High octane vs Standard Unleaded

[Eddy_t]

Lol me and the 150/261 have been sipping aspen to gently bed them in 👍

 

261?! On aspen? Does it make the 261 work? In fact does anything? 150 is awesome on aspen, just takes a little drip to run, the fuel lasts forever, I'm still on break in with it!

 

 

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[Dan Earp]

Still breaking them in, got the 261 on aspen as im looking to fix my 260, so will be used as and when. Ran 2 tanks in each today, looking to get a 661 running on it aswell lol

[Eddy_t]

I'd hurry and fix the 260, or get a husky, get rid of the awful 261, it amazes me a company can produce such poor saws to replace their most sold models, (201/261/362 being so poor in comparison)

 

 

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[Dan Earp]

I'd hurry and fix the 260, or get a husky, get rid of the awful 261, it amazes me a company can produce such poor saws to replace their most sold models, (201/261/362 being so poor in comparison)

 

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Do not swear at me Mr Ed, stihl through and through here

[Eddy_t]

Do not swear at me Mr Ed, stihl through and through here

 

You haven't seen the light yet

 

 

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[Dan Earp]

You haven't seen the light yet

 

 

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O yes i did😜 and walked straight past all the other sub standard makes lol

[TimberCutterDartmoor]

Oddly Rudolph's aim was to counter the shock that spark ignition engines suffered with poor fuels by introducing the fuel gradually rather than premixed.

 

Hmmm, almost! You are right in that he wasn't concerned with sparkless ignition (that was akroyd stewart) rather, pure adiabatic compression as you have said was desired to create a constant pressure vs a constant volume in the cylinder, and furthermore using vegetable oil or pulverised coal dust.

[openspaceman]

Hmmm, almost! You are right in that he wasn't concerned with sparkless ignition (that was akroyd stewart) rather, pure adiabatic compression as you have said was desired to create a constant pressure vs a constant volume in the cylinder, and furthermore using vegetable oil or pulverised coal dust.

 

It was the expansion under constant pressure that he was looking at, to reduce shock loads. Though he considered coal dust and some sort of lock hopper I didn't think he used it, opting for peanut oil instead. I think Sulzer went into production for him first.

 

He was using an aerosol ( compressed air) to inject it and this robbed some of the volumetric efficiency. I imagine this was because high pressure liquid pumps were hard to make and maintain. Again this problem of injection into a high pressure was one reason for the use of semi diesels, particularly in boats.

 

Internal Fire museum in Wales is the place to look at some of these early designs and Paul can talk one through all the developments.

[Eddie@aspen]

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We have a letter from Stihl dated 26/02/2009

 

That Aspen fuel does not affect warranty on Stihl products.

 

Signed Hans Fairley.

 

Every Husqvarna 2-stroke is run on Aspen in the factory

[Eddy_t]

You're buggered now though Eddie, stihl have decided to introduce motomix to the market, still, a bit of healthy competition

 

 

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