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DL100
Need some suggestion on this one. I was flying my yak 54 with a dl100 this morning and everything is fine until I start doing a knife edge, and rolls...while doing these the engine starts to burp and sounds like its going to quit. when I'm flying level or vertical, the motor runs great...Idle is good. I landed and took the engine temp. The right cylinder is 205 and the left is 195 so the engine is running nice and cool. Any suggestion on why the engine will miss or run fat in a knife edge and rolls.
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RE: DL100
...an air pressure change on the metering diaphragm in the carb (via the small hole in the flat plate on the carb). Block turbulent air from passing against this hole, or fit a nipple, and route a tube into the fuse, or balsa box where the air pressure is steady.
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RE: DL100
I think you may be right about the air flow and will solder a tube to the plate and route to the fuse. I think that will be the easy fix if that's what is causing it. Thanks for the comment.
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RE: DL100
My DL-50 was doing this inverted (lean) and knife edge (rich). I'd start with the vent plumbed to a more quiet place. I had to put a velocity stack on my DL-50 to get rid of it 100%. When I got my 55 I just went ahead and did both mod's. Funny thing is they both run the same: Awesome. No changing of mixture no matter what I'm doing in the air. You can roll it from upright to inverted and the engine sounds identical. Same with knife edge both ways. It's very nice when the engine runs so consistent.
PS: Jody at ValleyviewRC helped me sort this out BTW. He has the v-stacks there. |
RE: DL100
I will call Jody now....thanks for the information and I will let everyone know what works.
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RE: DL100
I'll give ya the diaphragm pressue condition but will argue the cool engine temps. By the time you made the descending approach and landing the head temps dropped 100 degrees or more. Likely more. So add 100 to 140 to those ground temps and review.
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RE: DL100
Well, I hope the engine temp isn't that high. Maybe 250 but not much more. From what I understand, at 300 degrees, the oil would really thicken up and not be any good, engine would seize or something like that....am I wrong?
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RE: DL100
Pistons won't seize at 300 but other detrimental things are starting to happen, especially with mineral based oil. Ground temps with an infra red temp gun after 30-60 seconds of low throttle landing maneuvers and taxiing back to the pilot are definitely not anything close to the high temp achieved during a typical 10 minute aerobatic/3-D flight.
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RE: DL100
jedijody, Thanks for the information and I have ordered two venom heat probes and will be able to get a more accurate reading of the engine temps. I am also changing to Red Line racing oil as you suggested. I have also removed the baffling on the bottom and hopefully that will cure the eratic engine run. Again, I really appreciate all the help from everyone.
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RE: DL100
I know I have asked this before but what temps should I be looking for? I know a lot of variances affect the temp. but what is a reasonable range while flying or what should the max. temp be?
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RE: DL100
MAX 300F
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RE: DL100
ORIGINAL: arobatx ...an air pressure change on the metering diaphragm in the carb (via the small hole in the flat plate on the carb). Block turbulent air from passing against this hole, or fit a nipple, and route a tube into the fuse, or balsa box where the air pressure is steady. i tried that balsa box idea.. I made a 1.5 in squared balsa box out of 1/4" and sealed nicely....I had 2 deadticks in a row, and both happened while i was doing flatspins at idle. I pulled the line out of the balsa box , and let it breathe inside the fuse and that problem went away |
RE: DL100
ORIGINAL: JoeAirPort My DL-50 was doing this inverted (lean) and knife edge (rich). I'd start with the vent plumbed to a more quiet place. I had to put a velocity stack on my DL-50 to get rid of it 100%. When I got my 55 I just went ahead and did both mod's. Funny thing is they both run the same: Awesome. No changing of mixture no matter what I'm doing in the air. You can roll it from upright to inverted and the engine sounds identical. Same with knife edge both ways. It's very nice when the engine runs so consistent. PS: Jody at ValleyviewRC helped me sort this out BTW. He has the v-stacks there. i cant find them on his website.... |
RE: DL100
You will need to call and ask
They are Pacific time <font size="5" face="Verdana, Arial, Helvetica, sans-serif" color="#ff0000"> 253-875-6890</font></p> <font size="6" face="Verdana, Arial, Helvetica, sans-serif" color="#003366">E-mail: [email protected]</font></p> |
RE: DL100
ORIGINAL: w8ye You will need to call and ask They are Pacific time <font size=''5'' face=''Verdana, Arial, Helvetica, sans-serif'' color=''#ff0000''> 253-875-6890</font></p> <font size=''6'' face=''Verdana, Arial, Helvetica, sans-serif'' color=''#003366''>E-mail: [email protected]</font></p> 253-569-4458 [email protected] |
RE: DL100
ORIGINAL: jedijody ORIGINAL: w8ye You will need to call and ask They are Pacific time <font size=''5'' face=''Verdana, Arial, Helvetica, sans-serif'' color=''#ff0000''> 253-875-6890</font></p> <font size=''6'' face=''Verdana, Arial, Helvetica, sans-serif'' color=''#003366''>E-mail: [email protected]</font></p> 253-569-4458 [email protected] |
RE: DL100
That's funny right there, I don't care who you are! :)
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RE: DL100
ORIGINAL: MetallicaJunkie ORIGINAL: arobatx ...an air pressure change on the metering diaphragm in the carb (via the small hole in the flat plate on the carb). Block turbulent air from passing against this hole, or fit a nipple, and route a tube into the fuse, or balsa box where the air pressure is steady. i tried that balsa box idea.. I made a 1.5 in squared balsa box out of 1/4'' and sealed nicely....I had 2 deadticks in a row, and both happened while i was doing flatspins at idle. I pulled the line out of the balsa box , and let it breathe inside the fuse and that problem went away ..."and sealed nicely" ????? The balsa needs to be able to breathe. On the installs I tried the balsa box solution, I put pinholes in three sides. I certainly wouldn't have sealed the box, but perhaps that isn't what you meant. The line into the fuse works most of the time. I'm interested in trying Pe's pitot tube approach just for kicks. |
RE: DL100
Max temps under 325f. Less than 195-210f and it's too cold. You can go a little higher than 325f but the risk of long term damage increases exponentially with the increase in temps. Our little engines are not consistent enough in quality to set blanket high temp limits above 325f.
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RE: DL100
I will post my max temps when I get the on board temp meters installed. I'm really interested to see what they will be.
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RE: DL100
Ok, I have the temp. problem solved on my DL100, but am still having a problem with the mixture setting. Engine runs a little rich on the ground and I am thinking it will lean out when it unloads in the air. My idle and high range are fine, but the mid-point is terrible. Blubber, sputtering and just not running good at mid or half stick. Any ideas/suggestions from dl experts will be appreciated.
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RE: DL100
hay guys whats going on can we use da headers for or dl and what can are good thanks
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RE: DL100
Not sure if this is the right place to ask that. You will get quicker answer if you pick another thread. I'm trying to keep this thread on engine tune up and mixture setting.
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RE: DL100
thanks man i can understand that i know what you mean i guess i will be back once i find out the place where i can get headers and can for the dle see ya soon boss
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RE: DL100
Not a problem,,,,wish I could help you on your question.
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