By continuing to use this site, you agree to our use of cookies. Find out more

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
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.

image.jpeg

image.jpeg

image.jpeg

image.jpeg

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.

image.jpeg

image.jpeg

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.

image.jpeg

image.jpeg

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.

image.jpeg

I have have also got the tail plane pieces glued together

image.jpeg

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.

image.jpeg

image.jpeg

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.

image.jpeg

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

image.jpeg

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.

image.jpeg

image.jpeg

image.jpeg

image.jpeg

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.

image.jpeg

image.jpeg

image.jpeg

image.jpeg

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.

image.jpeg

image.jpeg

image.jpeg

image.jpeg

image.jpeg

image.jpeg

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.

image.jpeg

image.jpeg

image.jpeg

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

image.jpeg

image.jpeg

image.jpeg

image.jpeg

Cheers

Mark

08/05/2018 19:06:04

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

image.jpeg

image.jpeg

image.jpeg

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.

image.jpeg

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.😂

image.jpeg

image.jpeg

Cheers

Mark

08/05/2018 12:59:29

Here are a few more pictures of the fuselage going together. The fit of all of the parts is excellent. Unfortunately, there was not enough of the 12mm triangle in the kit - only 2 lengths, that's enough for the 2 pieces on the bottom each side, leaving not quite enough for the top front piece.

Fortunately, I had a length of 1/2" in my stock so I'm using that for what is left to do.

I also changed my mind with the jig and have built it directly over the plan

image.jpeg

image.jpeg

image.jpeg

image.jpeg

image.jpeg

Cheers

Mark

07/05/2018 08:07:23

Hi Martin,

Our field is similar, on Friday the ballerina wanted to nose over on landing the field was so boggy, yesterday was totally different, the field had dried out a lot, but was still soft in places. I'm hoping by summer it will be a lot harder.

image.jpeg

The fuselage is coming along.

image.jpeg

image.jpeg

Cheers

Mark

Thread: Spring 2018 is here...been flying?
06/05/2018 18:02:03

Glorious day in Lincolnshire, only 2 of us at the strip all morning. Managed a few flights with the Ballerina and completed my first Bunt. Still need a load of practice before I'm ready to take my B

image.jpeg

Cheers

Mark

Thread: Mark's TN Hawk Build
06/05/2018 09:45:21

Hi Martin,

That doesn't sound good. I'm in the same boat as our field is grass. I think it's going to be a summertime only model. I may have to look into somewhere else that has Tarmac.

I have copied your post onto your build log👍

Done a little more this morning, drawn all of the former positions onto both fuselage sides and cut and fit one of the first pieces of 12mm triangle. I had to saw in a few cuts to get it to bend around the curve. Once it was glued into position, I let some Superphatic capillary into the cuts.

image.jpeg

image.jpeg

Cheers

Mark

Thread: Martin`s Hawk
06/05/2018 09:36:35
Posted by Martin McIntosh on 05/05/2018 20:31:15:

Took my version of the Hawk to the field today for taxiing trials. The grass was cut short yesterday but lots of cuttings left on and the ground underneath is still quite soft. Anyway, with those small wheels there was no way that it was ever going to reach take off speed assuming that the fan was running at maximum. One of the wheels actually fell off when taking the model apart because a grub screw came loose. The model was also leaning to one side due to an oleo leg sticking up. Easily fixed but this does not bode good for even a pristine grass field. I need some tarmac.

Wish that I could transfer this post to my own Hawk build blog but don`t know how to do it.

Edited By Martin McIntosh on 05/05/2018 20:34:04

 
Thread: Mark's TN Hawk Build
05/05/2018 19:58:23

Hi Chris,

I now have all of the ingredients, I will post up a write up once the deed is done👍

Been working away fuselage side building, not much to say, except the CNC routing on the light ply is excellent, absolute perfect fit on the doublers.

I always like to lay out the two fuselage sides as per the last photo, it makes sure there is no chance of two of the same.

image.jpeg

image.jpeg

image.jpeg

image.jpeg

image.jpeg

Cheers

Mark

Magazine Locator

Want the latest issue of RCM&E? Use our magazine locator link to find your nearest stockist!

Find RCM&E! 

Latest Forum Posts
Support Our Partners
electricwingman 2017
Pepe Aircraft
Cambridge Gliding Club
CML
Wings & Wheels 2019
Slec
Gliders Distribution
Advertise With Us
Sarik
Do you use a throttle kill switch?
Q: This refers to electric-powered models but do you use a throttle kill switch?

 Yes
 No
 Sometimes
 Rarely

Latest Reviews
Digital Back Issues

RCM&E Digital Back Issues

Contact us

Contact us