Started a spare parts list

[danny_galaga]

3 hours ago, facthunter said:

Any club that accepts me I wouldn't want to belong to.   Nev

 

 

 

[Blueadventures]

10 hours ago, Moneybox said:

https://euro-industry.com/main.php?index=details&cat=355&prod=23205115&lang=en

 

Wacker P12 Thermal Paste..... 

 

I think I've heard enough of this argument. Isn't it easier to just buy a tube?

Yep; that's what I did years ago.  Could get it from Melbourne back then.   Maybe Ian could get some into the shop at a fair price.

[Arron25]

23 minutes ago, Blueadventures said:

Yep; that's what I did years ago.  Could get it from Melbourne back then.   Maybe Ian could get some into the shop at a fair price.

T9-PLATINUM Platinum Thermal Grease, Hardware | Wagner Online Electronic Stores

WWW.WAGNERONLINE.COM.AU

---

A thermal grease with high thermal conductivity and low thermal resistance which fills air gaps and improves heat dissipation. Best choice for thermal dissipation to improve the cooling of CPU, GPU and...

 

[skippydiesel]

On 31/08/2024 at 8:51 AM, Moneybox said:

Some people might not be happy to buy from overseas. If that's the case I'd happily buy a few and post locally however I'm not into buying and selling anything anymore just happy to help.

I just checked the price of  1 pk Wacker P12 Thermal Paste , delivered Australia, NSW - Eu 101.60 becomes $166.05 Au

 

Did you read my post for a recommended alternative, available in Australia from Mektronic $65.15 (delivered AU) https://mektronics.com.au/products/mg-chemicals-heat-transfer-compound-silicone-150

[Red]

16 minutes ago, Moneybox said:

Am I missing something?

 

Perhaps missing How small an amount 20ml is.

[skippydiesel]

On 31/08/2024 at 8:51 AM, Moneybox said:

Some people might not be happy to buy from overseas. If that's the case I'd happily buy a few and post locally however I'm not into buying and selling anything anymore just happy to help.

Am I missing something?

 

Dont know how the top bit transferred.

 

Yes, you missing the currency conversion on the product itself and the exorbitent delivery cost also in EU - a trap for the 😈

[skippydiesel]

Wacker from EU - Just now - EUR 132.80 = AU 218.51= $10.96/ml

 

Compared with;

 

In Au - MG Chemicals  for $65.15 = about $ 0.44/gm

 

True the Wacker P12 remains Rotax recommended product, however the MG has been recommended by a highly respected Rotax  technician on the Rotax Owners Forum with the statement MG Chemicals  Heat Transfer Compound Silicon as an appropriate substitute, that he has used to good effect for 23 years.

 

I am merely presenting, what I believe is a rational/cost effective alternative.

 

There are maintainers, out there, who are obsessed with following every detail of Rotax recommended service/items, to the point where their aircraft is grounded due to their inability to make a logical alternative decision  eg to use an available product, at reasonable cost, that meets/exceeds Rotax standards, when the recommended product may be  difficult to access and prohibitively expensive.

 

Ultimately, I support  the right of the owner/maintainer, to use whatever they wish to look after their  Rotax. 

[Arron25]

15 hours ago, Moneybox said:

Yes 20ml is small but we don’t replace spark plugs often and a very small amount is needed for each application.

I bought a 20ml tube for my (computer repair) shop use 15 years ago..... probably used 1/10th maybe...

Never use what the manufacturers supply, preferring to use my own..

Edited September 4 by Arron25

[skippydiesel]

2 hours ago, Arron25 said:

I bought a 20ml tube for my (computer repair) shop use 15 years ago..... probably used 1/10th maybe...

Never use what the manufacturers supply, preferring to use my own..

That's great Arroin - If you can make it to/better than Rotax specifications.

 

As I pointed out, some posts back, there are lots of heat sink paste options in the marketplace. As a non technical person, I am "wedded" to Rotax specifications. This does not mean I always purchase from RoTAX but do use "stuff" that meets/exceeds the Rotax standards.

[skippydiesel]

4 hours ago, Moneybox said:

 

I'm not disagreeing with what you say, just your calculation 218.51/60 = $3.64/ml 🤪

Must  have punched some doggy buttons - yes $3.64/gm

[onetrack]

There's a big difference between grams and millilitres, you're comparing apples to oranges. Grams is weight measure, ml is volume measure.

You can have a vast difference in quantity for the same numerical amount, depending on the S.G. of the particular product.

[danny_galaga]

1 hour ago, onetrack said:

There's a big difference between grams and millilitres, you're comparing apples to oranges. Grams is weight measure, ml is volume measure.

You can have a vast difference in quantity for the same numerical amount, depending on the S.G. of the particular product.

Eg, a millilitre of mercury compared to a millilitre of air. And put another way, what volume does a gram of mercury occupy, compared to a gram of air.

[spacesailor]

A gram of mercury occupies how many millilitres. 

 " 0.074 millilitres "

spacesailor

[Red]

Yea but dont forget 1 millilitre of water has a mass of 1 gram, Ill bet the wacker paste isnt far off from that equivalence

[Freizeitpilot]

4 hours ago, Red said:

Yea but dont forget 1 millilitre of water has a mass of 1 gram, Ill bet the wacker paste isnt far off from that equivalence

2.1 g/cm3

WACKER CHEMICAL-54764_60003095-ENG-SDS_VD.pdf

[skippydiesel]

https://mgchemicals.com/downloads/tds/tds-860.pdf

[skippydiesel]

Ha Ha - told you so!😈

[danny_galaga]

13 hours ago, spacesailor said:

A gram of mercury occupies how many millilitres. 

 " 0.074 millilitres "

spacesailor

Damn, that's nearly as dense as me 😄

[onetrack]

So.... these often exorbitantly expensive heat transfer compounds are revealed in the TDS's, to contain nothing more than silicone oil, and zinc oxide as an inorganic, largely inert filler.

Both are relatively cheap - silicone oil is noted for its heat transfer properties, and zinc oxide is used widely in a large range of products, with sunscreen being a major user.

 

Silicone oil has been used in viscous fan clutch hubs for donkeys years, it's not exactly worth stealing, like catalytic converters are. So why the massive charges for this heat transfer compound as soon as it's labelled for aviation use? It sounds like the classic sideshow spielers have got into the heat transfer compound market.

 

Skippys on the mark - no point in being ripped off simply because Rotax recommend a certain brand of the product.

[skippydiesel]

4 hours ago, onetrack said:

 

Skippys on the mark - no point in being ripped off simply because Rotax recommend a certain brand of the product.

Thank you for your kind words sir.

 

As to the recipe containing fairly common cheap products - I guess  there is a degree of refining, meeting of standards, consistency and of course packaging & marketing the "sunscreen" which all adds up.

Then there will be the 100% ++ markup, to keep the kids in private school, the facilitate the annual overseas holiday and the new luxury car every 3 years or so.😈

[Red]

I expect if you nip down to your local Computer store (if you have one) you'd get a small tube for a reasonable price

[Red]

9 hours ago, Freizeitpilot said:

2.1 g/cm3

WACKER CHEMICAL-54764_60003095-ENG-SDS_VD.pdf 171.86 kB · 5 downloads

Oo thanks, much heavier than I thought

[skippydiesel]

14 hours ago, Red said:

I expect if you nip down to your local Computer store (if you have one) you'd get a small tube for a reasonable price

Problem is - does it meet/exceed Rotax specifications? Important to me, may be not to you.

 

"Not the sharpest tool in the shed" so am dependent on Rotax specifications, resulting in, the right product for the given job, even if I don't buy from Rotax.

[Arron25]

On 06/09/2024 at 8:12 AM, skippydiesel said:

Problem is - does it meet/exceed Rotax specifications? Important to me, may be not to you.

 

"Not the sharpest tool in the shed" so am dependent on Rotax specifications, resulting in, the right product for the given job, even if I don't buy from Rotax.

A few years ago Ford tried to void warranty if you did not use Genuine Ford filters until it was shown the 'genuine' were just repackage Commercially available filters.. Not made specially for Ford as claimed.

Manufacturer 'specifications' have MORE to do with Marketing and Brand Share than actual Hard and Fast specification requirements.

In this case..(and most others) as long as you are buy from a reputable supplier (ie not Online internet/facebook) the product will match or exceed anything with a pretty label stuck on it by a manufacturer.

[skippydiesel]

1 hour ago, Arron25 said:

A few years ago Ford tried to void warranty if you did not use Genuine Ford filters until it was shown the 'genuine' were just repackage Commercially available filters.. Not made specially for Ford as claimed.

 

For me a specification is not a brand or marketing tool.

 

Manufacturer 'specifications' have MORE to do with Marketing and Brand Share than actual Hard and Fast specification requirements.

 

Specifications are standards, that the engine manufacturer has determined, will "do the job"eg an oil hose peak/continues pressure, temperature, bend radius, etc  or in the case of heatsink past (just winging it) ingredients, ratios, temperature, conductivity, etc .

 

In this case..(and most others) as long as you are buy from a reputable supplier (ie not Online internet/facebook) the product will match or exceed anything with a pretty label stuck on it by a manufacturer.

 

How can you know that you are purchasing a product that is equal to or better than the one specified by Rotax, without comparing specifications?

Rotax offer some specifications , other times recommended manufacturer/product. For the latter it is usually possible to obtain the specifications from the manufacturer, for the recommended product eg Continental supply oil hose for Rotax 912 engines - you can only purchase the specific oil hose from Rotax BUT Continental kindly publises the performance specifications for the given hose, which can then be used to find an equal or better performing hose from an alternative reputable supplier eg Gates.