Turbo wanted, puny ones need not apply! >:(

[therecklessengineer]

I will look around on ebay for a decent 2nd hand one and avoid the Chinese ones.

Have a look at these guys: www.r-techwelding.co.uk

The price of chinese sets and the backup of a UK dealer. I bought my TIG set from them, excellent customer service.

To run it off bio or veg I think the fuel needs to be pressurised and atomised, otherwise it probably won't burn properly. It would mean adding some sort of compressed air into the fuel system and some sort of injector.

Indeed it does, and while it can be done with compressed air, a domestic oil burner offers a much simpler solution.

You have to be careful of 'turbine runaway' when running on liquid fuels. So called, because if it happens, you run away. Quickly. It occurs when the fuel pools in the bottom of the combustion chamber and burns uncontrollably - because it's already in there you loose control of the turbine speed and it will keep accelerating until it either runs out of fuel or comes apart. I believe the done thing is to have a throttle on the inlet when running on liquid fuels so you can shut off the air.

[greasemonkey]

and Pete is currently working on a valve type pulse jet powered lawn mower.  This is truely insane with 80% the power of the buzzing bomb!!

That is not such a crazy idea. I would imagine that the power to weight ratio of a jet engine would be far greater than a piston engine.
I mow lawns for a living, among other things.
My mower is 33KG, it's a heavy domestic mower. I need something a good bit more powerful and stronger, like a commercial mower. Trouble is, any heavier, and it's just too heavy. Almost every lawn I have is either steep, or has access up or down steps, or over a wall. I just can't go any heavier.
Something with twice the power, and a maximum of 20KG would be ideal.

So long as it doesn't require half the neighbourhood to wear ear defenders, and doesn't frighten the customer with huge flames or banging noises, there would be a big market for something like that.

[Head Womble]

I'll speak to the guy that runs the lorry workshop at work, he may have an old one kicking about.

[kamaangir]

hanks Mark, and if you happen to come across any steel tubing, 6" 4" or 3" I would also appreciate it cheers.

James

Been looking at that site for welders, some nice bits of kit there! I can't find any cheap oil fired boilers to cannibalise and the pumps seem quite expensive. I am guessing a gear pump from an electric power steering pump will do it.

I have seen exactly what you are talking about on a video of a Rolls Royce engine when they got the firing sequence wrong, it was spewing out fuel! Considering it uses 90 Gallons at  idle and 2500 on full thrust it was rather a lot of fuel being spewed out! Probably not as much as the brown matter deposited in the trousers of the operators! hahaha

I will have a couple of twin tanking valves that I could use to rig up some sort of shut off and cut the fueling.
I think I will still need a flame in there like a propane torch type thing to ignite the veg/bio.

[kamaangir]

and Pete is currently working on a valve type pulse jet powered lawn mower.  This is truely insane with 80% the power of the buzzing bomb!!

That is not such a crazy idea. I would imagine that the power to weight ratio of a jet engine would be far greater than a piston engine.
I mow lawns for a living, among other things.
My mower is 33KG, it's a heavy domestic mower. I need something a good bit more powerful and stronger, like a commercial mower. Trouble is, any heavier, and it's just too heavy. Almost every lawn I have is either steep, or has access up or down steps, or over a wall. I just can't go any heavier.
Something with twice the power, and a maximum of 20KG would be ideal.

So long as it doesn't require half the neighbourhood to wear ear defenders, and doesn't frighten the customer with huge flames or banging noises, there would be a big market for something like that.

I hope this answers your question:

https://www.youtube.com/watch?v=HpbKGvjqsxM

hahahaha

[lozzzzzz]

That is so funny! What a nutter!

[greasemonkey]

and Pete is currently working on a valve type pulse jet powered lawn mower.  This is truely insane with 80% the power of the buzzing bomb!!

That is not such a crazy idea. I would imagine that the power to weight ratio of a jet engine would be far greater than a piston engine.
I mow lawns for a living, among other things.
My mower is 33KG, it's a heavy domestic mower. I need something a good bit more powerful and stronger, like a commercial mower. Trouble is, any heavier, and it's just too heavy. Almost every lawn I have is either steep, or has access up or down steps, or over a wall. I just can't go any heavier.
Something with twice the power, and a maximum of 20KG would be ideal.

So long as it doesn't require half the neighbourhood to wear ear defenders, and doesn't frighten the customer with huge flames or banging noises, there would be a big market for something like that.

I hope this answers your question:

https://www.youtube.com/watch?v=HpbKGvjqsxM

hahahaha

I was thinking of something a little less, um, conspicuous.....

[Head Womble]

Sorry mate, no luck with the turbo, they all go back as exchange units.

But I do have the old one I took off the merc, it's in bits but I think I can remember how to put it back together.

[photoman290]

the biggest problem you will have is keeping enough oil flow to the bearings. the rest is easy. you need a lot of oil flow to stop the whole thing seizing up as it gets hot. i had a play with them some years ago. there is a Canadian guy who has done a lot of work on getting them to run for more than a few seconds.  not sure about colin furze. he seems a bit shall we say reckless? if you want something with the gee whizz factor for the BBB how about a pulse jet. much easier. a bit of pipe a bit of etched spring steel for a reed valve and a fuel supply. dangerous very hot and also unbelievably noisy. just what you want for a quiet weekend in the country.

[kamaangir]

Sorry mate, no luck with the turbo, they all go back as exchange units.

But I do have the old one I took off the merc, it's in bits but I think I can remember how to put it back together.

No probs Mark, just keep an eye out for some steel tubing if you can thanks mate.

[kamaangir]

the biggest problem you will have is keeping enough oil flow to the bearings. the rest is easy. you need a lot of oil flow to stop the whole thing seizing up as it gets hot. i had a play with them some years ago. there is a Canadian guy who has done a lot of work on getting them to run for more than a few seconds.  not sure about colin furze. he seems a bit shall we say reckless? if you want something with the gee whizz factor for the BBB how about a pulse jet. much easier. a bit of pipe a bit of etched spring steel for a reed valve and a fuel supply. dangerous very hot and also unbelievably noisy. just what you want for a quiet weekend in the country.

Hmmm I can probably get the oil pressure and flow sorted using some sort of gear pump. I am trying to get the fuelling design sorted. How to run it on veg that is the question! I think a propane flame would be put out by the compressed air. I will experiment with some nozzles.

[oakwoodtv]

 keep an eye out for some steel tubing if you can thanks mate.

I have a 4 foot length of 3 1/2 inch steel pipe if you can arrange collection.

Richard.

[Jamesrl]

I have a 4 foot length of 3 1/2 inch steel pipe if you can arrange collection.

Richard.

I could pick that up when I come up for the drums, that'll get it closer for him, I've got someone coming up to me soon who might be able to get it even closer.

[kamaangir]

That would be great! I don't want this to go the way of my other projects, i.e all enthusiasm for a week and then it all fizzes out! 

I hope to get it working by the BBB.

[oakwoodtv]

I may have the drums next week also have some 1 inch BSP nipples for you if required plus one or other bits.
Will let you know ASAP.