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Post  Jason_WI Wed Feb 20, 2013 11:40 pm

All this talk of seeing how fast we can get the Cox .049 reed valve engine to run on a 5x3 prop got me thinking of having a Texaco duration slow race.

The goal would be to see how slow in RPM and long duration we can get a Texace style engine to run on a Cox grey 8x4 prop and 8cc of fuel.

Not sure what fuel yet but a lower nitro would be best so maybe 15% nitro.

Looking to see if there is any interest in this.
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Post  John Goddard Thu Feb 21, 2013 3:21 am

Sign me up Jason
Very Happy
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Post  pkrankow Thu Feb 21, 2013 7:31 am

Maybe, dunno. I run 15% so I at least have the right fuel for this one.

I have a few ideas at least...

Phil
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Post  WingingIt74 Thu Feb 21, 2013 7:32 am

Sounds fun!
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Post  Cribbs74 Thu Feb 21, 2013 8:13 am

I'm in.
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Post  duke.johnson Thu Feb 21, 2013 8:25 am

Wish I had a Texaco. Sad
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Post  WingingIt74 Thu Feb 21, 2013 8:26 am

Jason_WI wrote: Texace style engine to run on a Cox grey 8x4 prop and 8cc of fuel.

What about a Texaco Jr?
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Post  pkrankow Thu Feb 21, 2013 8:48 am

duke.johnson wrote:Wish I had a Texaco. Sad

Build one! I don't own a Texaco either, but I have parts to select from spanning decades.

Phil
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Post  microflitedude Thu Feb 21, 2013 8:49 am

Rules?
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Post  pkrankow Thu Feb 21, 2013 8:51 am

WingingIt74 wrote:
Jason_WI wrote: Texace style engine to run on a Cox grey 8x4 prop and 8cc of fuel.

What about a Texaco Jr?

I like this idea a little better.

Phil
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Post  WingingIt74 Thu Feb 21, 2013 8:52 am

Shouldn't matter as long as it's a texaco with a tank lol!
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Post  microflitedude Thu Feb 21, 2013 8:55 am

Does it have to be original? Built from parts? Can any parts be changed or modified?
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Post  Cribbs74 Thu Feb 21, 2013 9:06 am

Jason needs to confirm, but seeing as this is a duration race then the tank size would be a big player. Maybe a 5cc and an 8cc class?
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Post  pkrankow Thu Feb 21, 2013 9:21 am

Duration?
RPM?
a combination of both?

How will the fuel metering be done for fairness? 5cc vs 8cc? Hard starts?

What are allowable modifications in stock, and super stock? Do they have to be on fuel tanks or are remote tanks allowable? At what point does an engine become "unlimited"?

Would "stock" be simply putting a "texaco" back on a bee or would this require an actual "texaco" engine?

I propose an otherwise stock or assembled engine is "super stock" Using a single bypass, double bypass, with or without boost ports. Use of a fixed intake restricter would be allowed? Would fixed exhaust restricters be allowed?

Unlimited?

Phil
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Post  WingingIt74 Thu Feb 21, 2013 9:30 am

Technically I think any engine could enter... most are not able to run really slow.
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Post  John Goddard Thu Feb 21, 2013 10:49 am

WingingIt74 wrote:Technically I think any engine could enter... most are not able to run really slow.

Bang on Travis Very Happy

I think keeping the blighter running at all under 5k is an achievement regardless how it's done.
Cold
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Post  microflitedude Thu Feb 21, 2013 10:56 am

Throttle?
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Post  WingingIt74 Thu Feb 21, 2013 10:57 am

I would say not.
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Post  Cribbs74 Thu Feb 21, 2013 11:01 am

Yes an engine can run slow....... It all has to do with porting and venturi size. Possibly head shimming as well. The 10x6 helped a little....... Wink

Yeah we can over prop an engine to slow it down, but I bet a mouse engine won't do 3K with a 10x6

https://www.coxengineforum.com/t4227-space-bug-jr-10x6?highlight=Space+bug+jr






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Post  WingingIt74 Thu Feb 21, 2013 11:12 am

I think it was already said on using a 8x4 texaco prop Smile no 10x6

I have a antique 14" prop can I use that? lol!
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Post  Cribbs74 Thu Feb 21, 2013 11:15 am

I realize that..........you said just about any engine could enter which I disagree, John said any engine running under 5K is a feat no matter how it's done.

The point is not every engine can run slow.

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Post  WingingIt74 Thu Feb 21, 2013 11:21 am

cribbs74 wrote:The point is not every engine can run slow.


I thought I said that...
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Post  Cribbs74 Thu Feb 21, 2013 11:32 am

WingingIt74 wrote:Technically I think any engine could enter... most are not able to run really slow.

No, you said the above. Which I took as written.

Why would you want to enter any engine that's not designed for duration? If you run out of fuel quickly you lose. If you turn the prop quickly you run out of fuel quicker and again you lose.

Not every engine is a duration engine.

If I am misunderstanding something set me straight! Very Happy
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Post  WingingIt74 Thu Feb 21, 2013 11:37 am

WingingIt74 wrote:Technically I think any engine could enter... most are not able to run really slow.
cribbs74 wrote:The point is not every engine can run slow.

Doesn't that say the same thing?


Last edited by WingingIt74 on Thu Feb 21, 2013 2:00 pm; edited 1 time in total
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Post  Cribbs74 Thu Feb 21, 2013 11:49 am

The second part does. The sentence above that does not.

I said If I am misunderstanding something please let me know. By saying any engine could enter do you mean any Texaco or any engine in general?

Feel free to shoot me a PM so we don't bung up this thread.

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