.

Thread: Take off problems
30/09/2019 15:26:23

A clubmate built a Zero with a 35cc petrol engine and had a very experienced large model flier do the maiden flight, he noted that he had to hold in right rudder quite a while after take off. Once it had climbed and leveled off it flew lovely and was quite a pussycat to land, but needed right rudder applied during and the takeoff and climb out.

Thread: A newbie trying to save some money
28/09/2019 22:14:03

Er even on cars and motorbikes in countries that drive on the right use their right foot/hand to operate the throttle.

From what I understand is that mode 1 is a natural follow on from reed radios where the controls were all operated by switches then 2 channel proportional radios which had separate sticks. Since then it all depended on who taught you to fly.

Thread: Buying cheap new or (slightly) cheaper s/h?
27/09/2019 20:18:56

Yep you should be able to bind multiple Rxs to your Dx5e.

The advantage of the Dx7 will be that the receiver will be bound to that memory so if you select the wrong model it won't work. Also each memory will store all your servo and trim settings, so when you switch models all control surfaces will move in the correct direction and you won't have to re-trim the model.

Thread: Setting Flaps on 8fg & what does offset do?
26/09/2019 18:15:07

"Offset" offsets the control center position, so if you have a flap surface that can move up and down (i.e when mixed with ailerons) you can use the full travel to say give 20 deg up and 80 deg down, with the "normal" centre at 30 deg down and then use the offset to move the control surface mid point to 0 deg, useful on gliders.

If all you are doing is setting flaps up on a power model where they only move down and aren't mixed with ailerons etc then you can ignore this.

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