RE: BME 115 Any Field Reports?  
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RE: BME 115 Any Field ... - 9/21/2007 9:09:30 PM   
RTK


 

Posts: 4089
Joined: 4/20/2003
From: CENTRAL , CA, USA
Status: offline 		Well if it ran fine the first time out something has happened. Did you change the tank out after or before this last outing??? I would check the screen, make sure all is in order with the carb. The modifing tube is still there and all bolts are tight with no air leaks.
When tuning the modified carb you almost have to go opposite of normal needle setting. The low needs to be richer and the high leaner, I know it sounds back wards, but believe me it works much better that way. The low on this carb has little to no affect on midrange, but the high sure does. Slowly start leaning the high and richening the low. You will find the sweet spot.

(in reply to SMALLFLY-)
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RE: BME 115 Any Field... - 9/21/2007 9:31:02 PM   
Steve



Posts: 1760
Joined: 12/2/2001
From: Ashton, ID, USA
Status: offline 		It does sound like a fuel restriction issue some where in the system. Do what RTK said. Your clunk line may be at fault also.

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RE: BME 115 Any Field... - 9/21/2007 9:58:35 PM   
Hammbone



Posts: 1437
Joined: 1/5/2002
From: Fort Collins, CO, USA
Status: offline 		tonyc,
I wish you continued success, but be aware that my engine has always run good on the ground and always run bad in the air.
Just because your engine ran good on the ground doesn't mean you won't have any problems. Be careful and keep some altitude until you know for sure.

Jim

(in reply to Steve)
       Post #: 803

RE: BME 115 Any Field... - 9/21/2007 10:59:08 PM   
tonyc



Posts: 745
Joined: 2/8/2002
From: ruston, LA, USA
Status: offline 		Jim, you are right on the ground is not the same as in the air. With my 3-W 60 I had about 6 dead stick landings. It was never the fault of the engine, I just didn't have it dialed in and it took a few tries. Good luck testing the "Patrick fix". I hope that his product is a real break through and that everyone benifits from it. What I have noticed reading a lot of posts is that a lot of people have had carburator problems and have gotten past them. But not everyone has meet with success. Good luck on yours

Tony

(in reply to Hammbone)
       Post #: 804

RE: BME 115 Any Field R... - 9/21/2007 11:03:23 PM   
texomalaser



Posts: 269
Joined: 9/26/2005
From: sherman, TX, USA
Status: offline 		Smallfly....Are you running a breather tube from the diaphram plate.?.Mine did that exact thing one time and it was becasue I had the hose fromt he tube too small...

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       Post #: 805

RE: BME 115 Any Field R... - 9/23/2007 11:16:42 PM   
SMALLFLY-



Posts: 2151
Joined: 12/9/2001
From: Evansville, IN, USA
Status: offline 		I flew it several more flights today. the new tank, no breather tube etc had no effect. BUT what seems to be making it better is continual leaning on the high end. every flight today I leaned it more. On the last flight the thing had so much power on the ground it litterally lifted itself off the ground while being held. Kinda surprised me and my holder. It's doing much better on the verticals but still stumbling off if entered too slowly and too much thottle applied during the vertical. It screams on the ground but still seems to be very rich in the air and Im WELL below 1 turn on the high needle now. Like others Ive read it stumbles going into KE and some inverted. Never had a engine carb combo act like this and of course on this engine especially continuing to go lean makes me nervous but it's the only thing that seems to be making it better

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RE: BME 115 Any Field... - 9/24/2007 3:56:06 PM   
Hammbone



Posts: 1437
Joined: 1/5/2002
From: Fort Collins, CO, USA
Status: offline 		SMALLFLY,
You want to get the high end a little on the lean side and the low end a little on the rich side. This is where we've had our best results anyway.
We ended up at about 3/4 turn out on the high end needle, and 2 turns out on the low end needle. This is where the engine seemed to run best. Unfortunately, this will allow you to fly around in circles and that's about it. Once you start trying some manuevers, the engine will start burbling, sagging, and/or dieing.

Jim

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       Post #: 807

RE: BME 115 Any Field... - 9/28/2007 6:31:52 AM   
Steve



Posts: 1760
Joined: 12/2/2001
From: Ashton, ID, USA
Status: offline 		An update on the motor up here in Idaho. The plane flew 3 more times today. The low end was leaned a little more, as was the high end needle. Ron did some flat spins and blenders at idle with the plane and the motor just kept on ticking. The mid range still is a little raspy, but all the twins I've been around are the same. The motor performed very well now that it is tuned right. The thrust was checked and its pulling about 44 lbs of thrust on the ground at 5000 feet above sea level with a 27 X 10 prop, and we think its still a little rich on the top end, but not bad at all.

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AKA,, "The Spleen"
If you want to see my Super Power,,, pull my finger.

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       Post #: 808

RE: BME 115 Any Field... - 9/28/2007 2:14:42 PM   
tonyc



Posts: 745
Joined: 2/8/2002
From: ruston, LA, USA
Status: offline 		Thanks for the update. I just ordered a 3W 27X10 prop to break in my BME 115. The 28X12 I used for a quick bench test was just the wrong propeller. I must build faster so that I can see what that motor will do in the air.

Tony

(in reply to Steve)
       Post #: 809

RE: BME 115 Any Field... - 9/28/2007 6:15:15 PM   
Steve



Posts: 1760
Joined: 12/2/2001
From: Ashton, ID, USA
Status: offline 		Tony,
what plane are you putting the engine in?

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AKA,, "The Spleen"
If you want to see my Super Power,,, pull my finger.

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       Post #: 810

RE: BME 115 Any Field... - 9/28/2007 8:18:04 PM   
tonyc



Posts: 745
Joined: 2/8/2002
From: ruston, LA, USA
Status: offline 		Its a scratch built Pitts Special, 80 inch wing span, Pitts Red Bull scheme in all red. I am about 2 months away from done.

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       Post #: 811

RE: BME 115 Any Field... - 9/30/2007 2:30:50 AM   
RTK


 

Posts: 4089
Joined: 4/20/2003
From: CENTRAL , CA, USA
Status: offline 		I am going to test an experimental 3 needle carb tomorrow if the wind is not too bad as it was today I am not too good at landings when winds are at 20 knots 90*

No update. I received an early morning call which canceled my test flights. But,,,,I did get to run it in my backyard that afternoon. Seems to be good, the flights in the air will tell for sure.

< Message edited by RTK -- 10/1/2007 7:31:30 PM >

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       Post #: 812

RE: BME 115 Any Field... - 10/2/2007 1:54:42 AM   
altavillan


 

Posts: 1236
Joined: 10/24/2004
From: Altaville, CA, USA
Status: offline 		My latest 115 mod to make it a dependable engine was tested this last Sunday. First flight the carb was a bit rich, so after a few minutes of flight I landed refueled and reset the needles a little tighter. Second flight, ran my normal 14 minute flight to measure fuel usage. It used the same amount fuel as the old setup and seamed to sound lean on the high end so I refueled and opened the high 1/4 turn. Third flight, snap at takeoff climb to 1500' ag, cut to 1100 rpm idle and tumble to the deck. Climb back up and tumble at 1/4 throttle to the deck same results, no problems whatso ever. After a 14 minute flight of flopping it around every witch way I landed and was happy to put about 1.6 oz. more fuel in the tank than before the mods without No AOA diaphram issues, just a nice dependable running engine.

To learn what mods it took to make the 115 a super running engine it will cost someone $17,000.00 (I wouldn't want to undercut PATDICKS $16,000.00 offer knowing full well mines better.

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(in reply to RTK)
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RE: BME 115 Any Field... - 10/2/2007 2:09:27 AM   
RTK


 

Posts: 4089
Joined: 4/20/2003
From: CENTRAL , CA, USA
Status: offline 		I would make it a round 20,000

(in reply to altavillan)
       Post #: 814

RE: BME 115 Any Field... - 10/2/2007 2:18:41 AM   
altavillan


 

Posts: 1236
Joined: 10/24/2004
From: Altaville, CA, USA
Status: offline 		Yea. You are probably right it took me all day to make it. Have to have a decent proffit.

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I didn''t put the bullet in the fire and you quit talking about my mother! "Cosby, Shop Class, 1968 or so"

(in reply to RTK)