logo
Thread Tools
Old 08-19-2012, 08:39 AM
notruthless is offline
Find More Posts by notruthless
liv nvrtd
United States, NC, Oxford
Joined Dec 2007
182 Posts
Thank you for correcting me, pe! I used the wrong term here. Should have said tip speed rather than angular velocity.
Quote:
Originally Posted by notruthless View Post
...You are measuring revolutions not angular velocity.
Quote:
Originally Posted by pe reivers View Post
...
Angular velocity (degrees movement) is the same all over the prop. Real SPEED (velocity) is largest at the tips, because there the measuring RADIUS is largest.
...
notruthless is offline Find More Posts by notruthless
Reply With Quote Quick reply to this message
Sign up now
to remove ads between posts
Old 08-19-2012, 09:39 AM
js/rc is offline
Find More Posts by js/rc
Registered User
United States, OH, Conneaut
Joined Sep 2008
987 Posts
Quote:
Originally Posted by Outlaw308 View Post
OK who makes a Good tech? The one I have does not seem to read half of the time.
I believe this to be the best out there !!

http://www.fromeco.org/categories/Su...TNC_Tachometer
js/rc is offline Find More Posts by js/rc
Reply With Quote Quick reply to this message
Old 08-20-2012, 04:41 AM
pe reivers is offline
Find More Posts by pe reivers
Bad-ass Super Contributor!
pe reivers's Avatar
The netherlands
Joined Apr 2007
2,235 Posts
I use the JP micro tacho. There are many good ones out there.
Bad readings can be caused by sunshine reflections, like noted before. Try to read rpm in a shaded area or use some neutral background.
pe reivers is offline Find More Posts by pe reivers
Reply With Quote Quick reply to this message
Old 08-20-2012, 04:53 AM
cmala3 is offline
Find More Posts by cmala3
Super Contributor
Madison, AL
Joined Feb 2007
321 Posts
I use the rxexcel tach and plug into the tach lead on the DLE-111. It reads off the hall sensor. No light readings from the prop.
cmala3 is offline Find More Posts by cmala3
Reply With Quote Quick reply to this message
Old 08-20-2012, 07:43 AM
Outlaw308 is offline
Find More Posts by Outlaw308
Airplane Killer
Outlaw308's Avatar
United States, FL, DeLand
Joined Jun 2009
566 Posts
Quote:
Originally Posted by js/rc View Post
I believe this to be the best out there !!

http://www.fromeco.org/categories/Su...TNC_Tachometer

Thanks for the Info. I will check it out.
Outlaw308 is offline Find More Posts by Outlaw308
Reply With Quote Quick reply to this message
Old 08-20-2012, 11:29 AM
Theflyinglineman is offline
Find More Posts by Theflyinglineman
God is life
Theflyinglineman's Avatar
United States, FL, Sarasota
Joined Oct 2010
499 Posts
Hey guys was doing a little maintaince on my DLE 111 with about 4 gallon run through it. Plugs are not the same color left plug very black with some deposit on it right plug black but not as much as the other one. Is this normal

Thanks

Adam
Theflyinglineman is offline Find More Posts by Theflyinglineman
Reply With Quote Quick reply to this message
Old 08-20-2012, 11:52 AM
Theflyinglineman is offline
Find More Posts by Theflyinglineman
God is life
Theflyinglineman's Avatar
United States, FL, Sarasota
Joined Oct 2010
499 Posts
Just a little more info the top of the cylinder with the really black plug looks brand new. And there seems to be a lot more black oil in that exhaust stack compared to other cylinder

Thanks

Adam
Theflyinglineman is offline Find More Posts by Theflyinglineman
Reply With Quote Quick reply to this message
Old 08-21-2012, 12:56 AM
electricpaps is offline
Find More Posts by electricpaps
Registered User
France
Joined Jan 2007
24 Posts
Quote:
Originally Posted by Theflyinglineman View Post
Just a little more info the top of the cylinder with the really black plug looks brand new. And there seems to be a lot more black oil in that exhaust stack compared to other cylinder

Thanks

Adam


Try leaning out the carb settings.
How was the engine running ?
electricpaps is offline Find More Posts by electricpaps
Reply With Quote Quick reply to this message
Old 08-21-2012, 03:36 AM
pe reivers is offline
Find More Posts by pe reivers
Bad-ass Super Contributor!
pe reivers's Avatar
The netherlands
Joined Apr 2007
2,235 Posts
A slight difference between plugs is normal. Plugs should not be black though. That means the mixture is too rich and power will be low.
pe reivers is offline Find More Posts by pe reivers
Reply With Quote Quick reply to this message
Old 08-21-2012, 12:55 PM
TimBle is offline
Find More Posts by TimBle
Registered User
Joined Dec 2010
4,971 Posts
black plugs = carbon build up inside the combustion chamber. Like Pe says, that robs power but also makes the engine run hotter.
TimBle is offline Find More Posts by TimBle
Reply With Quote Quick reply to this message
Old 08-22-2012, 01:40 PM
pe reivers is offline
Find More Posts by pe reivers
Bad-ass Super Contributor!
pe reivers's Avatar
The netherlands
Joined Apr 2007
2,235 Posts
Hmmmm,
Not according to my observations. With the engine on the verge of 4-stroking with occasional misses my cylinder wall temperatures were down to 200F. Plugs were pitch black, and a lot of soot in the exhaust stack and muffler due to free carbon in the combustion gasses. Plugs would not last long before they would start missing beats due to fouling, but the engine metal was quite cool. Maybe the expelled gasses are hotter, but I cannot measure that.
pe reivers is offline Find More Posts by pe reivers
Reply With Quote Quick reply to this message
Old 08-23-2012, 02:48 PM
dephcon5 is offline
Find More Posts by dephcon5
refugee from NYC
dephcon5's Avatar
Joined Jul 2012
150 Posts
What ever happened to mfuess and his tech page?
dephcon5 is offline Find More Posts by dephcon5
Reply With Quote Quick reply to this message
Old 09-01-2012, 07:44 PM
Theflyinglineman is offline
Find More Posts by Theflyinglineman
God is life
Theflyinglineman's Avatar
United States, FL, Sarasota
Joined Oct 2010
499 Posts
Quote:
Originally Posted by mfuess View Post
Before you begin your tuneup, reset your needles to factory settings to start from gouund zero.

It's best to set the topend first. Start your engine, let it warm up. Transition to full throttle. Adjust the HIGHEND NEEDLE to peak RPM. Then, SLOWLY throttle back until the engine begins to FOUR STROKE. At the point, adjust the LOWEND needle until the FOUR STROKING stops. Pull the throttle down more until it FOUR STROKES again and repeat this until you reach full IDLE. NOW, transition up rapidly. IF it sags or bogs, open the LOWEND needle SLIGHTLY until the sagging is gone... YOU"RE DONE!

One big MISTAKE people make (when they tune up a gasser) is to peak the engine then back off the needle to richen it up slightly just like a glow fuel engine. DO NOT DO THAT! Once your carb is properly tuned to peak it will maintain the CORRECT air to fuel balance. Richening it up only causes the engine to run wet and inefficient. IF you are not sure if you have a good tune, look inside your muffler or pull your spark plug. It'll tell you real quick. If it's black & wet its time to re-do your tune.
I assume this is on an engine that is broken in . I am talking about the part to set high end to max rpm. Just trying to learn.
Theflyinglineman is offline Find More Posts by Theflyinglineman
Reply With Quote Quick reply to this message
Old 09-01-2012, 07:58 PM
JohnBer is offline
Find More Posts by JohnBer
Old Grouch
JohnBer's Avatar
USA, WA, Lynden
Joined Dec 2010
1,902 Posts
honestly , i did the tach tune thing.......aftrer about umteen tries.....TUNE IT TO WhERE IT SOUNDS THJE BEST!!!!!! forgit all the rest of the bs and make it reliable.
You will be much happier.
JohnBer is offline Find More Posts by JohnBer
Reply With Quote Quick reply to this message
Old 09-02-2012, 08:45 AM
Outlaw308 is offline
Find More Posts by Outlaw308
Airplane Killer
Outlaw308's Avatar
United States, FL, DeLand
Joined Jun 2009
566 Posts
What is a good safe temperatures for a DA-85 head 200 225 ????? and where would you take the reading at the plug area or just on the head any where?
Outlaw308 is offline Find More Posts by Outlaw308
Reply With Quote Quick reply to this message


Quick Reply
Message:


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
best prop for mvvs 2.15 gas engine. alexspano Gas Engines 4 08-13-2015 05:42 AM
Engine tuning help. xurifle06 Gas Engines 16 05-10-2015 06:08 AM
Gas engine test bench Kiwi General Discussion 4 01-28-2008 06:40 AM
re;Who can help me look for carbs for 200cc gas engine alfonso8182003 Gas Engines 8 05-19-2007 07:19 PM
Gas Engine Break In? Chris Gas Engines 9 06-05-2006 07:12 PM