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ORIGINAL: qspilotcmh
Has anyone tried the Profile muffler Valleyview RC sells? If so how did it effect peak RPM, Idle, and noise DB.
Thanks

quote:

ORIGINAL: a1pcfixer

Try deleting your browser cookies related to rcuniverse.com
You'll need to do a refresh and re log-in afterwards.

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ORIGINAL: a1pcfixer

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ORIGINAL: nefariousrc

And I've read that first post a dozen times; each time learning something new.  I just wish the hyperlinks would work for me.  None of the links to RCU content work.

Thanks!!

A dozen times and ya missed this one?

Jody's gas engine tuning tips (pdf files);
http://www.rcuniverse.com/forum/fb.asp?m=10293852

Btw; I created that Recap of the DLE20 thread, imbedded into msg #1, and I just checked, all links work fine.

quote:

ORIGINAL: mschulz531

Like what was said earlier: you always learn something new (or relearn) every time you read that first post in this thread. 
-Mike

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ORIGINAL: jedijody

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ORIGINAL: Ruddermadness

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ORIGINAL: mesaflyer

First, I want to pass on a big Thank You to Jody at Valley View. I have never talked with him, just e-mails. He has gone above and beyond the norm in helping me with my DLE 20 (and another engine I have).

I recently ran my engine a little warm (ok, HOT) because it did not have enough air flow, the engine died and the plane made a hard landing/crash. I'll make another post when I get a chance that has pictures of what happened. The plane is back together, but more importantly, with Jody's help, I installed a new piston, ring, and spark plug. I also cleaned out the carbon build up in the head area. So I needed to run a tank thru it on the ground at low idle. While doing this, the engine jumped up in rpm's all by itself. I have read several people stating the rpm won't drop to idle right away, and that is what mine was doing from day one. I could almost tune it so that it did not have this problem, but it still did it. I just learned to land the plane knowing that this will happen. Anyway, while running the engine at low rpm's, I had my son make a video of the rpm change. You will see that when making small throttle-up adjustments with the trim tab, the throttle will jump up over 1000 rpm's. When adjusting the throttle trim back down, the rpm will jump back down. The engine in the video is not tuned for flight. The needles are set at 1 1/2 out on the high, and 1 turn out on the low.

Here is the link to the video: http://www.youtube.com/watch?v=pdZl40bE3DE&feature=channel_video_title

I'm not complaining here, I love this little engine. Pulls my GP Extra 300 around beautifully. I just wanted people to see the rpm thing that is caused by the weird ignition timing curve. It's also hard to tell, but the rpm's drop real fast after the last throttle down adjustment is made. It does it all by itself.

Oh, and it looks like I am dangerously close to the prop with the transmitter, but it's just camera angle.

Well good luck with it. I pulled mine off it's not worth loseing a plane over it. Up in the air it runs great but trying to get the idle to drop for a landing is a bear. And if it is the ignition mod how come there not replaceing them for free. It sure seem there's a lot people having the same problem!

Good video Pete,

It shows very well what I've tried to explain about the DLE20 ignition and the overlap of the throttle position from when it advances and the RPM increases to needing a much lower throttle position to get it to retard the timing. Notice that from the point at which it advances with just one click of throttle trim it takes at least five clicks in the opposite direction to get the RPM to drop below 2500 RPM which is the advance/retard point so it will retard and the RPM drop to idle speed. This is why setting an idle speed of say 1900 or 2000 RPM will not allow the engine to return to idle, richening the low needle is the wrong thing to do. In order to get it to reliably return to idle you must set the ground idle speed at around 1500-1600 RPM. That will allow the throttle position to be low enough to get below 2500 RPM after it has advanced.

DLE doesn't replace these modules under warranty because they're working the way they were designed to. I agree it's not Ideal but that's the way they're made. A standard Rcexl ignition module eliminates the problem altogether.

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ORIGINAL: qspilotcmh

I have a DLE20 on an Aeroworks profile. The motor mounts sideways and the muffler points straight out parallel to the wing. I would like to attach an exhaust deflector to angle it downwards. I have a Dubro model from a glow motor.

Do you think it would effect the engines performance or temperature.

Thanks

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ORIGINAL: a1pcfixer

quote:

ORIGINAL: qspilotcmh

I have a DLE20 on an Aeroworks profile. The motor mounts sideways and the muffler points straight out parallel to the wing. I would like to attach an exhaust deflector to angle it downwards. I have a Dubro model from a glow motor.

Do you think it would effect the engines performance or temperature.

Thanks

Just get a 90 degree copper elbow (plumbing) like mine.
Runs like a champ, a really great combo!

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ORIGINAL: a1pcfixer

Wow....can't remember ever seeing any size Twist chopped that much in order to fit an engine in it. Ouch!

Too bad H9 quit making the Twist 3D 150. It's the perfect match for a DLE20!
Fits like a glove.

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ORIGINAL: jedijody

The ignition I sent does have auto advance, it's the standard Rcexl ignition identical to the one supplied for the DLE55. The difference is that the advance is increased/decreased in multiple smaller increments along the RPM band between 2000 and about 4000 RPM instead of all the advance/retard at once at a specific single RPM point where some critical maneuvers (like landing) are trying to be performed.

Happy to hear it's working out well for you!

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ORIGINAL: a1pcfixer

quote:

ORIGINAL: qspilotcmh

I have a DLE20 on an Aeroworks profile. The motor mounts sideways and the muffler points straight out parallel to the wing. I would like to attach an exhaust deflector to angle it downwards. I have a Dubro model from a glow motor.

Do you think it would effect the engines performance or temperature.

Thanks

Just get a 90 degree copper elbow (plumbing) like mine.
Runs like a champ, a really great combo!

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ORIGINAL: unclecrash

A1 wondering if thats the 8oz. tank, and if so how long of a run do you get on it.

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ORIGINAL: crazyflyboy30

The only thing is that I would put the fuel tank on the other side.

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ORIGINAL: a1pcfixer


Too bad H9 quit making the Twist 3D 150. It's the perfect match for a DLE20!
Fits like a glove.

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ORIGINAL: sandyjain

Mesaflyer, did you change the hall sensor position I.e. 38to 28 deg. BTDC? I think I recall Jody mention this that using the DLE55 ignition with DLE20 requires for the timing to be changed.

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ORIGINAL: ghoffman

quote:

ORIGINAL: a1pcfixer


Too bad H9 quit making the Twist 3D 150. It's the perfect match for a DLE20!
Fits like a glove.

And they quit making the Ultra Stick 60 and 120 as well. What's up with that?  

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ORIGINAL: mesaflyer

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ORIGINAL: sandyjain

Mesaflyer, did you change the hall sensor position I.e. 38to 28 deg. BTDC? I think I recall Jody mention this that using the DLE55 ignition with DLE20 requires for the timing to be changed.

SJ,
I did not need to change the position, because it did not need it. But I did check it to make sure it's at 28 degrees, and it is.