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  Topic: Servicing compressed air bottle
Vic

Replies: 1
Views: 157

PostForum: Yak-List   Posted: Mon May 16, 2022 1:11 pm   Subject: Re: Servicing compressed air bottle
As glycerine and alcohol can get washed off by water condensation in air I did not see any benefit of using that combo. My approach was clear chain lube , the sticky kind with solvent. Add a decent cu ...
  Topic: Air and fuel bottle preservation
Vic

Replies: 1
Views: 444

PostForum: Yak-List   Posted: Mon Jan 17, 2022 2:41 pm   Subject: Re: Air and fuel bottle preservation
After each periodic pressure tests I spray a lot of motorbike clear chain grease into air tanks and let dry for a few days before refitting in the aircraft. Never had corrosion in between tests. Shoul ...
  Topic: Still will not start
Vic

Replies: 7
Views: 856

PostForum: Yak-List   Posted: Thu Oct 28, 2021 6:34 am   Subject: Re: Still will not start
Did you check the primer jet for a reasonable spray forming, a poor running down of fuel from there is not great for starting ?
As to no suction on carb, my guess the blower drive may be defectiv ...
  Topic: question/help
Vic

Replies: 3
Views: 522

PostForum: Yak-List   Posted: Wed Oct 20, 2021 8:31 am   Subject: Re: question/help
Starting on mags only or with buzzer coil as is standard ? Check sparks on buzzer coil cable with air closed.

Vic
  Topic: What is the cylinder torque value for the nuts at the base.
Vic

Replies: 4
Views: 2440

PostForum: Yak-List   Posted: Sun Jun 23, 2019 12:34 pm   Subject: Re: What is the cylinder torque value for the nuts at the ba
No matter, how much you mess around with all sorts of torque settings, your real root of the mess is the paper gasket. I bet, nobody with a M 14 has had any troubles there, no gasket , just an o-ring ...
  Topic: Yak52 crash in Poland
Vic

Replies: 5
Views: 2914

PostForum: Yak-List   Posted: Tue Jun 18, 2019 5:25 pm   Subject: Re: Yak52 crash in Poland
Foreign objects blocking the elevator at the rear of the fuselage after aerobatics. ?? A typical cause for a fatal crash in the 52 .

Vic
  Topic: Exhaust clamp seals
Vic

Replies: 4
Views: 4368

PostForum: Yak-List   Posted: Thu Mar 14, 2019 6:21 pm   Subject: Re: Exhaust clamp seals
We still keep this fiberglass seal, no better idea so far. But when you have to take off the exhaust you need a fresh length of fiber of course because a well used seal ages and disintegrates when und ...
  Topic: Engine running rough at high power settings?
Vic

Replies: 21
Views: 11751

PostForum: Yak-List   Posted: Mon Nov 05, 2018 5:52 am   Subject: Re: Engine running rough at high power settings?
Hmm, still sounds like bad engine rubber mounts or loose engine cowling or cowling seats . . .

Vic
  Topic: Yak Air Valves
Vic

Replies: 7
Views: 4592

PostForum: Yak-List   Posted: Wed Aug 29, 2018 4:09 pm   Subject: Re: Yak Air Valves
Hi Rico,
how did you check for leaks, with soapy water foam ? Did you check the hose to the pressure indicator plus this instrument itself ? We had same problem on the 18 T but in fact it was the hos ...
  Topic: Re Yak18T fuel senders are they identical to the CJ6
Vic

Replies: 5
Views: 4300

PostForum: Yak-List   Posted: Tue Jul 03, 2018 4:56 pm   Subject: Re: Re Yak18T fuel senders are they identical to the CJ6
These are 18 T floats. Chinese aircraft are extremely rare in Europe.

Vic
  Topic: Re Yak18T fuel senders are they identical to the CJ6
Vic

Replies: 5
Views: 4300

PostForum: Yak-List   Posted: Tue Jul 03, 2018 3:02 pm   Subject: Re: Re Yak18T fuel senders are they identical to the CJ6
That is a typical defect after all these years. The fuel obviously dilutes any additive in the plastic floats so they shrink and no longer float. I copied a few sets in stainless but am not very keen ...
  Topic: Engine running rough at high power settings?
Vic

Replies: 21
Views: 11751

PostForum: Yak-List   Posted: Thu Jun 28, 2018 2:59 pm   Subject: Re: Engine running rough at high power settings?
Hi Andrew,
may I suggest to check firmness of engine cowling brackets and cowling cushions ? I donĀ“t know much about your type but with our 18 T we had sudden vibrations for years for unknown reason ...
  Topic: Booster Coil needed please
Vic

Replies: 6
Views: 5087

PostForum: Yak-List   Posted: Mon Jun 18, 2018 6:57 pm   Subject: Re: Booster Coil needed please
Well, it is just another ignition coil, so it is mortal - remember coil troubles on M 14s ??

Vic
  Topic: Sukhoi iris
Vic

Replies: 3
Views: 3662

PostForum: Yak-List   Posted: Mon Mar 12, 2018 4:49 am   Subject: Re: Sukhoi iris
Hi Jay,
to be open, there are a few bits you have to work out from your side: Seems I did two new brackets to mount the iris to the engine, plus a new lever, see photo. I believe my shutters came fro ...
  Topic: Sukhoi iris
Vic

Replies: 3
Views: 3662

PostForum: Yak-List   Posted: Sat Mar 10, 2018 6:03 pm   Subject: Re: Sukhoi iris
I have replaced the Yak shutters on the 18 T with a Sukhoi iris for easy access and better view of the engine. Expect to be faced with a LOT of friction in the actuating linkages and lever. I do not k ...
  Topic: Engine stumble in flight
Vic

Replies: 41
Views: 23533

PostForum: Yak-List   Posted: Tue Mar 06, 2018 3:46 am   Subject: Re: Engine stumble in flight
In the photo you can see the aluminium foil of the capacitor, the primary windings are not there, just the HT wires around it.
There are a lot of good ideas in this thread, we certainly know eff ...
  Topic: Engine stumble in flight
Vic

Replies: 41
Views: 23533

PostForum: Yak-List   Posted: Sun Feb 18, 2018 6:33 am   Subject: Re: Engine stumble in flight
We had quite some troubles with bad/new coils in past years and this took some time to find out all sides of the problem. Since we do a mag run up AFTER most flights after clearing the runway and have ...
  Topic: Yak 18T sound warning box
Vic

Replies: 1
Views: 1900

PostForum: Yak-List   Posted: Mon Jan 08, 2018 4:32 am   Subject: Re: Yak 18T sound warning box
Well, I could not find out details of all electronics related to stall warning or any other sound alarms that go into the intercom. But one (of several?) box sits on the bottom of the fuselage roughly ...
  Topic: Yak 18T Jacks
Vic

Replies: 7
Views: 5716

PostForum: Yak-List   Posted: Wed Sep 27, 2017 12:51 pm   Subject: Re: Yak 18T Jacks
Hello Pat,
sorry, no jacks for sale, but maybe a photo will give you an idea. No need for offset design, just some tripods with feet not too wide apart. You just orientate the feet to clear the wheel ...
  Topic: Radio replacement
Vic

Replies: 8
Views: 5369

PostForum: Yak-List   Posted: Mon Jun 26, 2017 4:36 am   Subject: Re: Radio replacement
For a start, myself being NO electronics wizard I installed the Trig in the 18 T myself for 8.33 requirement in EU. We had a LOT of noise in the headsets when NOT doing radio calls. The calls were cle ...
 
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