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Also from similarly reported issues in the past the relay screws can work loose and the resulting vibration in the high current metal strap connectors can fracture them. So worth examining these caref ...

Hi Bryan & Mark,

Bryan - as Mark outlined it's likely to be either the fuse or the relay that's failed ... simple check (for a -52) is to turn on the battery master switch and if the green 'bat ...

The following topic link is for a -52, but may assist your fault finding.

http://forums.matronics.com/viewtopic.php?t=16770072

For a -52 ... it could be the (parallel) chronometer heaters are ca ...

My partner Cathy and I are visiting Australia (Adelaide / Cairns / Sydney) during October and then in November on to New Zealand (Taupo / Wellington / Nelson / Methven / Queenstown / Milford Sound / W ...

Mark,

Your time, your call ... no issue with that from me. For US products this side of the pond read the GBP price as being numerically the same as USD.

Hence I'll take a back seat on this one ...

Mark,

Thanks for your useful insight as always ... I don't have an original antenna to inspect, short of stripping the one out of my aircraft, and neither the analyser kit even if I did. So if you ...

Mark & Jan, thanks for your kind words & for the record "Я не говорю и не читаю русский" ... but latterly Goggle translate is my friend and before that OCR / ...

FYI - be aware that the pitot heater has a simple transistor circuit that only drives the green 'on' lamps (see attached diagram) when the heater is consuming power i.e. it monitors that the heater ...

Chris,
If the points are burned out and the performance deprecated then possibly the internal capacitor (or more likely its connections) across the points has failed; hence the arcing and lack of out ...

John B.

The carburettor heat scoop directs external ram air into the carburettor and there is a good reason why this heat is sourced from cylinder heads and not the exhaust system.

Simply exhaus ...

FYI - Came across these recent articles on a new Russian designed aluminium engine ...

http://aluminiuminsider.com/russian-researchers-design-worlds-first-aluminium-aircraft-engine/

http://stee ...

Hi Andrew,

Like Mark I also fitted the original 'thermo(stat)-(safety)valve' back into my -52 in 2010 and it's reduced the engine warm-up time and more importantly got the oil temps into the green ...

The Yak gear lamps are BA7S (bayonet, 7mm, short).

Hi Chris,

You may want to check that any LEDs you use are AC/DC capable, as ordinary LEDs are intolerant of all but the smallest of negative voltages.

The AC capability adds a parallel ordinary ...

Also in the original manual it recommends, after cylinder priming, to wait for the fuel to vapourise for 1-2 minutes in summer & 4-5 in winter before starting from cold.

This pause makes it muc ...

Hi Jay,
Made a rod for my own back in providing TRIG TY91/TS21 install images, schematics, W&B etc that took up 10 pages.
Remainder;
1 - signatures page
1 - contents
4 - scope
5 - compliance ...

Hi Jay,

In the UK, until recently, the only option on my TRIG TY91/TT21 install was to get a minor mod drawn up by a approved design authority (DA), given the -52 is an ex-military / non-EASA aircr ...

With a pre-war electrical system and unsuppressed relays everywhere I've yet to find an electrically 'quiet' YAK-52 and the only concession to modernity in mine is the automotive plug conversion :-) ...

Had a dual head TY91 radio fitted in my -52 nine months back, replacing SPU-9 intercom panels in each cockpit, and TS21 transponder replacing the Baklan.

Reused existing YAK antenna with new RF ca ...

Forgot got to add to my last post ...

A full spring wind gives at least 3 days operation and, with a diurnal variation of temperature (20 ± 5) °C, the timekeeping is ± 20 s per day.

The relia ...