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Since its gone this far can we discuss removing certain amount of prop bolts to counter vibration,geeze what will they think of next!

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It's installed and ready to go, test flight tomorrow. 18 x 8 JFX prop, Hangar 9 Extra 260. Seems to have good power but not tuned properly yet.

I have personal expieriance with many a 4 leged bar stools that were unstable!

seabee, I don't have the other engine. I was addressing an engineering statement. Your statement that a 4th standoff made a difference was just about as small as them adding value for a ball link. As far as a 4 legged stool goes...it sounds like your brain was burning alcohol, not gas. As usual, operator error.

How loud is the DL 30 compared to a DL 55 with stock exhaust? What quiet mufflers are available for the DL 30 and does anybody have any first hand experience with them?

Is that the 27% 260?
Let us know how she flies

This thread is so off topic that I'm going post this before someone makes me give another 'on topic' talk.

That example doesn't make any sense as one of the ATC wheels is **steerable** I've never seen a barstool with one steerable wheel! The Bell Jetranger used two 3 point mount systems called pylons for the main transmissions. One on each side of the xmission.

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Last comment, ATV's wheels are not mounted to the ground or a firewall

NO reply>>>> Back to DLE30cc engines. Would some of you guys check the throttle side to side play? Please!! I think it may be why the engine do not always come back to the same Idle RPM. You do not need a dial gauge...I just wanted to measure it. .015+ Thanks, Capt,n[X(]

I did this on several engines and posted it when you brought this up a while ago, all were .004"-.006". All come back to the same idle everytime, you got something going on there though with .015", I think that's more than you measured the last time.

I'm getting a kick out of this. The DLE 30 is a good engine, no debate. It CAN be better. But to say it is better because of a manufacturer noted HP rating is ludricous. 3w HAS and USES a dyno, as do others that make heavy use of the engine. The 2.75 HP number for the 28i is not a lie, but accurately represented. No graph extrapolation, no sleight of hand, no fudge factors, but obtained from real dyno tests many, many times. How one gains a full HP with the addition of 2cc's, poor tolerance control, lousy assembly oversight, a crappy induction path, and inferior porting is beyond my comprehension. Over a quarter million flight hours in unmanned platforms seriously attest to the reliability of the 28i, as well as change times in excess of 400 hours with the engine still providing peak performance numbers. Still in good enough shape that even after 400-600 hours they are still useful for a few more safe and effective years of model flying.

As Steve noted, it's useful torque that matters, and that torque must be obtained in an rpm band that would most effectively transfer to the propeller. Start breaking down power values in watts/litre and you start doing a little better power comparisons using a known constant for reference purposes.

The only areas where the 3w-28 lags behind the DLE 30 is in weight and cost. The weight is quite useful in many applications where better heat management is required. Heavy aircraft where more of the engine's flat rated output is required is a perfect example. The three point debate is moot since many, many airframes make effective use of the triple foot without any issues whatsoever, and they work harder than any model ever will. Cost is relative. Don't know how long the 30 will last yet but I KNOW how long the 28 will, and they do so repeatedly.

Yes, I have a DLE 30, have flown a plane with a DLE 30, own a couple of 28i's and have put a lot of hours on them personally. Over 2 thousand documented in the air and another 1,000 plus on the ground, and have access to many more in various induction and fuel configurations at any given moment. I'm not making any claims that a DLE is inferior or not a suitable purchase, but I am casting a lot of doubt about ol seabea's engine assessment qualifications. Which engine will safely pull the heaviest plane without cooking off? The 28 routinely handles well over 40 pounds using a deliberately restricted exhaust system.

I like the DLE 30 quite a lot but I'm not going to buy into manufacturer advertising unless I know how the data was obtained. If it came from a thust calculator it is seriously suspect.

Oh, yea, my oldest daughter manages to roll one of the family quads on a regular basis. Kid drives like a cop...

Ok guys, I have not seen this come up in awhile. Maybe I missed it. Has the issue (i.e. Tilt and die problems)you all were discussing earlier been fixed? I am seriously considering one of these engines now as opposed to the Zenoah G26ei. Before I pull the trigger on this engine how many of you are still experiencing problems and is it a problem in the air? Hope I am not stirring a hornets nest here but I need a reliable engine to fy behind.

Thanks in advance

Glenn Williams
[email protected]
AMA#938050

TOM...The DLE30cc engine is lite. A lot of us want to put them on lite aircraft. Most likely noboby will put it on a 40 pound plane to see if the engine can be cooked. It don,t matter how many engines you have played with. This is a new design & is right now the most powerfull 30cc engine for the weight. Some are tricky to tune but all the kinks in these engines can be worked around if a person is willing to read what to do. In some cases...nothing but break the engine in. I have had nothing but compliments on my DLE30 when I run it. Parts are going to be easy to get if a guy wants to change or modify It for some reason. I still say it is one of the best for your $$ engine. The DL company has said they will improve it even more. I believe they will. Others must think so too....a lot of places are selling them....even T. Hob.... Capt,n

The problem is "NOT" in the air, but on the ground which is a non-issue. If you tilt it enough while the wheels are touching you're gonna break the prop or even do more damage.

Hi Glenn,

This is a two part answer:

part 1)
The DL-30 in it's stock configuration DOES still have the tilt&die problem. However it DOES NOT die in the air.
IMO the DL-30 is an outstanding engine. mine runs great(stock configuration).

part 2)
The is a apparently a very skilled Engineer/machinist (goes by 'Cyberwolf') who has engineered a backplate to move the DL-30 carb
from the side of the engine to the rear of the engine. (It should have been put there by DLE!!!) which apparently eliminates the tilt&die
issue from the DL-30, in addition, the engine will idle at a lower rpm. This new backplate has become known as a 'Cyberplate'.

Just to make sure you understand. The tilt&die problem DOES still exist. It IS NOT a problem because it does NOT die in the air.
The cyberplate IS NOT required for excellent performance from a DL-30.

T. Hobbies might sell them but I don't think people will want to pay much attention to what they have to say about parts and service. In another thread it was noted that T. Hobbies stated a 10-32 bolt fit the crank center for a spinner bolt on a DLE 55. That was plain wrong, and could be dangerous for the person that used that information as accurate.

You missed my point completely in the earlier post. It's not that the DLE 30 is not powerful because it is. It's not that the DLE 30 isn't light becuase it is for it's size. it's not that the DLE 30 isn't relatively cheap compared to other engine because it does cost less than others. It's what an engine can do by which it is ultimately judged. An engine is judged by the power it can provide in watts per litre and the DLE 30 is not the strongest, regardless of hp numbers quoted from manufacturer advertising.

The DLE 30 is a good engine with no arguement but lets get to making honest statements instead of unsubstantiated ones. The DLE 30 has the potential to become the best and strongest engine in class but it's not there yet. Until then be satisfied with having plenty of power for the intended purpose in a light package at a good price. Don't go head to head with a well tuned 28i and expect to win the contest though.

Speaking of which, seeing as I ordered a Cyberplate from Richard I figured I should get the engine. So I placed an order for one from my dealer. Oh well, now I guess I am going to need another plane. Dang it never ends does it? Can't think of allot of better ways to spend money though, my wife begs to differ.

I was on the fence on what 30cc engine to get, DL30 or MT35, but I pulled the pin today and took a chance on the new MT35. I will post prop numbers when I recieve the MT and post them. It should be interesting to see which engine is more powerfull. I think the reason many buyers, me included, are concerned with the power and weight of this class of engine is they are on the front line of the glow vs. gass battle. It was only a few years ago when 50cc was on the borderline of gass or glow . In my mind that borderline is now at 30cc with these new light weight engines.

Seagull had some excellent questions that nobody has responded to ! I too would like to know how loud the DLE 30 is with the stock exhaust and any available mufflers that will quiet down the engine. The only muffler that I know of besides the stock muffler is a JTEC. How much quieter is the JTEC compared to the the stock muffler ? Are there any other mufflers out there that will fit the DLE 30 ?
Thanks in advance
Gordon

The dle30 on a stock muffler swinging a 19x8 is quieter than most glow powered aircraft at my club. I rarely go over 1/2 throttle anyway. They usually run around at WOT

My wife gave me a ration one time for buying an airplane, the next week Iwent to the casino, blew $300, came home drunk and tried to accost her. She's warmed up to airplanes some.