Cox Engines Forum
You are not logged in! Please login or register! Guests are limited to posting in the "General Questions (Guest Posting Allowed)" section only. Becoming a member is fast, easy and FREE!


Greetings from Italy Babe_b10
Log in

I forgot my password

Search
 
 

Display results as :
 


Rechercher Advanced Search

Cox Engine of The Month
November-2019
jmcalata's

"Pee Wee .020 throttled combinated"



PAST WINNERS
CEF Traveling Engine

Win This Engine!
The Traveling Prop
Gallery


Greetings from Italy Empty
World of Aviation

Greetings from Italy

Page 1 of 2 1, 2  Next

Go down

Happy Greetings from Italy

Post  franzkleber on Fri Mar 01, 2019 4:15 pm

Hi everyone from Italy
I've been quietly following this forum for quite some time and now I've decided to write my first post.
I am passionate about engines since I was a kid.and even now that I am 54 years old I continue to be fascinated.
In my own opinion Cox engines are simply fantastic from every point of view.
I have a little hobby equipment (a myford lathe and a little mill)and I delight in the restoration of old engines found in the flea markets but i also tried to build some prototipes from machining .
Congratulations again for this nice forum.

Franz Kleber
franzkleber
franzkleber
Moderate Poster
Moderate Poster

Posts : 17
Join date : 2016-01-29
Age : 55

Back to top Go down

Happy Re: Greetings from Italy

Post  rsv1cox on Fri Mar 01, 2019 5:05 pm

Sounds like you will fit right in here Franz.

Welcome aboard.

Bob
rsv1cox
rsv1cox
Top Poster
Top Poster

Posts : 4665
Join date : 2014-08-18
Location : West Virginia

Back to top Go down

Happy Re: Greetings from Italy

Post  Kim on Fri Mar 01, 2019 5:24 pm

WELCOME TO CEF!!!!!

Glad you're here Franz !!!!!
Kim
Kim
Top Poster
Top Poster

2019 Supporter

Posts : 6789
Join date : 2011-09-06
Location : South East Missouri

Back to top Go down

Happy Re: Greetings from Italy

Post  Cribbs74 on Fri Mar 01, 2019 5:49 pm

Welcome Franz,

Your name sounds German not Italian!

Let us know what you are making with that lathe.

Ron
Cribbs74
Cribbs74
Moderator

2019 Supporter

Trusted Seller
Posts : 10560
Join date : 2011-10-24
Age : 45
Location : Tuttle, OK

Back to top Go down

Happy Re: Greetings from Italy

Post  Marleysky on Fri Mar 01, 2019 9:56 pm

WELCOME TO THE FORUM Glad you decided to join in the fun!
Marleysky
Marleysky
Diamond Member
Diamond Member

2019 Supporter

Posts : 2408
Join date : 2014-09-28
Age : 67
Location : Grand Rapids, MI

Back to top Go down

Happy Re: Greetings from Italy

Post  getback on Sat Mar 02, 2019 7:13 am

Welcome to The CEF Forum Franz !!! Happy to hear from you , you sound like a engine guy . Babe Bee .049
getback
getback
Top Poster
Top Poster

2019 Supporter

Posts : 6339
Join date : 2013-01-18
Age : 62
Location : julian

Back to top Go down

Happy Re: Greetings from Italy

Post  franzkleber on Sat Mar 02, 2019 1:34 pm

Thanks to all the warm welcome!
Yes the nick name seems german but its only my italian name translated into German
My office colleagues began to call me in that way because of the fact that I project automotive components mainly for the German market .
I try to show some photo of my last work ….
Greetings from Italy Img_2011
Greetings from Italy Img_2010
franzkleber
franzkleber
Moderate Poster
Moderate Poster

Posts : 17
Join date : 2016-01-29
Age : 55

Back to top Go down

Happy Re: Greetings from Italy

Post  Jason_WI on Sat Mar 02, 2019 1:54 pm

Nice rear disc valve engine. Did you make it?

Welcome to the forum.
Jason_WI
Jason_WI
Diamond Member
Diamond Member

2019 Supporter

Posts : 2731
Join date : 2011-10-09
Age : 44
Location : Neenah, WI

Back to top Go down

Happy Re: Greetings from Italy

Post  franzkleber on Sat Mar 02, 2019 2:08 pm

Yes i did it all by myself , its a 2.5 cc with zimmermann rear valve.
I had a "half idea" to take part in the Italian GIP 46 control line speed trophy, where rolling bearings are not allowed if using self-built engines.
So I tried the zimmermann valve as engine admission because I was hoping it would increase performance.
But unfortunatly the performances remained low anyway , with a graupner 6.5X6.5 and 10% nitro i can read about 15500 rpm ….i must definitely improve something ...
franzkleber
franzkleber
Moderate Poster
Moderate Poster

Posts : 17
Join date : 2016-01-29
Age : 55

Back to top Go down

Happy Re: Greetings from Italy

Post  smooth_bill on Sat Mar 02, 2019 7:02 pm

franzkleber wrote:Yes i did it all by myself , its a 2.5 cc with zimmermann rear valve.

Hi Franz,

Beautiful workmanship, and a very nice looking engine!

Have you flown it yet?

I know nothing about speed engines, but there are lots of speed fans on the forums.

Best of luck.

Bill

smooth_bill
smooth_bill
Gold Member
Gold Member

2019 Supporter

Posts : 118
Join date : 2012-02-19
Age : 82
Location : Beaverton, OR

Back to top Go down

Happy Re: Greetings from Italy

Post  Admin on Sat Mar 02, 2019 7:47 pm

Here's your long awaited Welcome to The Forum!

That is some really fine craftsmanship there! Beautiful engine!

_________________
-Jacob


Admin
Admin
Administrator

Posts : 5061
Join date : 2010-07-27
Location : Roseville, Minnesota

http://sites.google.com/site/coxenginecollection/

Back to top Go down

Happy Re: Greetings from Italy

Post  ticomareado on Sat Mar 02, 2019 8:09 pm

Looks like some Ron Valentine level work to me.
ticomareado
ticomareado
Platinum Member
Platinum Member

Posts : 869
Join date : 2013-10-03
Location : NC

Back to top Go down

Happy Re: Greetings from Italy

Post  MauricioB on Sat Mar 02, 2019 11:04 pm

Welcome to the forum ... I'm glad you join, there are wonderful people here.
A pleasure to know about your work ... thanks for sharing!
MauricioB
MauricioB
Diamond Member
Diamond Member

Posts : 2192
Join date : 2016-02-16
Age : 48

Back to top Go down

Happy Re: Greetings from Italy

Post  balogh on Sun Mar 03, 2019 1:08 am

Welcome Franz..I am particularly happy that a new member strengthens the growing "European section" of CEF. Italians and Hungarians have always been famous for our CL speed engines like Rossi, Moki etc.

And I could not agree more that COX engines are fantastic. Small Cox Logo

Also wanted to ask if you have tached your TeeDee09 with the 3D printed air scoop submitted to the COX Engine of the Month competition, and what your experience was? I would think that because of the ram pressure inside the scoop the static around the spraybar is higher than atmospheric so the atmospheric tank must be pressurized for a steady run?
balogh
balogh
Diamond Member
Diamond Member

Posts : 2482
Join date : 2011-11-06
Age : 61
Location : Budapest Hungary

Back to top Go down

Happy Re: Greetings from Italy

Post  franzkleber on Sun Mar 03, 2019 4:54 am

Many thanks to all folks … unfortunatly i have to admit that i am very .... very far away from Valentine works !
I started "playing" with model engine only about 3 years ago …. and this "virus" has infected me deeply Very Happy
I must say that I was lucky to meet an Italian guy who has been doing this kind of works for a long time, we live far away, he lives in Emilia Romagna near Modena but he became my mentor !
Last time we mets at a SAM 2001 Flying meeting its engine on the test bench exactly in the same conditions as mine exceeded 20,000 RPM!!
I was desperate and very disappointed Shocked moral of the story i have to work a lot more!
franzkleber
franzkleber
Moderate Poster
Moderate Poster

Posts : 17
Join date : 2016-01-29
Age : 55

Back to top Go down

Happy Re: Greetings from Italy

Post  franzkleber on Sun Mar 03, 2019 5:08 am

Also wanted to ask if you have tached your TeeDee09 with the 3D printed air scoop submitted to the COX Engine of the Month competition,
[/quote]


Hello balogh pleased to answer ,yes i tached it on the test bench only , with an APC 7x4 and a fuel 67 alcohol-23 oil-10 nitro i have seen a steady 15.600 RPM.
I find the suction very good , its start quickly and easily , and i want to try to increase slightly the venturi.
Now is equivalent to a hole diameter 2.9 mm (that is 6.6 mm2) i must check the original diameter on one new old stock engine ….. i think its a little bit bigger ...
franzkleber
franzkleber
Moderate Poster
Moderate Poster

Posts : 17
Join date : 2016-01-29
Age : 55

Back to top Go down

Happy Re: Greetings from Italy

Post  franzkleber on Sun Mar 03, 2019 5:12 am

franzkleber wrote:Also wanted to ask if you have tached your TeeDee09 with the 3D printed air scoop submitted to the COX Engine of the Month competition,


Hello balogh pleased to answer ,yes i tached it on the test bench only , with an APC 7x4 and a fuel  67 alcohol-23 oil-10 nitro i have seen a steady 15.600 RPM.
[/quote]

I forgot to mention that the glow head is COX original but as it burned ( Sad ) I reworked it to use a standard glow plug OS P4 turbo
franzkleber
franzkleber
Moderate Poster
Moderate Poster

Posts : 17
Join date : 2016-01-29
Age : 55

Back to top Go down

Happy Re: Greetings from Italy

Post  balogh on Sun Mar 03, 2019 5:36 am

Thanks Franz. As far as my calliper goes into the 09 venturi I can measure 3.5 mm diameter.
Did you pressurize the tank when using the air scoop?
Yes the turbo plug is the right solution. Normal plugs in such small engines like an 09 are just performance robbers because of the gas volume captured between the normal plug and head threads that spoils compression ratio.
balogh
balogh
Diamond Member
Diamond Member

Posts : 2482
Join date : 2011-11-06
Age : 61
Location : Budapest Hungary

Back to top Go down

Happy Re: Greetings from Italy

Post  franzkleber on Sun Mar 03, 2019 6:00 am

balogh wrote:Thanks Franz. As far as my calliper goes into the 09 venturi I can measure 3.5 mm diameter.
Did you pressurize the tank when using the air scoop?
Yes the turbo plug is the right solution. Normal plugs in such small engines like an 09 are just performance robbers because of the gas volume captured between the normal plug and head threads that spoils compression ratio.


Yes i am exactly of the same opinion , turbo plugs cost a little more but they are much better option.

The 3.5 mm sound right also to me , i will enlarge the venturi to 3.4-3.5 mm.
No pressurized tank because I'm not able to do and i like keep the think simple i am mainly passionate about engines and must confess that I did fly a control line airplane only once in my life with my 2.5 cc zimmermann , and after only 8 turns i broke the model in a bad Landing Rolling Eyes
I have to improve and learn a lot also in these fields ... Crying or Very sad
franzkleber
franzkleber
Moderate Poster
Moderate Poster

Posts : 17
Join date : 2016-01-29
Age : 55

Back to top Go down

Happy Re: Greetings from Italy

Post  balogh on Sun Mar 03, 2019 6:25 am

Franz in this topic below I described my experience with a similar ( but a bit stone-age) solution and others commented and added useful advice:

https://www.coxengineforum.com/t7472-compressor-charged-td049?highlight=Turbo+charged
balogh
balogh
Diamond Member
Diamond Member

Posts : 2482
Join date : 2011-11-06
Age : 61
Location : Budapest Hungary

Back to top Go down

Happy Re: Greetings from Italy

Post  getback on Sun Mar 03, 2019 7:09 am

Very Nice looking engine Franz ..  Greetings from Italy Img_2012
I am not an engine builder but from the look of the parts they are very beefy as in the rod /pis assy thick crank web // all these will contribute to slower runs and the 10 % nitro have you tried or can you get 35% or higher nitro ( even if the event want allow it, if just to try ) The back plate of the fit to CC were the O ring is needs work as not to protrude out ... Just saying
getback
getback
Top Poster
Top Poster

2019 Supporter

Posts : 6339
Join date : 2013-01-18
Age : 62
Location : julian

Back to top Go down

Happy Re: Greetings from Italy

Post  KariFS on Sun Mar 03, 2019 7:52 am

Welcome Franz!

Very impressive work, is that your own design?
KariFS
KariFS
Diamond Member
Diamond Member

Posts : 1569
Join date : 2014-10-10
Age : 48

Back to top Go down

Happy Re: Greetings from Italy

Post  franzkleber on Sun Mar 03, 2019 8:38 am

balogh wrote:Franz in this topic below I described my experience with a similar ( but a bit stone-age) solution and others commented and added useful advice:

https://www.coxengineforum.com/t7472-compressor-charged-td049?highlight=Turbo+charged

Wow you had the idea first and applied to a 0.051 TD!
One of the downside with my solution is the fact that it has become more complicated to cover the venturi to obtain more suction for an easy start … one finger is not enought and thepropelleris too close!
Still talking about the performance with 3.5 mm venturi and same fuel probably it can hit the target of 16.500 rpm …. i must try Very Happy
franzkleber
franzkleber
Moderate Poster
Moderate Poster

Posts : 17
Join date : 2016-01-29
Age : 55

Back to top Go down

Happy Re: Greetings from Italy

Post  franzkleber on Sun Mar 03, 2019 8:47 am

KariFS wrote:Welcome Franz!

Very impressive work, is that your own design?


Hello KariFS , yes its all my own design and this explain also the low performance , it need some modifications to release all its potential but i am a little hesitant to make heavy changes.
Now it starts easily and makes a lot of noise Laughing and I like it enough .... i learn a lot and I will try to do better the next one ... Laughing
franzkleber
franzkleber
Moderate Poster
Moderate Poster

Posts : 17
Join date : 2016-01-29
Age : 55

Back to top Go down

Happy Re: Greetings from Italy

Post  balogh on Sun Mar 03, 2019 8:52 am

Franz put the bar higher! My 09 with stock carb swings a 7x4 APC prop at around 16k. I think this is basically what you may also read in the sceptre flight reports: http://www.sceptreflight.com/Model%20Engine%20Tests/Cox%20Tee%20Dee%2009.html
Greetings from Italy 15516210

I think if the scoop really increases the airflow and the tank is pressurized a 18k speed with a 7x4 prop is doable!
balogh
balogh
Diamond Member
Diamond Member

Posts : 2482
Join date : 2011-11-06
Age : 61
Location : Budapest Hungary

Back to top Go down

Happy Re: Greetings from Italy

Post  Sponsored content


Sponsored content


Back to top Go down

Page 1 of 2 1, 2  Next

Back to top


 
Permissions in this forum:
You cannot reply to topics in this forum