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Some 1/2a Time Today
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Page 1 of 2 • 1, 2 
Some 1/2a Time Today
microflitedude Sun Apr 01, 2012 10:11 pm
The PeeWee yesterday refused to go, the glow plug kept fouling with fuel. So today I though I would test my Cub with the new tank.
The receiver decided to fail as I got everything ready to go - spent 10 minutes pulling it out, checking all the servos, and rebinding RX. The good old Black Widow started right up.
I ran it with the muffler almost closed, about a 1/4" opening. I drove it around the backyard, until the prop hit a stick. 
I then held it in a few flying positions while running - it did seem to slow down a little bit. After setting it down, it quit. Not sure why, as there was still fuel in the tank line. Wouldn't start back up. It got very hot, to where drops of fuel would immediately boil off the head. (no airflow cooling I suppose)
It runs at about 3 to 3 and 1/2 turns out on the needle. RPM ranges it 6K to 14K. The whole setup I think is too heavy to fly properly.
Also vibrated a lot. Prop screw is suspect, then the prop. I just want to fly the stupid thing again. 
Wrenches on Ebay sold for a bit less than I had hoped for.
The receiver decided to fail as I got everything ready to go - spent 10 minutes pulling it out, checking all the servos, and rebinding RX. The good old Black Widow started right up.
I ran it with the muffler almost closed, about a 1/4" opening. I drove it around the backyard, until the prop hit a stick. I then held it in a few flying positions while running - it did seem to slow down a little bit. After setting it down, it quit. Not sure why, as there was still fuel in the tank line. Wouldn't start back up. It got very hot, to where drops of fuel would immediately boil off the head. (no airflow cooling I suppose)It runs at about 3 to 3 and 1/2 turns out on the needle. RPM ranges it 6K to 14K. The whole setup I think is too heavy to fly properly.
Also vibrated a lot. Prop screw is suspect, then the prop. I just want to fly the stupid thing again. Wrenches on Ebay sold for a bit less than I had hoped for.
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Re: Some 1/2a Time Today
engine049 Sun Apr 01, 2012 10:22 pm
Sounds like your fuel may be suspect. Every engine seems to be acting up I'd check that.
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Re: Some 1/2a Time Today
engine049 Mon Apr 02, 2012 4:32 pm
Sounds like water in fuel to me... I'm surprised more experts haven`t chimed in COUGH!
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Re: Some 1/2a Time Today
nitroairplane Mon Apr 02, 2012 7:32 pm
Thought you could handle it
I am no expert so you probably mean someone else.
Shake up the fuel, pour it into a clear container, the fuel should be clear with no clouds in it.
If it has clouds or you notice it begins to settle it is contaminated.
This will foul heads more quickly.
I am no expert so you probably mean someone else.
Shake up the fuel, pour it into a clear container, the fuel should be clear with no clouds in it.
If it has clouds or you notice it begins to settle it is contaminated.
This will foul heads more quickly.
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Re: Some 1/2a Time Today
RknRusty Mon Apr 02, 2012 8:56 pm
Fuel gets coagulated particles in it whether it's contaminated or not, even while you're not using it. I strain mine through two coffee filters once in a while, and wash out the bottle with straight alcohol(not the 70% kind), and dry it before refilling it. Look at the smuck you filtered out through a magnifying glass, it's gooky. Those are expert terms. Do not try to use them at home.
My glowplugs have been behaving much better since I strained that suspect bottle of SIG 35.
Try to never shake your fuel while using it. All the sediment stays on the bottom. Shaking it is as bad as buying gas for your car while the fuel truck is filling the underground tanks.
My glowplugs have been behaving much better since I strained that suspect bottle of SIG 35.
Try to never shake your fuel while using it. All the sediment stays on the bottom. Shaking it is as bad as buying gas for your car while the fuel truck is filling the underground tanks.
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Re: Some 1/2a Time Today
microflitedude Tue Apr 03, 2012 10:07 am
I have strained it through coffee filters, I suppose it is time again.
On a side note, I have some Traxxas 25% car fuel, can I spike it with some castor and use it? It works, I have used a tiny bit while working on motors. The bottle says for car engines only.
On a side note, I have some Traxxas 25% car fuel, can I spike it with some castor and use it? It works, I have used a tiny bit while working on motors. The bottle says for car engines only.
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Re: Some 1/2a Time Today
dankar04 Tue Apr 03, 2012 11:42 am
microflitedude wrote:I have strained it through coffee filters, I suppose it is time again.
On a side note, I have some Traxxas 25% car fuel, can I spike it with some castor and use it? It works, I have used a tiny bit while working on motors. The bottle says for car engines only.
Just spike it with castor. They run car engines with low amount of oil to get max power out of them. Advice 101, never buy a used RC car engine unless you know the owner.
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Re: Some 1/2a Time Today
PV Pilot Tue Apr 03, 2012 11:55 am
microflitedude wrote:Fuel is soooooo expensive....
It is very expensive,,your biggest hobby cost with nitro burners is fuel.
If you own a big Nitro heli,,forget about it. Those things are zinging at 90%+ of top rpms most of the time. Buy a shrink wrapped pallet of boxed fuel,,you will be better off. One of my flying buddys does that, said he burned 40+ gallons just learning to hover steady (taught himself with no Sim time at all).
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Re: Some 1/2a Time Today
microflitedude Tue Apr 03, 2012 12:06 pm
Yeah, nitro helicopters is something I will never get into. Same goes for Kero jets.
That is great news. I bought a gallon's worth for a nitro truggy, and the truggy never ran. Good thing the truggy was free. It's got one of those evil TRX .15's.
Now the question is, how much oil? I can't find the fuel percentages anywhere.
That is great news. I bought a gallon's worth for a nitro truggy, and the truggy never ran. Good thing the truggy was free.
It's got one of those evil TRX .15's.Now the question is, how much oil? I can't find the fuel percentages anywhere.
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Re: Some 1/2a Time Today
andrew Tue Apr 03, 2012 12:16 pm
PV Pilot wrote: One of my flying buddys does that, said he burned 40+ gallons just learning to hover steady (taught himself with no Sim time at all).
THAT must have been an expensive exercise.
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Re: Some 1/2a Time Today
nitroairplane Tue Apr 03, 2012 12:18 pm
Lucky I learned to hover on a micro electric
Nitro helis, I am supposed to be getting one soon.
Nitro helis, I am supposed to be getting one soon.
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Re: Some 1/2a Time Today
dankar04 Tue Apr 03, 2012 12:39 pm
nitroairplane wrote:Lucky I learned to hover on a micro electric
Nitro helis, I am supposed to be getting one soon.
The new Mico-Heli's electric are great fun. Litte Symra S107G fly wonderful with 3ch./ Driftking 4ch is even better. Then got 9958 4ch 2.4 fixed 2 blade and its flys better than I can do right now , but getting there. What I like you don't need to worry about what outside conditions are. I know off topic but another toy to play with.
Dan
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Re: Some 1/2a Time Today
nitroairplane Tue Apr 03, 2012 12:48 pm
I love the Blade MSr it was great.dankar04 wrote:nitroairplane wrote:Lucky I learned to hover on a micro electric
Nitro helis, I am supposed to be getting one soon.
The new Mico-Heli's electric are great fun. Litte Symra S107G fly wonderful with 3ch./ Driftking 4ch is even better. Then got 9958 4ch 2.4 fixed 2 blade and its flys better than I can do right now , but getting there. What I like you don't need to worry about what outside conditions are. I know off topic but another toy to play with.
Dan
I would like to get a blade mCPX and may get one in a trade.
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Re: Some 1/2a Time Today
dankar04 Tue Apr 03, 2012 1:06 pm
Like I said these little Mico-Heli's are great fun. Blade makes some nice little Heli's also. Xieda 9958 is amazing and mine was $30.94 price tag..bought two of them.
Dan
Dan
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Re: Some 1/2a Time Today
PV Pilot Tue Apr 03, 2012 1:09 pm
andrew wrote:PV Pilot wrote: One of my flying buddys does that, said he burned 40+ gallons just learning to hover steady (taught himself with no Sim time at all).
THAT must have been an expensive exercise.
It was. Pesky trees kept eating the copter and the spendy carbon fiber blades, along with heads, gears, ect.
He is a master now with the copter, when he is in the zone, both radio sticks are swirling mayhem.
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Re: Some 1/2a Time Today
John Goddard Tue Apr 03, 2012 3:31 pm
microflitedude wrote:Yeah, nitro helicopters is something I will never get into. Same goes for Kero jets.
That is great news. I bought a gallon's worth for a nitro truggy, and the truggy never ran. Good thing the truggy was free.
Now the question is, how much oil? I can't find the fuel percentages anywhere.
On here somewhere Matt is an excell program that I think Bernie listed for calculating oil ratios
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Re: Some 1/2a Time Today
John Goddard Tue Apr 03, 2012 3:37 pm
microflitedude wrote:Yeah, nitro helicopters is something I will never get into. Same goes for Kero jets.
That is great news. I bought a gallon's worth for a nitro truggy, and the truggy never ran. Good thing the truggy was free.
Now the question is, how much oil? I can't find the fuel percentages anywhere.
Found it, look 3/4's down first page,-
http://coxengines.ca/files/FG.pdf
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Re: Some 1/2a Time Today
microflitedude Tue Apr 03, 2012 6:45 pm
John Goddard wrote:microflitedude wrote:Yeah, nitro helicopters is something I will never get into. Same goes for Kero jets.
That is great news. I bought a gallon's worth for a nitro truggy, and the truggy never ran. Good thing the truggy was free.
Now the question is, how much oil? I can't find the fuel percentages anywhere.
Found it, look 3/4's down first page,-
http://coxengines.ca/files/FG.pdf
Thanks, but that isn't the problem. The problem is, I can't find the percentages of the ingredients in Traxxas Top Fuel.
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Re: Some 1/2a Time Today
PV Pilot Wed Apr 04, 2012 11:20 am
microflitedude wrote:John Goddard wrote:microflitedude wrote:Yeah, nitro helicopters is something I will never get into. Same goes for Kero jets.
That is great news. I bought a gallon's worth for a nitro truggy, and the truggy never ran. Good thing the truggy was free.
Now the question is, how much oil? I can't find the fuel percentages anywhere.
Found it, look 3/4's down first page,-
http://coxengines.ca/files/FG.pdf
Thanks, but that isn't the problem. The problem is, I can't find the percentages of the ingredients in Traxxas Top Fuel.
And you wont find those, because it is proprietary information. They don't want to give out there formula. No fuel company lists much more than oil content and either syn or natural castor, and thats where the trail ends. They wont give out the antifoamers or buffers or extra snake oil lubes they add.
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Re: Some 1/2a Time Today
John Goddard Wed Apr 04, 2012 11:41 am
I've just read their website
Hilarious
Pour it away quickly
Hilarious
Pour it away quickly
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Re: Some 1/2a Time Today
PV Pilot Wed Apr 04, 2012 11:46 am
That being said, I just found a blurb stating that Traxxas top fuel is 16% oil and it is a castor synthetic blend. Mixed by Powermaster fuel (and then whoever mixes fuel for Powermaster) for Traxxas.
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Re: Some 1/2a Time Today
microflitedude Wed Apr 04, 2012 12:50 pm
If I knew just the oil content, could I figure it out how much to add?
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Re: Some 1/2a Time Today
John Goddard Wed Apr 04, 2012 1:14 pm
Do you know the nitro content as well?
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Re: Some 1/2a Time Today
PV Pilot Wed Apr 04, 2012 1:38 pm
Well, Traxxas Top Fuel used to be 33% nitro, They might have backed that down a bit or made a lesser concentration.
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