Notices
Gas Engines Questions or comments about gas engines can be posted here

MLD-28 gasoline engine

Old 04-04-2012, 11:50 AM
  #1351  
rexbirk
 
Join Date: Dec 2001
Location: Gahanna, OH
Posts: 529
Likes: 0
Received 0 Likes on 0 Posts
Default RE: MLD-28 gasoline engine


ORIGINAL: AA5BY

Rex... to respond to the question in your tag line... If a circle flyer is having fun and that is what his comfort zone allows... how could that be a bad thing.

We once had a left turn only circle flyer at our field... only flying with a South wind.
That's a good one! I fly circles both ways. I added that signature because my son is a hard core 3D flyer and gives me grief all the time cause I don't enjoy 3D. Give me fast smooth maneuvers any day.

The advantage I have over him is when we go to a 3D event I have all the sky above 50 feet or so to myself mostly!
Old 04-04-2012, 11:52 AM
  #1352  
rexbirk
 
Join Date: Dec 2001
Location: Gahanna, OH
Posts: 529
Likes: 0
Received 0 Likes on 0 Posts
Default RE: MLD-28 gasoline engine


ORIGINAL: lovefool

REX,

I hope you won't have any trouble in the air ! Cross fingers.
I don't anticipate any. I ran the engine out in the yard on a warm day. I ran it full throttle and checked for any signs of detonation or excessive heat. Found none. The rpm's were close to the same as I was getting with the MLD Ignitons when they ran fine. I did notice that starting was much easier with the RcExcel Ignition and the throttle response was better.
Old 04-09-2012, 12:10 PM
  #1353  
rexbirk
 
Join Date: Dec 2001
Location: Gahanna, OH
Posts: 529
Likes: 0
Received 0 Likes on 0 Posts
Default RE: MLD-28 gasoline engine

An update on the RcExcel Conversions.

Flew each plane 4 or 5 flights this past Saturday. What a difference! Starting was easy. They ran great. Good throttle response and great power. My Slick was flying with an 18x6 Vess. I broke it last week so it got an 18x8 Vess for it's maiden with the RcExcel Ignition. It had more power with the 18x8 with the new ignition than it did with the 18x6 and standard ignition.

I am impressed. They both had zero issues.

I am thinking that my timing measurements were flawed somehow. As I stated earlier, I put the RcExcel sensor exactly where the standard sensor was. No problem. Worked fine there.

RcExcel Ignitions are great!
Old 04-09-2012, 10:53 PM
  #1354  
lovefool
Member
 
Join Date: Aug 2004
Location: OdawaraKanagawa, JAPAN
Posts: 56
Received 0 Likes on 0 Posts
Default RE: MLD-28 gasoline engine

REX,

congrats on your successful flights!

Anyway I gonna check which angle from BDTC the magnet is installed on my MLD-28 later.

Jay.
Old 04-11-2012, 10:50 AM
  #1355  
rexbirk
 
Join Date: Dec 2001
Location: Gahanna, OH
Posts: 529
Likes: 0
Received 0 Likes on 0 Posts
Default RE: MLD-28 gasoline engine

When I get time I am going to measure the timing to see just what I have. For now they run fine with no apparent problems. No sound of detonation and they are not running hot at all. My initial timing check may have been faulty.
Old 04-11-2012, 10:56 AM
  #1356  
captinjohn
 
Join Date: Jan 2002
Location: Hesperia Michigan, MI
Posts: 12,957
Received 4 Likes on 4 Posts
Default RE: MLD-28 gasoline engine

I seen a MLD 28 on a nice airplane in Florida...the Guy never flew the airplane it was on the 2 days I was there at the RC field!!!!! Capt,n
Old 04-16-2012, 01:40 PM
  #1357  
rexbirk
 
Join Date: Dec 2001
Location: Gahanna, OH
Posts: 529
Likes: 0
Received 0 Likes on 0 Posts
Default RE: MLD-28 gasoline engine

More flights this past Friday. All is well. Starts and runs great now. RcExcel, that's the ticket!
Old 04-16-2012, 01:41 PM
  #1358  
flyracer
Member
 
Join Date: Nov 2011
Location: Chandler, AZ
Posts: 57
Likes: 0
Received 0 Likes on 0 Posts
Default RE: MLD-28 gasoline engine

now you've got me tempted! do I spend another $50 or junk the engine?
Old 04-16-2012, 03:50 PM
  #1359  
rexbirk
 
Join Date: Dec 2001
Location: Gahanna, OH
Posts: 529
Likes: 0
Received 0 Likes on 0 Posts
Default RE: MLD-28 gasoline engine

With the RcExcel ignitions they are like new engines! I have converted two. Both run great! I have f***ed around with 5 of them for over 2 years. My problems are over. They run like clocks now. I did get the universal sensor holder and filed down the mounting lugs to get the sensor closer to the magnet.

You won't even believe they are the same engine afterwards. They still run very smoothly but they start easy, idle well and have great throttle response.

Remember though that RcExcel Ignitons use no more than 6 volts so either a regulator or IBEC with selectable voltage is needed.

I am up to 10 or 11 flights with no problems other than getting the mixture re-adjusted.
Old 04-16-2012, 05:05 PM
  #1360  
AA5BY
 
Join Date: Sep 2006
Location: White Oak, TX
Posts: 2,398
Likes: 0
Received 2 Likes on 2 Posts
Default RE: MLD-28 gasoline engine

Over on the MLD-35 thread, I related my troubles with a new MLD-35. Started easily and idled great but would miss above idle, and wouldn't lock on a top rpm. And... it had RF problems that drove the elevators hard over (one each direction).

I didn't waste time messing with it... ordered an RCexl, which came today and took about an hour to install. It started easily, no longer has a miss, goes to full rpms and locks there and produces no RFI. I mounted the hall effect transistor with the same screws and in the same location as the one removed.
Old 04-16-2012, 05:08 PM
  #1361  
flyracer
Member
 
Join Date: Nov 2011
Location: Chandler, AZ
Posts: 57
Likes: 0
Received 0 Likes on 0 Posts
Default RE: MLD-28 gasoline engine

Ok... I hate failing... I"m gonna spend $50 and order an RCexel ignition....
Old 04-19-2012, 02:59 PM
  #1362  
rexbirk
 
Join Date: Dec 2001
Location: Gahanna, OH
Posts: 529
Likes: 0
Received 0 Likes on 0 Posts
Default RE: MLD-28 gasoline engine

That's how I felt. I did get the plug adapter to use the cm6 plug since my 50cc planes use them. Got my Ignitions from RcExtreme Power. Great guy to deal with!

http://rcextremepower.net/
Old 04-19-2012, 03:00 PM
  #1363  
rexbirk
 
Join Date: Dec 2001
Location: Gahanna, OH
Posts: 529
Likes: 0
Received 0 Likes on 0 Posts
Default RE: MLD-28 gasoline engine

I think we have a continuing trend with MLD Ignitions. Hard to believe it has not been corrected. Other than that they are great engines.
Old 04-19-2012, 06:50 PM
  #1364  
AA5BY
 
Join Date: Sep 2006
Location: White Oak, TX
Posts: 2,398
Likes: 0
Received 2 Likes on 2 Posts
Default RE: MLD-28 gasoline engine

It is not just the Melody ignitions... I'm love my Zenoah engines but don't care for the ignitions.
Old 04-22-2012, 09:03 AM
  #1365  
rexbirk
 
Join Date: Dec 2001
Location: Gahanna, OH
Posts: 529
Likes: 0
Received 0 Likes on 0 Posts
Default RE: MLD-28 gasoline engine

More flights today on the RcExcel Ignition. It was very cold and windy but the engine ran like a clock. Have at least 10 flights now and have not have to touch a thing!
Old 05-15-2012, 06:00 AM
  #1366  
AA5BY
 
Join Date: Sep 2006
Location: White Oak, TX
Posts: 2,398
Likes: 0
Received 2 Likes on 2 Posts
Default RE: MLD-28 gasoline engine

A word of caution on the change to RCexl. The RCexl pickup sensor mount provides for sliding the sensor housing fore and aft to locate the sensor over the hub magnet. I failed to glue it in place once adjusted and it worked back and on the fourth flight the ignition failed due to the sensor position. Fortunately I was high when it went dead and landed front and center but it could easily have been fatal.

Don't forget to glue the sensor to its mount once aligned with the magnet.
Old 05-15-2012, 07:11 AM
  #1367  
flyracer
Member
 
Join Date: Nov 2011
Location: Chandler, AZ
Posts: 57
Likes: 0
Received 0 Likes on 0 Posts
Default RE: MLD-28 gasoline engine

I went ahead and bought an RCexl ignition and slapped that on my MLD28.... yes, I noticed the hall sensor slides back and forth in the cradle/mount. I did glue mine in place as this looked like a failure point.

I opted for the plug cap that fits the stock MLD28 spark plug.... and it's way loose! it's loose to the point where at high RPM it rattles and causes RF and servo chatter. I've got a replacement cap on order that should fit snug around the stock plug. Stay tuned.

Flyracer
Old 06-08-2012, 03:32 PM
  #1368  
rexbirk
 
Join Date: Dec 2001
Location: Gahanna, OH
Posts: 529
Likes: 0
Received 0 Likes on 0 Posts
Default RE: MLD-28 gasoline engine

Flyracer,

What's happening with your engine? Mine have been performing great with the RcExcel Ignitions.
Old 06-09-2012, 07:06 AM
  #1369  
flyracer
Member
 
Join Date: Nov 2011
Location: Chandler, AZ
Posts: 57
Likes: 0
Received 0 Likes on 0 Posts
Default RE: MLD-28 gasoline engine

Rex

I think the new ignition was a huge improvement, but I'm done messing with the MLD28.... I'm giving the engine to a friend. Moving forward I'm sticking with DLE or RCFG engines. My experience with MLD brand was just to painful

Flyracer
Old 06-09-2012, 10:08 AM
  #1370  
airborne2.4
Senior Member
 
Join Date: Jan 2006
Location: Freeport, BAHAMAS
Posts: 1,174
Likes: 0
Received 0 Likes on 0 Posts
Default RE: MLD-28 gasoline engine

Try the New OS GT33.
Don't forget DA's 35cc should out this summer
Old 06-16-2012, 05:31 PM
  #1371  
rexbirk
 
Join Date: Dec 2001
Location: Gahanna, OH
Posts: 529
Likes: 0
Received 0 Likes on 0 Posts
Default RE: MLD-28 gasoline engine

Since the Ignition change to RcExcel my MLD 28's just keep getting better. Flew my 3D Hobby Shop Extra 330 again today. As I have dialed in the needle's the performance has gotten better and better. Outstanding power today even in upper 80's temps and humid. For a cheaply priced engine they run great. Yes it has been a headache getting thru the ignition maladies but I was stubborn and did not give up. I'm very happy with them now. I have two flying and both are running great. Got to change the ignition it seems!
Old 06-16-2012, 06:34 PM
  #1372  
AA5BY
 
Join Date: Sep 2006
Location: White Oak, TX
Posts: 2,398
Likes: 0
Received 2 Likes on 2 Posts
Default RE: MLD-28 gasoline engine

I'm equally as happy with the MLD-35 after changing the ignition. Performance is great and starting ease couldn't be better, which leaves only durability as the unknown.
Old 06-17-2012, 06:42 AM
  #1373  
rexbirk
 
Join Date: Dec 2001
Location: Gahanna, OH
Posts: 529
Likes: 0
Received 0 Likes on 0 Posts
Default RE: MLD-28 gasoline engine

I'm sure the 35 puts out a lot more ponys than my 28 does!
Old 06-17-2012, 07:14 AM
  #1374  
AA5BY
 
Join Date: Sep 2006
Location: White Oak, TX
Posts: 2,398
Likes: 0
Received 2 Likes on 2 Posts
Default RE: MLD-28 gasoline engine

Probably only a few more. As you are likely aware... the forum was asked to assist with design of the 35. Suggestion for the angled plug for example came from this forum and was incorporated into the design. IIRC, it was also suggested to go with an RCexl ignition but that one didn't happen.

My MLD-35 is swinging a Vess 20A at 7400. It is on a 96" 16.5 lb plane and pulls it pretty well with large loops and high climbs to stall turns. My guess is that thrust is somewhere around 15 lbs.

Antique claimed it slightly more powerful than the DLE-30
Old 06-17-2012, 07:19 AM
  #1375  
BadAzzMaxx
 
Join Date: Dec 2005
Location: Auburn, GA
Posts: 1,369
Likes: 0
Received 1 Like on 1 Post
Default RE: MLD-28 gasoline engine


ORIGINAL: flyracer

I went ahead and bought an RCexl ignition and slapped that on my MLD28.... yes, I noticed the hall sensor slides back and forth in the cradle/mount. I did glue mine in place as this looked like a failure point.

I opted for the plug cap that fits the stock MLD28 spark plug.... and it's way loose! it's loose to the point where at high RPM it rattles and causes RF and servo chatter. I've got a replacement cap on order that should fit snug around the stock plug. Stay tuned.

Flyracer
There should have been a plastic wedge that you install to hold the sensor into the sensor bracket.

If the plug cap is lose you have the wrong plug cap on your ignition.

Milton

Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service -

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.