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Member postings for Mark Elen

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

Thread: Mark's TN Hawk Build
23/05/2018 14:15:38

Hi All,

Not got a lot done in the last few days, as I have been busy at work. I did get the fan formers fettled and the fan now slides in nicely.

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I had to take less than 1mm all around to get it to fit in.

I also had a major mishap whilst I was flying on Sunday. The foamie viper that I bought to get some EDF practice bit the dust. It flew a treat, but launching it was always been a bit 'hit and miss' on your own. Up until Sunday, I had always caught any wing drop on launch.

After seeing the review in this months RCM&E, I have ordered a Super Viper and intend to fit the flaps using the servos retrieved from the pile of bits I have, hopefully, this will give me the confidence to fly this when its finished.

Cheers

Mark

19/05/2018 00:02:35

A little more done tonight:

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I don't know why I've been putting this job off, it went really well and I'm very happy with the result.

Cheers

Mark

Thread: Chris's Vicomte 1916
18/05/2018 21:39:57

Hi Chris,

You should be proud buddy, excellent work there. Very envious of the feta, olives and raki coming your way. Have a great holiday👍

Cheers

Mark

Thread: Mark's TN Hawk Build
18/05/2018 19:28:44

*Double Post*

 

Edited By Mark Elen on 18/05/2018 19:31:11

18/05/2018 19:28:43

Hi All,

Some good discussion going on above. It would be great to see some photos of your build Geoffery and welcome to the forum👍

I have been flying this afternoon, had a great few hours practising spins with the Ballerina. No wind whatsoever at times and it could have done with flaps, once it got into ground effect, it just wanted to float and float.

Got home and made up the mounts for the elevator servos, these are 1/8 ply and they now need sinking into the rear fuselage to hold the servo mounts themselves.

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I screwed them together and made them as one then separated when I was happy with them.

Cheers

Mark

16/05/2018 11:25:47

Hi Craig,

Thanks for your kind comments. Off topic is no problem at all, if it helps someone else in the future that is what these forums are all about. 👍 It's always good to see how others have attacked similar issues, I always pick up loads of good tips from other people's build logs.

Cheers

Mark

16/05/2018 08:42:50

Hi Gents,

Many thanks for your kind comments. On Tony's build photos, he shows this bracket (although in a different form) and it's also shown on the plan. I did wonder if it was necessary, so I initially made up the linkage without it. I found that without it, with the leg down, the slider is free to slide up and down on the arm and due to the geometry of the linkage, it allows a fair bit of lateral play in the steering. The bracket has reduced this significantly.

Regarding fitting Chris, what I did was to hold the bracket in position next to the linkage with the nose leg up and marked up the hole, then just drilled and fitted it.

Cheers

Mark

15/05/2018 23:31:46

Hi Martin,

I may get a couple of smaller packs if weight becomes an issue. I got the RX8R because with it set up as the master as I have it, if it looses the signal to its antennas, it will use the signal from the slave RX antennas to drive both receivers. They connect together with the SBUS. (At least that is my understanding after watching the video on the website)

I could have just used another X8R but then if one looses signal, you loose all of the channels connected to it.

Both receivers get bound one after the other, you just need to disable telemetry on one using the jumper (I jumpered pins 1&2 on the X8R to set it as channels 9 to 16 with no telemetry (telemetry is carried on the RX8R which was bound with no jumpers - channels 1 to 8)

It does seem strange binding two receivers to the TX without changing any settings at all on the TX though. - just hit the bind button one after the other.

I have got a pair of fvlss Lipo voltage sensors that I'm planning to use to give cell voltage on my pair of 4S flight batteries, I have one of these set up on my foamie viper, it took a bit of setting up, but now I've got it set to call out low voltage when the lowest cell reaches 3.7v and to start calling out the actual voltage below 3.6. It works well, and I find that set like that, when I get the battery out and on the tester, without any load they come back at around 3.75 v

Cheers

Mark

Thread: Chris's Vicomte 1916
15/05/2018 22:34:16

Hi Chris,

Good to see you back at the building board. Keep up the good work👍

Not long to October😁

Cheers

Mark

Thread: Mark's TN Hawk Build
15/05/2018 22:23:16

Hi All,

I've taken a break from building tonight, as my goodies turned up today. (Thanks PPI😎)

I had a bit of a quandary regarding the flaps and the elevators, in that one of each of the servos were going the wrong direction. I was going to open up the servos and reverse one of each by re-soldering the motor and pot wires. But then when it came to it, I thought, 'you've got 16 channels on the tanaris, why not use them'

I was just going to get another X8R, but for the small additional cost, the RX8R redundant receiver was available, although, only with non-EU firmware. The EU was out of stock. So tonight, I've uploaded the EU firmware and set up the 2 receivers.

I now have 16 channels to work with. Each servo can have its own channel and be programmed in the radio.

I also decided not to use either the NIMh or the SBEC. I have gone with a pair of Life batteries and a Powerbox Sensor.

I got the whole lot set up and working on the bench and am pretty happy with the set up, although there will be loads of lovely wiring to tidy and sort.

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I'm getting concerned about the weight adding up, but I'm going to be happier knowing it's not relying on just one battery or receiver. I'm thinking I'll split the elevator, aileron and flap servos one to each receiver.

Cheers

Mark

Edited By Mark Elen on 15/05/2018 22:23:52

14/05/2018 22:24:57

Hi Martin,

You are correct of coarse, I wasn't totally happy with this, and I have managed to break off those Cyparis blocks. They took a bit of breaking. To be honest, I don't know what I'm messing about at, there is loads of room to use the mounts as they are intended. The ruler below is on the line of the fan duct, the mount is flush with the fuselage side.

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Cheers

Mark

14/05/2018 20:00:12

Hi Martin,

Fussy is my middle name😂 I like to think through the various ways of attacking things and I had thought about screwing the nosecone on and discounted it. More thought needed.....

I have attacked a little job that I've been putting off for a while. I don't like the elevator servos poking out of the rear fus, so I got a pair of slim wing servos to hide here. It then became a 'how do I make this look neat' job. After going back and forward thinking I'll make up a ply plate, I ended up deciding on using a couple of standard mini servo mounts, butchered about a bit.

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Im still going to stick the servos on with the foam sticky pads, but those little blocks of Cyparis are rock solid glued on with CA.

Now all I need to do is cut the rear fus for these to fit into.

Cheers

Mark

13/05/2018 16:23:30

I've not really done much the last couple of days, although I have got the top sheeting finished and it is now ready for the razor plane.

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I have have also got the tail plane pieces glued together

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They are going to need a little notch in the leading edge where they meet the inside of the fuselage, as I have made the first sheet on the top of the fuselage a bit too long.

I have decided to cut up a couple of mini servo mounts to fabricate the small air intakes on the top of the fus.

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Once I get them positioned and the holes cut for them, they will drop in from the bottom and the flat section at the front will be gluing area.

I decided to do some destructive testing to decide what glue to use for these, the photo below shows a couple of strips of balsa glued onto the scrap piece of plastic, the one one the left with superphatic, the one on the right with CA.

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Neither of them wanted to separate very easily, but the CA definitely won this test.

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I'm currently formulating a plan for the nosecone, At the moment, I'm leaning towards not gluing it on and making it removable with 2 or 3 little dowel pegs and a couple of neodynium magnets. I don't know, is it going to be a load of work for no real gain?

Cheers

Mark

Thread: Chris's Vicomte 1916
12/05/2018 20:44:40

Hi Chris,

Sorry to hear about the accident, keep smiling buddy, these things are sent to try us.

All the best

Mark

Thread: Mark's TN Hawk Build
11/05/2018 14:19:25

Hi all,

It's my birthday today, so have taken the day off work and have spent most of the morning working on the Hawk. I've made up the steering servo mount and fitted the retract. I normally don't enjoy making up linkages and hooking them up, but I've enjoyed this. I made up a small bracket to guide the pushrod from some Ali angle scrap that I had from work.

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I was going to y lead this servo with the rudder servo, but I found that when retracted on full deflection of the rudder one side, the servo was stalling, so I decided to give this its own channel and i have programmed up the tanaris to only operate this servo whilst the gear is down. By doing this it will allow me to reduce the throw in programming if it needs it after taxi testing.

I've pretty much decided that I'm going to make up a little hatch to be able to get at this servo, rather than following the plan and boxing it in.

Whilst I was doing this, the postman turned up with a nice Birthday Present, a cheque for PPI. 😎

Cheers

Mark

10/05/2018 23:12:26

Done a bit more today, beginning with the upper fuselage/hatch. I cut up a couple of spacers out of acetate to both space f8 off the rear sheeting and to stop the glue from contacting the rear decking, you can just make them out on the first photo. You can also see the block I had to use to straighten the former at the front, the light ply was warped quite a bit.

I also got started making up the steering servo mount using scrap 1/4 ply.

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Cheers

Mark

Edited By Mark Elen on 10/05/2018 23:13:01

09/05/2018 20:50:58

Tonight I have got the rear top section of the fuselage done, I glued the first section on this morning before going to work. I have gone a little 'off piste' as I didn't like the large triangular hole at the rear and it looked to me like the filler bits would sand away to pretty much nothing, so I made up a couple of triangular fillets to help here.

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Not looking forward to planing that off, but more to do before I get to that.

Cheers

Mark

Thread: Chris's Vicomte 1916
08/05/2018 22:06:36

Hi Chris,

Still watching your progress with interest. Superb workmanship showing on those wings. They look great. 👍

It must be 20 years since I last used Solartex, from what I can remember, apart from the comments above regarding tight curves, I loved the smell of the stuff.

I'm thinking we may have to stock up, ready for October😁

Cheers

Mark

Thread: Mark's TN Hawk Build
08/05/2018 21:44:42

Hi Martin,

Sorry to hear that. You are correct though, there is no excuse for CNC bits not fitting, I can only assume it is my poor building that has caused the issue with these. 😁

I've bodged them to fit. I cut up a strip of .8mm ply and made up 4 short pieces to extend the formers. It has worked a treat, they are also now a sliding fit.

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I also got the rear fuselage sides made up tonight and fitted:

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Cheers

Mark

08/05/2018 19:06:04

Got home from work early today, so got a bit more done.

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Now ive come across the first snag with the CNC cutting. F8 fits perfectly in that it's a nice sliding fit at the back - this is one of the hatch formers, so no worries with this one.

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F4 and F5 are both 2mm short in that they don't reach the sides. F4 needs gluing in. I'm going to have to get creative with this.😂

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Cheers

Mark

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 Yes - for the first time
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