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[Demetre]

Sorry about the Engl. but can't apply the convercion.
I assume your temp. readings are in Fahrenheit,and you are readings are taken  from the muffler pipes, (EGT)= Exhaust Gas Temperature ,and not from the Heads (CHT)=Cylinder Head Temp.
On Aluminum Engines CHT above 500 F* or ECT above 1300 F* is Border Line. When you start  passing those limits, the troubles are inevitable...Aluminum pistons melt  aprox. at temp. 1500 F*>
Happy New Year .   Jim

[w1ndsurfer]

Sorry about the Engl. but can't apply the convercion.
I assume your temp. readings are in Fahrenheit,and you are readings are taken  from the muffler pipes, (EGT)= Exhaust Gas Temperature ,and not from the Heads (CHT)=Cylinder Head Temp.
On Aluminum Engines CHT above 500 F* or ECT above 1300 F* is Border Line. When you start  passing those limits, the troubles are inevitable...Aluminum pistons melt  aprox. at temp. 1500 F*>
Happy New Year .   Jim

Äçì�ôñç,
áí â�ëåéò ôï âéíôåï óå full screen èá äåéò üôé ôï üñãáíï ä�íåé 1 äå�áäé�ü øçö�ï, �ñá ïé èåñìï�ñáó�åò å�íáé ì�÷ñé 120* �åëó�ïõ = áðïëýôùò öõóéïëïãé��ò ãéá öïõë ã��æé

¸�ôïñá,
áðü üôé öá�íåôáé ôï ä�ìáóåò ôï èçñ�ï!
Ôþñá ÷ñåé�æåóáé �áé �íá üñãáíï íá ìåôñ�åé ôï manifold pressure ôçò åéóáãùã�ò!

[hpergm]

Sorry about the Engl. but can't apply the convercion.
I assume your temp. readings are in Fahrenheit,and you are readings are taken  from the muffler pipes, (EGT)= Exhaust Gas Temperature ,and not from the Heads (CHT)=Cylinder Head Temp.
On Aluminum Engines CHT above 500 F* or ECT above 1300 F* is Border Line. When you start  passing those limits, the troubles are inevitable...Aluminum pistons melt  aprox. at temp. 1500 F*>
Happy New Year .   Jim

Happy New Year Jim.

The temp. readings are in Centigrade (last digit is a decimal) and taken directly on the cylinder top between the fins, right next to the plug (i.e. CHT). That is basically the easiest place to fix the probe.

I have contemplated placing the temperature gauge on the exhaust nut of each cylinder for an EGT reading, but still thinking how to fasten it..

Lastly, I never let the temps to go above 390F or ~200C. When such instances did uccur (I was just getting to know how to tune the carb), I immediatelly throttled down to readjust the settings. That's why the multiple temp reading is indispensible with an R3...

Hector.

[hpergm]

Äçì�ôñç,
áí â�ëåéò ôï âéíôåï óå full screen èá äåéò üôé ôï üñãáíï ä�íåé 1 äå�áäé�ü øçö�ï, �ñá ïé èåñìï�ñáó�åò å�íáé ì�÷ñé 120* �åëó�ïõ = áðïëýôùò öõóéïëïãé��ò ãéá öïõë ã��æé

¸�ôïñá,
áðü üôé öá�íåôáé ôï ä�ìáóåò ôï èçñ�ï!
Ôþñá ÷ñåé�æåóáé �áé �íá üñãáíï íá ìåôñ�åé ôï manifold pressure ôçò åéóáãùã�ò!

ΒΌΓ·Γ©, ôþñá Γ³Γ΄Γ�Γ­ΓΉ Γ¬Γ�ôñçóç ïîõãüíïõ óôçí åîΓ�ôìéóç Γ�áé Γ�Γ­Γ΅ micro servo óôç âåëüíá Γ�ôóé þóôå Γ­Γ΅ áõôïññõèìΓ�æåôáé óôïí Γ΅Γ�Γ±Γ΅...  

Óçì. Óôï full ã��æé ïé èåñìï�ñáó�åò �ôáí ìåôáîý 170 �áé 185C. �áé áõôü óå ì�á ì�ñá üðïõ öýóáãå ìå 7C (øüöïò óôï Åëëçíé�ü, ìáò ð�óáíå ïé ìýôåò). ¢ñá óå ìéá áíïéîé�ôé�ç ì�ñá ôùí 25C, ðåñéì�íù íá áí�âïõí ð�íù áðü 200C. Ôï �áëü å�íáé üôé ïé èåñìï�ñáó�åò ðá�ñíïõí áñ�åô� äåõôåñüëåðôá óôï WOT íá áí�âïõí áðü 120 óå 180 (ìéë�ìå ãéá ð�íù áðü 20"), ðñ�ãìá ôï ïðï�ï äåí å�íáé áíáìåíüìåíï óå ìéá scale ðô�óç üðïõ ç ìç÷áí� äåí å�íáé ïñéá�� ãéá ôï airframe.

Talk about "flying the engine"... Γ΅Γ�ñéâþò üðùò Γ�áé óôá full scale! (Ôá Γ�3/Γ�4 Γ�ðáó÷áí áðü cooling  )

[Demetre]

You'r on the right track then.
I will  also remind you that EGT reading is going to show you  instantly  that there is some kind of problem,when CHT i'll take a few more minutes for the reading to rise,and perhaps by that time it is too late.  Good Flights !!!!

[hpergm]

Äé�âáóìá ôùí ìðïõæ� ìåô� ôç ñýèìéóç...
Çì�ñá ìå ôç íý÷ôá! �ðïõæ� îçñ� (ü÷é ôçãáíéóì�íá), á�ñïä��ôåò áíïé�ôü �áö� , ìçä�í deposits.

[ArgyrisGiannetakis]

Ö�ëå ¸�ôïñá óïõðåñ!�é äéáöïñåò ðïõ âëåðåéò óôéò èåñìï�ñáó�åò åéíáé �áé áðï ôçí äéáäé�áóéá ôïõ óôñùó�ìáôïò .�ëëåò áíï÷�ò ï ��èå �ýëéíäñïò!!�é saito �áé åéäé�á âåíæéíá è�ëïõí ôåñáóôéá õðïìïí� óå óôñþóéìï!ÔÅÑ�ÓÔÉ�!Ôá ì�ôáëá ôïõò åéíáé �ïñõöá�á �áé èåëïõí äéðë�óéï ÷ñïíï óôñùó�ìáôïò áðï ïðïéä�ðïôå �ëëïõ �áôáó�åõáóô�!�ïôåñ èá äåéò ìåôá ôéò 20 ùñåò ëåéôïõñãå�áò.Äéðëáó�áóå �áôá ôçí ãíþìç ìïõ ðáíôá ôïí ÷ñüíï óôñùó�ìáôïò ��ôù, 10 ëéôñá +, �áé ìåôá óôïí áåñá óå ðôçóç ìå ôá öïñô�á, åð�óçò ðïëý õðïìïí� ìå áñ�åôåò ðôçóåéò 20+÷áëáñá �áé ìå �áë�ò óõíè��åò ( ÷åéìùíá )�áé õðïëüãéóå ôéò ðñùôåò �áé ÷ùñ�ò cowl.Õðïìïí� × 2 × 3!
�ðï ðñïð�ëá å�óáé óïýðåñ 22÷10!�á�ñéá áðï âáñé� íïõìåñá �áé ôñ�öõëëåò.èáíáôïò!

[hpergm]

�ñãýñç, ç ìç÷áí� �÷åé �äç ôñ�îåé 8 ë�ôñá �áé èá ôñ�îåé �ëëá 2-4 óôï stand íá å�ìáóôå ó�ãïõñïé üôé èá �÷åé óôñþóåé �áé üôé �÷ïõìå ðåôý÷åé �áë� ñýèìéóç,

¸÷åéò ä��éï ãéá ôçí õðïìïí�: �áé ôç äé�ýëéíäñç ôïõ Piper á�üìá "�óôñùôç" ôç èåùñþ (ðïõ ôï ö�ñíù óôá scale ôïõ ��ñáéöí�ïõ áðü... ôï 2010!)

(Γ�Γ�ëëïí äå ΓΆΓ�æù þñåò üðùò ðáëéΓ�...  )

[MOGOLOS]

Ãéá íá �áôáë�âù 170-185 âáèìï� �åëó�ïõ åéíáé �� ãéá �íá ìïôåñ?

[hpergm]

Mog, ãéá 4-Γ·Γ±Γ―Γ­Γ§ âåíæΓ�Γ­Γ§ "converted" áðü glow (äçë. ìå ìéΓ�Γ±Γ�Γ² ΓΈΓ½Γ�ôñåò); Γ�Γ―Γ¬Γ�æïõìå (read: åëðΓ�æïõìå   ) ðùò Γ­Γ΅Γ�.

�çí îå÷í�ìå üôé ç 4-÷ñïíç gas äïõëåýåé óå ìåãáëýôåñåò óõìðé�óåéò áðü üôé ç ä�÷ñïíåò gas, åíþ ç âåíæ�íç �÷åé ìåãáëýôåñç èåñìï�ñáó�á �áýóçò áðü ôï glow.

�ðüôå, ç èåñìï�ñáó�á ìéáò ô�ôïéáò ìç÷áí�ò èá å�íáé ëïãé�� áñ�åô� ðéï áíåâáóì�íç áðü å�ôå 2-÷ñïíç gas (÷áìçëüôåñç óõìð�åóç + ìåãáëýôåñá fins) å�ôå áðü 2-÷ñïíç/4-÷ñïíç glow (÷áìçëüôåñç èåñìï�ñáó�á �áýóçò + áðïññüöçóç èåñìï�ñáó�áò áðü ôçí áéèáíüëç).

�áñáè�ôù �áé �íá test ìïíï�ýëéíäñçò gas Saito - ïé èåñìï�ñáó�åò CHT å�íáé áñ�åô� ðéï áíåâáóì�íåò áðü ïðïéáä�ðïôå glow � 2-÷ñïíç gas....

http://www.flyrc.com/saito-fg-36-engine/

(Γ�áé ãéá Γ­Γ΅ ôï ðïýìå ðéï ìðáΓ�áëΓ�óôéΓ�Γ΅: áöïý äåí ôçí Γ°Γ�ñáìå óôï Γ·Γ�Γ±Γ© Γ¬Γ�Γ·Γ±Γ© óôéãìΓ�Γ²...   )

Γ…Γ°Γ�óçò, Γ·Γ¨Γ�Γ² äïΓ�éìΓ�óáìå Γ­Γ΅ ìåôñΓ�óïõìå èåñìïΓ�ñáóΓ�åò EGT (ΓΌΓ·Γ© Γ΅Γ�ñéâþò éäáíéΓ�Γ�, áëëΓ� üðùò ìðïñïýóáìå  ). Äåí Γ¥Γ�äáìå ìåãΓ�ëåò äéáöïñΓ�Γ² ìå ôéò CHT, Γ¥Γ�ôüò ôïõ üôé ìðïñΓ�óáìå Γ�áé óõñìáôáóöáëΓ�óáìå ôá èåñìïóôïé÷åΓ�Γ΅ óöéΓ�Γ΄Γ� Γ�áé áõôΓ� áö'åíüò äåí Γ�öåõãáí, áö'åôáΓ�Γ±Γ―Γµ äåí Γ¥Γ�÷áìå áìöéâïëΓ�åò ãéá ôçí Γ΅Γ�Γ±Γ�âåéá ôùí ìåôñΓ�óåùí ëüãù "Γ�Γ΅Γ�Γ�Γ²" åðáöΓ�Γ².

Â�íôåï:

[MOGOLOS]

� 84 �ãñáøå 90 óôï �äáöïò �áé 65 óïí á�ñá
¸÷ù ôçí åíôýðùóç üôé ôï ìïô�ñ ðáåé íá ã�íåé ìåëéôæ�íá
Åý÷ïìáé íá ��íù ë�èïò

[ArgyrisGiannetakis]

Óõìöùíþ ìå ôïí Ãéáííç ïôé Γ¥Γ�íáé ðïëý 170-185  CHT áëëΓ� Γ¥Γ�íáé  Γ΄Γ¥Γ±Γ¬Γ΅ Γ£Γ�Γ�æé Γ�áé ìåôá áðï 20 äåõôåñüëåðôá.Γ�áëé ΓΆΓ�âáéá Γ¥Γ�íáé áñΓ�åôΓ�!ÅéäéΓ�Γ� ìå ôïóï Γ�Γ±Γ½Γ― Γ�áéñü!Ôá ëïãéΓ�Γ� íïõìåñá Γ¥Γ�íáé âáñéΓ� ìå÷ñé 140!Γ�ðï 85 åùò 140.
�éóô�õù ïðùò å�ðá �áé ðáñáð�íù ëüãù áóôñùó�áò á�üìá �áé ãéá ðïëý ðïëý á�üìá, ôá íïýìåñá áõô� èá õð�ñ÷ïõí óôï ôåñìá ã��æé.�áëü å�íáé �áôá ôçí ãíþìç ìïõ ð�íôá íá áðïö�õãåéò ôá ðïëë� óôáèåñ� ã��æéá øçë�,áñ�åô� ìðïõ�ùì�íï ôá �ëáóé�� äçëáä�.�áé ìéá äï�éì� åáí è�ò ÷ùñ�ò ôçí KELEO ð�íù íá äå�ò ôéò äéáöïñ�ò ìå �áé ÷ùñ�ò!�í��áèåí ìå ôéò åîáôì�óåéò �÷ù áìöéâïë�åò áñ�åô�ò �áé áò å�íáé åðþíçìåò.�÷é ïôé �÷åé è�ìá áëë� éóùò ìåô� ïôáí óôñþóåé áñ�åô� ,åáí äåéò äéáöïñ�ò!

[hpergm]

Åõ÷áñéóôþ ãéá ôï feedback Ãé�ííç �áé �ñãýñç.

Γ�ðïñåΓ� Γ­Γ΅ Γ¥Γ�íáé Γ΅Γ�üìá Γ�óôñùôç, üðùò Γ«Γ�Γ² Γ�ñãýñç. Γ�áé Γ�÷åéò Γ¤Γ�Γ�éï ãéá ôçí åîΓ�ôìéóç, ôï Γ³Γ�Γ�öôçΓ�Γ΅ Γ�áé åãþ Γ¬Γ�ðùò Γ­Γ΅ Γ°Γ�ΓΉ óôéò ìáìΓ�óéåò ãéá Γ­Γ΅ äþ äéáöïñΓ�. Γ�ëëΓ�... Γ¤Γ� ìïõ Γ°Γ�åé. Γ—Γ�íåôáé Γ― óåîïõáëéΓ�ΓΌΓ² Γ�Γ·Γ―Γ²..  

Γ“Γ�ìåñá ôçí ôñΓ�îáìå Γ�áé óôïí Γ…Γ±Γ¬Γ�. Äåí Γ°Γ�ãå Γ�ó÷çìá - ìüíï Γ�Γ�ôé "Γ�Γ―ΓΈΓ�ìáôá" Γ�Γ�áíå óôá ðáñáôåôáìΓ�Γ­Γ΅ øçëΓ� - ìðïñåΓ� áðü áíΓ�öëåîç, ìðïñåΓ� áðü ñýèìéóç,  Γ¬Γ°Γ―Γ±Γ¥Γ� áðü  Γ΅Γ³Γ΄Γ±ΓΉΓ³Γ©Γ�. Γ…Γ�äïìåí. Γ�Γ΅ ðñΓ�ðåé Γ­Γ΅ äïýìå ôç ìç÷áíΓ� óôïí Γ΅Γ�Γ±Γ΅ ôåëéΓ�Γ� Mog. Äõóôõ÷þò äåí Γ�ñèå ôï Γ�ëëï FW190 ìå ôçí FG-84 Γ­Γ΅ ôï ÷áæΓ�øïõìå - ôçí Γ�ëëç öïñΓ� Γ�Γ³ΓΉΓ²..  

Åõ÷áñéóôïýìå ôçí ðáñΓ�Γ΅ ôïõ Γ…Γ±Γ¬Γ� ãéá ôç öéëïîåíΓ�Γ΅, ΓΆΓ―Γ�èåéá ãéá ôç ñýèìéóç Γ�áé ôçí ΓΉΓ±Γ΅Γ�Γ΅ Γ�Γ―ΓµΓΆΓ�íôá!   Õðïó÷üìáóôå åðéóôñïöΓ� ìå áåñïðëΓ�Γ­Γ― ôçí åðüìåíç öïñΓ� (Γ­Γ΅ äïΓ�éìΓ�óïõìå Γ�áé ôï äéΓ�äñïìï).

[Demetre]

Hi again. Your temp. readings are within the envelope.
The EGT readings can only be taken from the exhaust gas (aprox.2-4cm from the exhaust port,where ever possible)  THROUHTH the exhaust pipe.
Anotherwords,must drill a small holle on the pipe,insert the temp.prob , and connect to your temp. meter , but all this work  is not necessary.
It is only a model airplane, and you'r not in it.(It is only money)
The system you have installed , is ok to take readings and notice the rapid temp. change from idle to full throtle.
If you notice a very quik and large difference then throtle back, and go rich on the carb. Play back and forth till you get it right.
When you install on plane, it is important to remember  "cooling valume" (amount of air moving through the engine fins) and not weather temperature.
Go to Rotax engines- operators manual- par.10 operating parameters,and you can see the temp. relations on engines.
Not that all engines are the same ,but you'l get the idea.
Also know this: even a small dent,or imperfection, on the intake or exhaust stacks it will make a different on the engine's /cilinders performance.
Now as far as  running the engine on the ground part,i'll say after going through 2-3 tanks of gas(20 oz),and ajasting the engine,you wiil do a better job by just flying on  a fat setting and various throtle possitions in the air.(you don't brake in your car by running it outside on the parking lot)
 Have a good day and even better wondefull flights .  Jim

[hpergm]

Hi Jim - thanks for all your comments!

You are right in every account:
- EGT must be in contact with the exhaust GAS and not a metal part of the exhaust manifold. This is why I say "sort of EGT". In reality, the readings are (slightly shifted) CHT..
- I have done exactly as you said: look at the temps and in case of large delta peaks, go to idle and re-adlust back to safety. That was the whole point of the thermocouple set-up in the first place (avoiding to inadvertedly "cook" one cylinder).
- Thanks for the Rotax resource - I will have a look. I have read a lot about Vedeneyev engines as well - as a primer to radials. Very useful.
- Right again for the ground testing. This is anyway coming to a close after about 10 tanks or 5lt. Only problem is I am afraid to commit a warbird as a test bed. A little hickup means a lot of re-work (e.g. torn-off retracts, etc). I may put the motor on my 50CC Yak first...

BR,
Hector.