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Old Apr 05, 2011, 07:44 PM
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Yes

Quote:
Originally Posted by JohnAV8R View Post
See
http://msds.chem.ox.ac.uk/DI/diethyl_ether.html
for the toxicity of ether.

ORL-MAN LDLO 260 mg kg-1
ORL-RAT LD50 1215 mg kg-1

The lethal dose to kill half the test population is
260 mg/kg of body weight for man and
1215mg or 1.2 g/kg of body weight for rats.
So how many mls kills a normal man?
Im guessing a thimble full in a small glass of orange juice would be non lethal

Im going to try a .4mm shim under my fix comp head just as a start , dont want to be overcompressed
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Old Apr 05, 2011, 09:49 PM
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Quote:
Originally Posted by NX-687 View Post
So how many mls kills a normal man?...
.26 x 70 = 18 gram, 18/0.71 = 25 ml. This is supposed to kill half of a 70 kg man
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Old Apr 05, 2011, 09:57 PM
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Quote:
Originally Posted by NX-687 View Post
So how many mls kills a normal man?
Im guessing a thimble full in a small glass of orange juice would be non lethal

Im going to try a .4mm shim under my fix comp head just as a start , dont want to be overcompressed
The scientists estimate a lethal dose of castor oil is between one and two pints. But I can pretty much guarantee that a normal human cannot ingest that much and keep it down very long. it will very likely come back out quickly. Besides the stuff tastes terrible and smells funky too. maybe something for those idiot reality shows or something like that jack$$$ movie.

Castor oil has numerous medicinal purposes, not just to cleanse the bowels out.
ref http://www.castoroilhome.com/

In one study they fed mice a diet of 5% or 10% castor oil in their food by weight. It didn't hurt the mice at all as far as they could tell.
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Old Apr 06, 2011, 05:55 PM
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The lethal dose to kill half the test population is
260 mg/kg of body weight for man and
1215mg or 1.2 g/kg of body weight for rats.
So how many mls kills a normal man?
Im guessing a thimble full in a small glass of orange juice would be non lethal

100x 260 mg/kg, so for a person of 100 x1 kg, you weigh 100 kg, 220 lbs, then 26000mg =26g, or by weight, about 1 oz, 28g/oz
Used as an anesthetic, breathing in the vapour, I think you would be fast asleep before
you were able to finish your "shot".
Still, there are those that will drink a drop.
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Old Apr 06, 2011, 09:03 PM
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I think you are mixing up the poison ricin which is derived from the castor oil beans.
it is was that little, castor oil would have poisoned countless people over the centuries.
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Old Apr 06, 2011, 09:23 PM
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Quote:
Originally Posted by earlwb View Post
I think you are mixing up the poison ricin which is derived from the castor oil beans.
We're actually discussing ether as a recreational drink.
Ricin kills at a very low dose of 1mg/kg.
JohnAv8r' 100kg man would be killed by only 0.1 gram of ricin.
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Old Apr 07, 2011, 04:54 AM
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Update

I got a little more compression out of my OS15 glow to diesel conversion

the problem is the baffle in the piston has to be a close fit on the corresponding head cutaway and the anti-rotation contra piston system has to have minimum volume , maybe this is why the original OS 15 Diesel was not very powerful
It might move my plane tomorrow , maybe enough to send the plane in and chew up the lines , we will see ,

I have a fixed compression head I will use if the plane wont take off , but I dont know how much compression its got

The fixed head has no fins , that may be important , I may have to make another ?
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Old Apr 07, 2011, 06:30 AM
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Quote:
Originally Posted by JMP_blackfoot View Post
We're actually discussing ether as a recreational drink.
Ricin kills at a very low dose of 1mg/kg.
JohnAv8r' 100kg man would be killed by only 0.1 gram of ricin.
Ok, my error. Sorry. My apologies, I thought we were still talking about castor. I missed the change.
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Old Apr 07, 2011, 03:51 PM
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NX-687, "the problem is the baffle in the piston"....so file it down half way and make a variable compression head, or at least try getting a little more compression.
What size prop are you using? If an 8x4 (small) try a 9x4 , then a 10x4. Lug the engine down and note whether or not it has more pull. If it starts, then it runs, so lets get it working.
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Old Apr 07, 2011, 05:23 PM
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NX-687, I think johnav8r has a point. You likely need the baffle cut down and a little more compression. I don't remember any of the model diesel engines having baffles on the piston. It isn't to say they did, I just haven't seen one yet. Now some engines had high compression heads that were sold for them, mainly for 0% nitro glow fuels.

You could also try increasing the ether percentage in the fuel. The old Drone engines used 75% ether and 25% mineral oil, no kerosene. They were a fixed compression diesel engine. But didn't have as high of a compression ratio as regular adjustable engines did and turned low RPMs, but they'd turn either a large prop or a high pitched prop like a 11x10 size for example with control line.
So maybe something in between the regular ether content and 75% ether content would work better.
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Old Apr 07, 2011, 07:45 PM
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Yo

had about 7 flights this morning report to follow,

used both adjustable and fixed comp head ,
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Old Apr 08, 2011, 07:16 AM
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Report

Morning fly

Piston baffle is a mild steel piece 3mm high and 0.7mm thick , silver soldered onto the top of the piston ,
Starting is about 20 flicks with 2 venturi primes in between , it took about 4/5 flights to get the needle setting right , has good power

Fuel is 30/30/30

prop is 9x5 Master
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Old Apr 08, 2011, 09:52 AM
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Cool. Nice job. Thanks for sharing.
I like your cylinder head. Looks like you are near maximum for the compression ratio.
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Old Apr 08, 2011, 04:18 PM
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NX-687, looks good. Nice going.
Now that you've had a few flights, how does the diesel compare to the glow, assuming you have tried both on the same plane. Are you using 52 or 60 ft lines?
John
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Old Apr 08, 2011, 05:03 PM
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Hi John and Earl

Ive got 65 feet of 12 thou on there

Power seems the same as a glow or maybe even better , Im a bit surprised to say and why it starts with all that compression I wont know,

it doesn't bog down in tight figure 8,s, it sort of chugs through

It could probably benefit from head fins ,,,, although with the needle set lean it just burps a little and shows no sign of overheating and slowing down , and sort of burning down and ruining itself , like the glows ,

What is the head running temperature for diesels is it the same as glows

from memory Bob Gierke said it was 215 C
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