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Member postings for john davidson 1

Here is a list of all the postings john davidson 1 has made in our forums. Click on a thread name to jump to the thread.

Thread: 6 Turning 4 Burning
22/01/2020 21:32:32

In the video 6 burning 4 turning, the rudder acts in opposition to the nose wheel, I can't see a reason for this, any theories?

Thread: Capacity checker accuracy?
22/01/2020 20:48:04

If one cell has packed in the checker can be tricked into seeing a three cell as a two and give a totally false reading

Thread: Flat plane wing question
21/01/2020 20:07:17

made a B17 from depron 2 years ago with a flat wing, 60in span and four small motors, flew very well until one motor started playing up and without a rudder the plane spiralled in. If it had been an inner I might have landed ok. As JD 8 says wing rigidity is a problem ,put the carbon fibre rod at one third span and perhap another further back would help

Thread: CG for a HK foam F16 Falcon 27in span edf
21/01/2020 19:44:16

thanks for the replies, the forum wins again

regards John

21/01/2020 14:40:27

Setting up an F16 Falcon from hobbyking which I acquired second hand with no info. I believe it is a discontinued model, the later one has a hard suface I think.. Because there are wing extensions along the fuselage it is difficult to estimate the usual one third span for a starting point CG. I think it was a popular model so any input would be welcome.

Thread: What does your wife or significant other half think of your hobby?
30/12/2019 20:13:28

Started model flying 40 years ago with my 5 year old son and was allowed to buy on the pretext it was for him, this was extended to ski gear and ice axes etc with success., So now he is fortyfive the same excuse for a major purchase still works if I don't let on if it his for me or son.{Acrowot for his last birthday}

Thread: SIG Kougar Refurb and Electric Conversion
10/12/2019 20:02:15

In order to get the battery further forward it might be best to cut out the old firewall and situate a new one at the proposed motor mount position,extending the fuse and making a battery hatch at the same time.I have converted several of my old glow models and it usually impossible to get a satisfactory cg otherwise .

Thread: edf tube
03/12/2019 21:00:26

thanks for the interesting replies, I have previously made a twin fin delta with a bare fan unit mounted , flew it then added a cut down polystyrene cup which narrowed the exit, and it flew appreciably faster and was then referred to as the Dyson, The F16 kit was a bargain discontinued HK. kit bought at Barkston bring and buy and came with no info as to setting up so might try the same approach after the maiden to see if it goes faster.

02/12/2019 21:30:27

I am installing an edf fan in an F16 foamy, is it good practice to make a tube the same diameter to connect the fan assembly to the exit of the fuse? I imagine this might help efficiency by limiting turbulence in the duct

Thread: Glossary - your forum needs you!
02/12/2019 21:19:52

my contribution---- Split S

Thread: Solar powered shed
21/11/2019 18:34:57

cuban 8, it is not worse further north, when England has been having floods we missed it all and the last two weekends has been great flying weather with zero wind in the Perth area

Thread: Where do you keep yours?
18/10/2019 18:51:22

the most likely cause seems to be either mischarging at the wrong voltage or physical damage, not storage, I once charged a 2cell 1000mah as a 3cell which the charger did not pick up on, it was on a concrete slab on my bench in the garage and I returned to a burnt out battery and no other damage , still gave me a turn when I thought what could have happened to my garage and contents

Thread: Filling a Hole?
15/10/2019 21:38:18

the clear gorilla glue does not foam up to expand into spaces like the brown one, both excellent glues

Thread: Lipo advice please
08/10/2019 21:05:28

, when making up a lead to connect two 5s packs in series or any other plug soldering,be very carefull to check polarity, it is possible to fry the receiver and all the servos in a twinke of an eye,

Thread: 2019 Special Issue
01/10/2019 18:54:00

One anomaly of the SPECIAL ISSUE----- the easiest entry to building from plans for, beginners especially, is using depron but it seems to be beneath the dignity of the expert contributors. An article on techniques and glues peculiar to this way of building might have helped starters to the hobby

Thread: Nice gesture from Hobbyking
18/08/2019 17:50:21

you twist the joystick for rudder

Thread: wiring for twin mustang with two batteries
14/03/2018 21:49:57

Thanks for that point, I hadn't appreciated there could be a difference between the channels. Presently at the stage of tidying the wiring and situating the batteries for balance so tomorrow I will include that in my run up checks.

Appreciate everyones comments and help,the forum is great help in expanding ones experience even afer many years flying

14/03/2018 20:00:26

I can see the sense in joining the batteries in parallel, the downside is taking a heavy lead across to the other fuse. The twin mustang is quite small-1.3metres , a larger plane would justify the extra wiring . I would hesitate to disable the bec as I have had no trouble using up to 5cells ( with advice from 4MAX using a quality power train)

The receiver is Spektrum which I use in all planes except small 2 to 3 cell . As I said above the motor/esc is the donkey combo from HK quite good performance for £12 each!

Thread: Bj's Modellflyg videos
13/03/2018 22:39:05

Do you have any problems with lipos in low temps? here in Scotland I find if flying in low temps especially with small (500s) they get cold quickly and do not perform at high throttle. Larger 2200s dont seem to be affected but I dont have a chance to try at -20

Thread: wiring for twin mustang with two batteries
13/03/2018 22:24:43

I didnt have a y so made one from two extensions and first suspected a dry joint but put a meter on it for continuity and was ok so thought for another answer. I am usinng two donkeys from HK with soldered on escs (£12each) so wondered if the cheap escs being built down to price is a factor. I had used another donkey in a depron Hurricane tankbuster (40 mm cannon) and it was perfectly ok

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