lil-redrex

Thats not the latest version DL engine.

The latest versions conrod is lightened like the DA , has machined slots in it.

Check out post 1077 on page 44

http://www.rcuniverse.com/forum/m_64...44/key_/tm.htm

dogshome

Treadstones HAS got the thick 'ears' though [sm=71_71.gif]

TREADSTONE

Incorect. You show a photograph of a different standard of connecting rod.

Which for some reason appears to have had the forging machined at either end ?

iflyjr

My Feedback: (19)

After seeing the photos I think I just might buy a different brand.

gnirwin

My Feedback: (25)

I own a DL 50 and mine runs very well. One of the reason's I bought mine was reports from knowledgable engine people taking the DL 50 apart and commenting on the quality of it's parts. I wonder if these DL 50 engines are built with different quality levels/materials and castings. I noticed this several years ago with Chinese made machinery and more recently with some of the ARF airplanes that look identical but with different materials in their construction supposedly coming from the same plant.

craigteffe

My Feedback: (24)

You can look at the photos, and then you can run one and i will tell you the proof is in the pudding. My Dl runs very well as does another at our field.

I have herd it told that a smoother port does not make engines run better its the uneneness or the swirls that cause turblence which helps in the mix of fuel and O2.

I know this to be true on dirt bikes.

mmattockx

There is surface roughness and then there is surface roughness... The DL shown has terrible ports and could very much stand a clean up. The DA ports are about right from the looks of it. You want a matte surface finish, not what you see above on the DL. This goes for any intake ports in any internal combustion engine where there is wet flow. The exhaust ports typically do work better with a shiny finish, due to the dry nature of the flow.

I don't know if this scares me off a DL, there are simply too many good reports here to ignore it. But it is enough to convince me that a pre-run teardown would be mandatory just in case...

Mark

Bob Pastorello

My Feedback: (198)

Mark - I'd agree, to my limited experience in such nuances of flow control/port design.... but.... we do not know if this is a "current" DL 50 version as we would see imported into the US or not.... so.... it may not be the same..... or it could be worse....

But my samples are doing just damn fine, for sure....

togatoga

My Feedback: (42)

Unless someone comes out with another set of pics from an engine purchased from the authorised distributor we can never be sure. There are rejects,local consumption only models and export standard models like beer and arf planes from china. Treadstone did say the engines were acquired privately so are they export standard models if differences do exist that is?
I'm not questioning the legitimacy of the pics just wondering if there are different standards of quality if the engines are purchased from different sources.
United hobbies are selling the engines at a lower price at $325/-. Need to know if the finishing is the same or is it not "export" quality if that exists.
Just thinking aloud.
My reasoning is that the "gurus" and "experts" on rcu are mightily impressed with the DL and now we're seeing pics that show otherwise.
I would readily buy any chinese engine if they are good value for money but our club's experience with chinese made engines has been abysmal.

The Super Powerful Engine 26 was a letdown and the Consistently Rough Running Crap 26 was another.Sorry for the pun but thats how I feel.

I reckon things should improve with more players coming in as even now rcexl ignition systems have a garnered a good reputation.

mmattockx

Indeed, Ralph Cunningham gave one his once over and was very complimentary. And Ralph does not give away praise lightly or accept shoddy work. I have one of his G-62 conversions and his workmanship is first rate and I believe he expects the same from others.

Mark

Flyfalcons

Buy quality and you'll only cry once.

dogshome

Spanners and keys out then

karolh

Guys, do we really have a big problem here even if the machining work is not of the very high standard of a DA or other units for that matter. As long as it does not affect the structural integrity of the engine, and the engine performs well, as so many user reports suggest, don't you think it is okay.

Plus at this point in time the jury seems to be still out as to wether the sample being inspected is in fact similar to the units currently being offered on this side of the pond, and judging from Ralph's very favourable comments when he inspected one not too long ago gives me the impression that it might not be apples to apples.

Karol

Magne

I work for a company that has a manufacturing facility in China.
(Completely different product not related to this hobby.)
The factory is an assembly shop, which purchase components from a number of different suppliers. So even though the end product is supposedly the same, and markeded under the same name etc, the individual components are made different places. This may possibly also be the case for DL, in which case the "same" part may come from a number of different sub-suppliers. There may therefore be good, and not so good copies, not necessarily because they are intended for different markets, but simply because the individual components have been manufactured different places. I am pretty sure DL don't "make" all the parts themselves, but purchase from sub-suppliers. (Like most other manufacturers do, in fact.)

Magne

closetguy

My Feedback: (13)

i been wanting to give this engine a try,but it is a real hit or miss.just seems that there is no standards of quality. for me they will need to get the spark plug hole to fit the plug better.as often as we take the plug out to look at it, and see what color it is.this is something that i want to fit right.

you shouldn't half to worry about where the engine is bought from to figure out if you have a good one or not.

but DL has made improvements, (standoffs,heavier engine lugs).it will just take time to get the bugs work out.

Pistolera

Mine should arrive today, so I'm am anxious to see what it looks like compared to the pics posted. I plan to pull the cylinder and take a peek inside as soon as I find a hex wrench long enough to get to the bolts. Will try and post some pics if I get the time. Mine is coming from Bob at DLUSA in Irving, TX.

TREADSTONE

Fair and valid points...

More photo's and some figures later...

mrbigg

My Feedback: (21)

Can't wait since he's the main distributor here.

dogshome

I agree. Piecemeal with parts subbed out.

Treadstones cylinder and head is nasty compared to mine. I doubt the performance is much different, but that head bowl is Eeyuk! [:@]

captinjohn

Looks can be very deceiving. Take ports for a example. You would think a shinny smooth port would be the best. Not so. My Cousin built 2 cycle racing engines and held the WORLD,s fastest record for drag racing snowmobiles for 10 years. He had a air flow device to check ports. A mirror Finnish hinders the flow ...air can cling to it. Just the right surface is what you need. Oh... By the way....I can post a photo that was in the paper about the world records my cousin held. He is gone now and sadly missed by many. Capt,n

closetguy

My Feedback: (13)

one more thing thanks for the side by side photo's.i am surprise it hasn't been done before.

TREADSTONE

..Thought i would get the NIB DL out and have a look in that...sourced privetely in the U.k. but one of the first with the thicker mount lugs....compair picks the NIB is the left pic..

JNorton

My Feedback: (2)

I received my DL-50 several weeks ago from Bob at DLUSA. My plug threads look fine. The plug seems to fit normally.
John

EDIT-> Added close up

TREADSTONE

....NIB DL seems to have a Third standard of Conrod...the oil slots are diffrent...

TREADSTONE

...Measured the ring clearence...exactly the same on all three pistons 0,6mm..