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Post  Admin Mon Jun 03, 2019 10:50 pm

Vote on your favorite engine! Poll will run for 5 days!




1
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"cox 049 gasoline"


2
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"This is no show queen!"


3
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"Circle Track Race Engine 049"


4
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"TD .049"


5
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"Delta"


6
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"Estes powered by a Babe Bee"


7
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"To Infinity and BEYOND"


8
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"Nostalgic dawn of a Cox .010"


9
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10
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"Space Bug Jr’s!"

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Post  getback Sun Jun 09, 2019 8:50 am

Hello i think we have a wienner Small Cox Logo Babe Bee .049 Small Cox Logo
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Post  robot797 Sun Jun 09, 2019 10:06 am

yay my firsth win
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Post  Marleysky Sun Jun 09, 2019 1:14 pm

@robot797 wrote:yay my firsth win

Congratulations, that is quite the engine and deserves an award!

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Post  balogh Sun Jun 09, 2019 2:29 pm

Congrats robot797, well deserved.

You owe us a video about how that engine runs! Very Happy
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Post  robot797 Sun Jun 09, 2019 2:39 pm


here you go
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Post  Kim Sun Jun 09, 2019 2:43 pm

Congrats Robot!
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Post  akjgardner Sun Jun 09, 2019 2:49 pm

@robot797 wrote:
here you go
That's Too Cool.....Congrats
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Post  balogh Sun Jun 09, 2019 2:56 pm

Great video Robot. What % oil did you have in the fuel? Apart from the natural cooling of the large heat sink mounted on the engine head, did you use some firced ventilation too? That engine must have run very hot.
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Post  robot797 Sun Jun 09, 2019 2:58 pm

i beleve i used 20 or 25% oil
half syntetic half castor
and it ran only a few degrees above nitro temp
and what amazed me most is that it hardly used fuel
(what did i expect with the needle only 0.5-0.75 turns opened)
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Post  balogh Sun Jun 09, 2019 3:14 pm

Thanks. Yes the calorific value of gasoline (43MJ/kg) is more than twice that of the methanol (19.9MJ/kg) so the fuel-air mixture is much leaner and fuel consumption is much less with gasoline.
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Post  MauricioB Sun Jun 09, 2019 3:45 pm

Congratulations Robot! ... Clapping Clapping
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Post  Admin Sun Jun 09, 2019 3:54 pm

We have a WINNER!!! Clapping

Congratulations to robot797 and his "cox 049 gasoline"

**VOTE-ON-THE-NEXT-COX-ENGINE-OF-THE-MONTH** (June 2019) 1_robo10

I'll have the picture up shortly!

Stay tuned for the Ex Model Engines Black Lynx .049 engine drawing! Thumbs Up

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Post  robot797 Sun Jun 09, 2019 4:22 pm

thank you all for voting on me
also be prepaired to see more of this
I am building a gasoline boat with it
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Post  1/2A Nut Mon Jun 10, 2019 1:29 am

Fun stuff way to go Robot congratulations! Thumbs Up

Post a vid of the boat running we would like to see that!

Beer Cheers

Here is a .05 engine powering my 1/2A outrigger hydro design. Old Bugger


Published on Oct 9, 2016

1st Run - Picco P-Zero Outrigger Hydro Profi Tuned Pipe
.85cc / .050 cu. in. / 1/2A car engine converted for boat use.
Very stable, needle valve set a bit rich for the first few
runs, need to lower the strut a bit, tracks very well.  
Will do another vid after I tweak the setup.
Stock X427 / 20% castor 30% Nitro. Per Doppler
reading best pass 62.25 Kph or 38.68 mph pitch speed / 27,290 rpm
Looked like around 35 after trimming it out.


Popcorn  Thumbs Up


Last edited by 1/2A Nut on Mon Jun 10, 2019 4:40 am; edited 1 time in total
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Post  Davenz13 Mon Jun 10, 2019 4:00 am

Well done Robot.
As stated earlier a most deserving win. Thumbs Up
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Post  getback Mon Jun 10, 2019 9:03 am

Good Job Robot , heck i still havent won one Sad but that's OK having fun is all its about Very Happy CONGRATULATIONS !! cheers cheers cheers
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Post  Tee Bee Mon Jun 10, 2019 4:36 pm

Congrats Robot797! Very interesting project!
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