Apr 05, 2011, 07:44 PM
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# Yes

Quote:
 Originally Posted by JohnAV8R 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
Last edited by NX-687; Apr 05, 2011 at 07:47 PM. Reason: Add
Apr 05, 2011, 09:49 PM
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Quote:
 Originally Posted by NX-687 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
Apr 05, 2011, 09:57 PM
Registered User
Quote:
 Originally Posted by NX-687 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.
 Apr 06, 2011, 05:55 PM Registered User Thread OP 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.
 Apr 06, 2011, 09:03 PM Registered User 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. Latest blog entry: My Diatone Spadger ET-150 FPV quad racer
Apr 06, 2011, 09:23 PM
Registered User
Quote:
 Originally Posted by earlwb 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.
Apr 07, 2011, 04:54 AM
Registered User

# 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 ?
Last edited by NX-687; Apr 07, 2011 at 06:39 AM. Reason: Add
Apr 07, 2011, 06:30 AM
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Quote:
 Originally Posted by JMP_blackfoot 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.
 Apr 07, 2011, 03:51 PM Registered User Thread OP 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.
 Apr 07, 2011, 05:23 PM Registered User 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. Latest blog entry: My Diatone Spadger ET-150 FPV quad racer
Apr 07, 2011, 07:45 PM
Registered User

# Yo

Apr 08, 2011, 07:16 AM
Registered User

# 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

### Images

Last edited by NX-687; Apr 08, 2011 at 07:17 AM. Reason: Add
 Apr 08, 2011, 09:52 AM Registered User Cool. Nice job. Thanks for sharing. I like your cylinder head. Looks like you are near maximum for the compression ratio. Latest blog entry: My Diatone Spadger ET-150 FPV quad racer
 Apr 08, 2011, 04:18 PM Registered User Thread OP 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
Apr 08, 2011, 05:03 PM
Registered User

# 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