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» Cox engine .049 r/c & COX FUN MODEL
by MauricioB Yesterday at 1:03 pm

Cox Engine of The Month
September-2020
sosam117's

"Traded an electric charger for this "Complete" (original) Cox Thimble Drome Olympic .15 engine. Right corner is photo as received."



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Post  MauricioB on Tue Sep 15, 2020 11:16 am

After enjoying my Baronnet models, with .049 engines, one is a Killer Bee and the other I call it Cox Special, both .049, I decided to continue building engines with some available parts that I had new in stock.
So with a Black Widow cylinder, a Sure Star plate, a Babe Bee crankcase, the engine was assembled in one piece. The result was really very good, with a rev range ranging from 4500 rpm to 15150 rpm, this is very very good, as it allows many low and high revving flight attitudes.
After banking the engine, then, I am thinking of making a model for him ...
Each Cox engine that I start generates a lot of enthusiasm, and therefore I want to make many models to accompany each engine, it is so much enthusiasm that time becomes almost the most important thing to be able to carry out each project.
For now I share a video then, with this beautiful simple engine, which has incredible potential for action ....!
Cox engine .049 r/c & COX FUN MODEL 20200933


Last edited by MauricioB on Thu Sep 17, 2020 10:13 am; edited 1 time in total
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Post  MauricioB on Thu Sep 17, 2020 10:12 am

Well, here I am again, I have finished this drawing then, I already have everything in these lines to start cutting pieces and putting together this new plane, but first I tell you what it is:
Based on the Baronnet fuselage, which is very simple to build and lightweight, I decided to create a low wing. Then I have reformed the fuselage of that model (Baronnet) so that a lower wing can be placed, the horizontal stabilizer is the same as that of the Baronnet itself, the rudder, it is to my personal taste, as for the wing, it is a profile of a circular flight model for Cox .049 flying at 14 years old, it is a Barnstormer 1/2 A Flat, that model was a Lou Andrew design so I took that profile and redrawn an adapted wing to radio control with ailerons.
The idea is to use any Cox .049 engine, therefore it is suitable for many radio controlled model airplane enthusiasts who want to enjoy some fun stunts.
As well as being fun, I called it "Cox Fun" ... according to my time I'll be doing it.
Of course, I do not know its result in flight, but once tested, I am willing to share the drawing (plan) of this model aircraft that I already have scanned and available to send to anyone who wants to build it, they just send me the request. for this plane to my email address.
Clarification: no cost.
Well folks stay healthy I'm trying to do that ... let's keep asking God to protect us and we can move on.
Next, I will share with you the step by step.
For now a photo of what I have on the drawing board .... Greetings!
Cox engine .049 r/c & COX FUN MODEL 20200934
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Post  Levent Suberk on Thu Sep 17, 2020 11:57 am

Mauricio is engineer, modeller, draughtsman and one of the best friend! Very Happy Argentina Turkey United States United Kingdom Northern Ireland Spain Ireland Netherlands Germany Hungary Finland France Canada Colombia Australia
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Post  MauricioB on Thu Sep 17, 2020 4:15 pm

Thank you my friend for your words! ...
... or not, I just feel a lot of passion for this and every time I discover something, again I realize that something new is about to be discovered ...
A few hours ago I managed to let this engine regulate at 3200 rpm ... it is not to believe! ... how could you not fall in love with these jewels ?!
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Post  MauricioB on Thu Sep 17, 2020 11:34 pm

Well, I did new tests and the lowest I could regulate is 3270 rpm, you can almost see the propeller as it turns hahaha ... but the safe gear is around the 3400/3600 minimum, there the engine seems to like it more.
3600 rpm minimum is really very impressive, the propeller there barely pulls a negligible breath of wind. I was surprised by the ride reliability in these ranges.
3500/15000 is great. Very Happy Small Cox Logo Very Happy
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Post  getback Yesterday at 7:11 am

That is very impressive at 3600 rpms Shocked Does this engine have SPI or do you know ? It says the pre 96 did have with open ports . Is the prop a 6" it seems it should have a little better top end RPMs Huh... This Site Rocks!
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Post  MauricioB Yesterday at 8:55 am

Ohh Eric, you just had me inspect the cylinder inside and I was in for a big surprise. Shocked  Shocked
When I assembled this engine, I only saw the outer shape and immediately related it to the cylinder number 3 of the frame (Black Widow), it turns out that when you asked me the question, then I wanted to verify exactly to be able to answer you ... great was my surprise When seeing internally that this cylinder only has one transfer, only one !, that is, its external appearance confused me, now I have to see exactly what cylinder or cylinder number is exactly !! ... I will have to make an information correction in my video and also here then clarify, that it IS NOT a Black Widow cylinder .... I'm seeing what it is about ?? !!
Cox engine .049 r/c & COX FUN MODEL 20200935
Cox engine .049 r/c & COX FUN MODEL 20200936
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Cox engine .049 r/c & COX FUN MODEL Cox-0410

By error of external appreciation, I mistakenly confused this cylinder, believing that it was a cylinder number 3, however despite its external appearance to cylinder number 3, it only has one transfer.
Cox engine .049 r/c & COX FUN MODEL Cox-0411
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Post  MauricioB Yesterday at 9:22 am

So, looking at the line and figures of cylinders, I can't figure out which cylinder it is Huh... Huh... ....?
Can someone tell me exactly? ... thanks !!
https://es.qwe.wiki/wiki/Cox_model_engine
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Post  balogh Yesterday at 12:24 pm

The single bypass cylinders with SPI are #2
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Post  MauricioB Yesterday at 1:03 pm

This is a cylinder with an external appearance equal to number 3 on the sheet, but internally it only has one transfer and does not have SPI.
I don't see a cylinder like the one I have here on the spreadsheet ...
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