RE: Dle 30 dies in takeoff
[quote] Hello, I have solved the problem by letting the carb draw air from inside the fuselage! The photos attached show how simply I did this by using dense foam rubber around the firewall hole. To answer your questions I use a 2 line from the tank via a Dubro quick fill valve, the carb has been opened again (3rd time) but found no dirt. I suppose that air incoming from the two top openings of the Sbach 342, not having a clean way out (see photos) towards the bottom opening, blocked by the muffler and the weights underneath the engine box, was rammed into the ventury therefore leaning the fuel mixture enough to stop the engine. The new set-up also yielded a smoother, lower, more stable idle. [quote][/quote] Hi Dino, I am just curious if you have done any extended inverted flight? It is possible that there is a float setting problem. If so your engine will quit in a prolonged inverted flight. Dave
Posted on: 3/28/2012 7:39 PM by Author "DaveE61" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11019330

RE: Need more power!
[quote]ORIGINAL: CK1 I would check the timing . I have 4 DLE 30 engines and none of them were set correctly out of the box , a few were off by 15 degrees . I have made a habit of checking and setting the timing on any engine I buy before I run it . All the needle turning in the world won't make one run right if the timing isn't correct . Set it at 28 to 30 degree BTDC and re-adjust the carb . [/quote] I fly a DLE 30 at 5,000'. Do you think the 28 to 30 degree BTDC timing is correct for this altitude? Thanks, Dave
Posted on: 3/26/2012 8:01 PM by Author "DaveE61" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11016422

RE: DLE 30 dies when upright
No I haven't been able to get any flights in because of weather. I live in Colorado and we have had a couple of weeks of miserable weather. I am having a total knee replacement on Wednesday, so It is going to be a while before I get to try again. Thanks for all the suggestions, I appreciate it. Dave
Posted on: 11/6/2011 12:12 PM by Author "DaveE61" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=10799512

RE: DLE 30 dies when upright
Thanks for the advice. I ran the engine in the back yard and the problem is still present. I have followed the advice to ensure it isn’t rich, but it still isn’t right. When I turn the airplane inverted it quits. The problem must be with the pickup in the tank. I am going to get a heavier clunk and some gas-tolerant tubing that is more flexible for the pickup than the Tygon I am using.. My testing was done with ½ tank so I am thinking the pickup isn’t moving quickly enough to stay submerged in gas. I am also suspicious that the fuel tank vent line might be getting pinched in the inverted attitude. I won’t be able to do more testing until late this week. About the discussion of putting tubing on the carburetor vent and routing it into the fuselage: I have flown a DL50 for 2 years in an Extra 300. I would set the needles with the cowl off and then put the cowl on and fly; it would be slobbering rich. After taking the cowl on and off many times I routed the carburetor vent into a pill bottle in the fuselage and I had no more problems setting the needles with the cowl off and then putting it on. The settings stayed the same. Thanks, Dave
Posted on: 10/23/2011 4:02 PM by Author "DaveE61" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=10779082

DLE 30 dies when upright
I have a new rear carb DLE 30 with about ½ gal thru it. It dies every time I fly inverted for more than a few seconds. Actually the engine is upright during this period of time. I have done the following to the engine: I fly at 5,000 ft so I have adjusted the needles. High speed is maxed and then backed off about 200 rpm. Low needle is adjusted so I don’t get a midrange burble, but might be a bit rich I have soldered a piece of copper tubing to the hole on the diaphragm cover and routed it to a pill bottle in the fuselage with a small hole in it. Took apart the tank, made sure the clunk was free to move from top to bottom. The plumbing from the tank to the carb is about 3” of tubing with a tee in it for filling the tank. Vent goes across the top of the tank to the back and then forward and out the bottom of the plane Idles very well Transitions very well Lawn Boy at 32/1 Will run forever if I stay upright most of the time. Sags during the inverted portion of slow rolls At 1/ 2 to 2/3 throttle with the airplane inverted, engine upright, it runs for a max of 5 seconds and quits. I have not tried inverted flight at full throttle. The engine just slows down and quits so I don’t think it is going lean as that usually speeds up before it quits. I fly off a very small strip so engine outs are always nail biters and I prefer to not experiment a whole bunch. Sorry for the long post, but I really need some help with this one. Thanks, Dave
Posted on: 10/21/2011 3:35 PM by Author "DaveE61" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=10776563