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Member postings for cymaz

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

Thread: Forum members' new models: Let's see them.
14/06/2020 17:11:32

John, must ask about the floats. How much difference to the cg do they make? Obviously creating more drag...any flight differences

Thread: Dual Rx
14/06/2020 17:05:45
Posted by Philip Lewis 3 on 14/06/2020 14:11:05:

No you don't because you effectively only have one RX with 16 channels in two little black boxes.

Mine are bound separately. One Rx doing port, the other starboard, with separate batteries and switches. If one battery and Rx fail the plane has still some commands.

14/06/2020 13:24:27

I’ve done this with a couple of FrSky fasst Rxs. To be honest, I’ve not tried the fail safe yet, though if you set failsafe independantly on each Rex then it would work. Binding the Rxs was no issue.

Thread: Ebay sellers...
14/06/2020 08:23:38

Still £4 too much dont know

Thread: Need a new fuel pump (glow fuel)
13/06/2020 22:45:38




Ive used one of THESE with excellent service for several years

Edited By cymaz on 13/06/2020 22:50:33

Thread: DB Major Mannock
13/06/2020 12:18:08

Don’t put me under any more pressure than I’m feeling already.....and it’s not finished crying

13/06/2020 11:30:58

More nose work done... engine cooling, baffles, entry and exits have been thought about.



Edited By cymaz on 13/06/2020 11:32:03

Thread: Returning after a 20 year absence!
12/06/2020 06:31:42

After stripping the engine as much as possible of all the plastic parts, have a heat gun and some welding gloves and heat the engine.

Make sure the heat is even over the bearing housings, it will need to get very warm if not hot ....a hair dryer is no good. Once the old oil is smoking well the bearings should drop out. Make a note of which way the crank pin, liner and piston come out as well.

Modelfixings or Simply Bearings are excellent for bearing replacements.

when putting back together, replace the o rings, any fuel tubing and glow plug.

Edited By cymaz on 12/06/2020 06:32:22

Edited By cymaz on 12/06/2020 06:32:53

Thread: Precedent Stampe 1/4 Scale
11/06/2020 22:45:07

It’s surprising how moving “useful “ weight can reduce the need for ballast.

Thread: Slipstream Sbach 342 coming out of retirement?
11/06/2020 17:52:07

Epoxy resin should be good enough for the gauze. DLE 55 would haul it around nicely.....buts that’s meblushface 23

Thread: Bristol Blenheim Mk1V
11/06/2020 01:01:05

Was the old ply frame unsuited for the new glazing ? I saw a frame a couple of pages back.

Thread: Precedent Stampe 1/4 Scale
09/06/2020 06:01:03

I’ve used clevis links and nylon fishing trace wire. Just a simple job of unclipping everything. The “closed loop “ on the aileron was just black elastic.

finished c-fxme 010.jpg

09/06/2020 05:39:03

No. Don’t forget that the wing struts are!

Thread: Tow release
08/06/2020 17:56:15

It doesn’t work. As soon as some load is applied the rod jams in the tube. I placed a loop of string around the rod and pulled about 2kg .

Back to the drawing board

Edited By cymaz on 08/06/2020 17:57:03

08/06/2020 17:11:54

Thanks for the input yes

08/06/2020 17:11:32
Posted by Frank Skilbeck on 08/06/2020 08:01:41:

Looking at the set up, it doesn't look like you have much servo movement required to operate the release, it's always best to have the connection on the servo as close to the centre as possible so the servo torque generates the maximum pull force.

The release has to work, if the glider gets hung up and can't release then the tug release has to operate, so make sure you test it by at least checking that it operates with the pull force of the glider weight. >99% of tows go smoothly, but if it doesn't it can go wrong quite quickly and the release operating is what will save the tug. And putting on my engineers hat the system above looks like it could suffer from a lot of twisting forces which could add to it locking up, so make sure the bell crank hinge is very rigid with no slop and you check it works reliably with the weight of the largest glider you plan to tow.

There is a close fitting rod in the tube, with about 1/2 mm clearance. There is no binding. I will replace the plastic clevis for something more robust.

08/06/2020 17:08:50
Posted by Steve J on 08/06/2020 09:44:36:
Posted by cymaz on 08/06/2020 06:21:43:

I’ve cobbled together a tow release for the Wot4 XL.

That looks overly complicated to me. Why didn't you put the release on the fuse just behind the wing?

I used the pre built hatch on the underneath of the wing. Used the Foss picture as a guide.

Thread: Robin Fowler's Percival Prentice.
08/06/2020 06:26:27

Publish the film on YouTube then use the icon on the above menu bar to put it on the forum. Look forward to see it.

Thread: Tow release
08/06/2020 06:21:43

Afternoon a couple of evenings work, I’ve cobbled together a tow release for the Wot4 XL.

Its all made from bits lying around the garage. Length of 20mm square hardwood, 2 lengths of aluminium tube, servo and bits of ironmongery. Works well and doesn’t get fouled up with the tank or Rx inside the fuselage



Thread: Radio cases
06/06/2020 19:29:55

I have one one of THESE , does me well. Though, I don’t think it was from Howes.

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