RE: Dle-20 Blew up....    Gallery
View related threads: (in this forum | in all forums)

Logged in as Guest



Users viewing this topic: none
    Search This Thread  
 
Printable Version

All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> Gas Engines >> RE: Dle-20 Blew up....
Page: <<   < prev  1 2 3 4 5 [6]

Tower Hobbies Get Coupon Codes Brands  
Login
Message << Older Topic   Newer Topic >>
RE: Dle-20 Blew up.... - 11/11/2012 7:30 PM   
Speedy-Gonzales


 

Posts: 1019
Score: 141
Joined: 3/7/2004
Last Login: 6/20/2013
From: Bryan, OH, USA
Status: offline 		I agree. Sometimes it is just a matter of which engine was delivered to your door and "Murphy's Law".

Hide Signatures

(in reply to TimBle)
       Post #: 126

RE: Dle-20 Blew up.... - 11/11/2012 8:15 PM   
Truckracer


 

Posts: 2564
Score: 309
Joined: 4/3/2004
Last Login: 6/20/2013
From: Des Moines, IA, USA
Status: offline
quote:

ORIGINAL: Speedy-Gonzales

I agree. Sometimes it is just a matter of which engine was delivered to your door and ''Murphy's Law''.


I've been at this hobby for quite awhile now and have bought more then a few engines over the years. I've bought quality and I've bought cheap along the way and the "sort of" rule you stated above pretty much applies to all of them! In fact, it pretty much applies to just about everything we buy. Spending more doesn't always guarantee a trouble free owner experience.

Hide Signatures

(in reply to Speedy-Gonzales)
       Post #: 127

RE: Dle-20 Blew up.... - 11/11/2012 8:54 PM   
Speedy-Gonzales


 

Posts: 1019
Score: 141
Joined: 3/7/2004
Last Login: 6/20/2013
From: Bryan, OH, USA
Status: offline 		I'll agree on that statement too!!!!

Happy Veteran's Day!

< Message edited by Speedy-Gonzales -- 11/11/2012 9:46 PM >

Hide Signatures

(in reply to Truckracer)
       Post #: 128

RE: Dle-20 Blew up.... - 11/12/2012 12:22 AM   
karolh


 

Posts: 5705
Score: 315
Joined: 5/16/2002
Last Login: 6/20/2013
From: Mandeville, JAMAICA
Status: offline
quote:

ORIGINAL: Truckracer


quote:

ORIGINAL: Speedy-Gonzales

I agree. Sometimes it is just a matter of which engine was delivered to your door and ''Murphy's Law''.


I've been at this hobby for quite awhile now and have bought more then a few engines over the years. I've bought quality and I've bought cheap along the way and the ''sort of'' rule you stated above pretty much applies to all of them! In fact, it pretty much applies to just about everything we buy. Spending more doesn't always guarantee a trouble free owner experience.


So very true as I bought a Zenoah engine that ran quite well but had a ring gap of .037".

Karol

_____________________________

When inverted always remember that down is up and visa versa

Hide Signatures

(in reply to Truckracer)
       Post #: 129

RE: Dle-20 Blew up.... - 11/12/2012 1:54 AM   
757jonp


 

Posts: 177
Score: 110
Joined: 9/5/2008
Last Login: 6/18/2013
From: williamsburg, VA, USA
Status: offline 		Blackpowder..and everyone else too!

Just finished checking the timing on the DLE20 that threw it's pin. It was set right at 30 degrees. No problem there.

Weather was just great around here this w/e. I spent a lot of it just thrashing this Mojo/DLE20/Xoar17X6 combo to the limit. Plane weighs right at 10 lbs wet and it will pull it around like a rag doll! I can't prove it, but I wouldn't be surprised if I was exceeding 10K rpm at times.

No, I'm not going to back off of it one bit. It'll either hold up..... or not. Time will tell.

Hide Signatures

(in reply to karolh)
       Post #: 130

RE: Dle-20 Blew up.... - 11/12/2012 3:25 AM  1 votes
ahicks


 

Posts: 1914
Score: 669
Joined: 8/10/2008
Last Login: 6/20/2013
From: Waterford, MI, USA
Status: online 		You should be pretty safe with a 17x6. That and the 16x8 are likely the most popular props run on this engine?

Hide Signatures

(in reply to 757jonp)
       Post #: 131

RE: Dle-20 Blew up.... - 11/12/2012 3:47 AM   
BlackPowder


 

Posts: 123
Score: 105
Joined: 5/24/2007
Last Login: 2/27/2013
From: Rio Rancho, NM, USA
Status: offline 		757jonp,
Thanks for the info. I set mine at 30 degrees. I will check the one that I've been flying tomorrow. It's on a GP Super Skybolt, 9.5 pounds spinning a 14 x 10 at 8500, but I'm at over 5000 ft.

Hide Signatures

(in reply to 757jonp)
       Post #: 132

RE: Dle-20 Blew up.... - 11/12/2012 4:55 AM   
Ernie Misner



Posts: 4673
Score: 130
Joined: 7/5/2002
Last Login: 6/12/2013
From: Tacoma, WA, USA
Status: offline 		Please correct me if wrong but I believe that just because we "set" the timing at 30+ degrees does NOT mean that is where the CDI unit will be timing the engine when running and up to top speed. The 30+ or whatever is just a benchmark which will give the correct timing of 27 - 29 degrees when running. Of course the timing is retarded much below that figure when at lower rpms.

And a DLE ignition unit will require more advance when "setting" the timing than a RCEXEL unit on the same engine. But once running at top speed they both give the same result, 27 - 29 or so degrees.

Hide Signatures

(in reply to BlackPowder)
       Post #: 133

RE: Dle-20 Blew up.... - 11/12/2012 5:50 AM   
flyboy75


 

Posts: 10
Score: 100
Joined: 9/12/2007
Last Login: 5/26/2013
From: Vernon, CT, USA
Status: offline 		I design aerospace bearings for a living. It is a manufacturing flaw. The bearing failure / damage was scondary to pin fracture.

Speedy-Gonzales is 100% correct. QC in China is horrible. I suspect you are not the fist DLE owner this has happened to.

Hide Signatures

(in reply to KoleDeRacer)
       Post #: 134

RE: Dle-20 Blew up.... - 11/12/2012 5:59 AM   
thailazer



Posts: 768
Score: 110
Joined: 3/16/2008
Last Login: 6/20/2013
From: Ampur Mae TaengChiang Mai, THAILAND
Status: offline
quote:

ORIGINAL: KoleDeRacer

The galling happened after it was blown up more then likely from the prop turning on the way down and getting scratched on the crank.
The ignition is model A-01


I've never seen galling like that on a single cylinder engine. Doubtful the prop could turn it over after the failure. Might make sense to do some checking to find out if something else (like a missing thrust washer or mis-installed bearing) could have caused the galling and led up to the failure. Thanks for posting the photos. Very interesting thread and I hope you get to the root cause.

_____________________________

Tiger Flyer #49

Hide Signatures

(in reply to KoleDeRacer)
       Post #: 135

RE: Dle-20 Blew up.... - 11/12/2012 3:26 PM   
757jonp


 

Posts: 177
Score: 110
Joined: 9/5/2008
Last Login: 6/18/2013
From: williamsburg, VA, USA
Status: offline 		Hey Ernie

DLE ignition is a RCEXEL with a DLE sticker on it first of all. When doing static timing, you are sensing the advanced position. The unit will not retard until movement (RPM) is detected (I believe the minimum is about 200 RPM).

BTW, I just received a new ignition from Hobby King that I ordered out of curiosity. $23.99 and got shipped with other stuff, appears to be what we know as RCEXEL with a "Paragon" brand name on it. Not sure what model it is, but more than likely it's an 01. Hopefully it has a more "friendly" ignition curve. I'll let u'alls know what I find out shortly.

Hide Signatures

(in reply to thailazer)
       Post #: 136

RE: Dle-20 Blew up.... - 11/12/2012 4:54 PM  1 votes
BlackPowder


 

Posts: 123
Score: 105
Joined: 5/24/2007
Last Login: 2/27/2013
From: Rio Rancho, NM, USA
Status: offline 		I set the timing at 28 degrees because that is where Rcexl recomends and also I believe that C&H does the same. So on other engines that I have used the Rcexl ingition on that was my startng point. I think that it makes it easer to start and after when its running I have no idea if it advances to make power. Thats how my race car ignition works. ? To quote Speedy I'm not an expert, I just read the instructions.

Hide Signatures

(in reply to Ernie Misner)
       Post #: 137

Page:   <<   < prev  1 2 3 4 5 [6]
All Forums >> Glow Engines, Gas Engines, Fuel &amp; Mfg Support Forums >> Gas Engines >> RE: Dle-20 Blew up....
Page: <<   < prev  1 2 3 4 5 [6]





Jump to:


 
Google 



Search | Marketplace | Event Calendar | Local Clubs | Magazine | Product Ratings | New Products | Discussion Forums

Photo Gallery | Instructor Search | Field|Track|Marina Search

Advertisers | Hobby Vendor Resources | Rate Manufacturers | Sign In/Sign Up

SITE MAP!   : :   FORUM RULES

RC Universe is a service of Internet Brands, Inc. Copyright © 2001-2013.

Charities we support that also need your help
Yorkie Rescue | Humane Society | ASPCA | Crohn's-Colitis America


0.531RCU1