<div style="BORDER-BOTTOM: medium none; TEXT-ALIGN: left; BORDER-LEFT: medium none; BACKGROUND-COLOR: transparent; COLOR: #000000; OVERFLOW: hidden; BORDER-TOP: medium none; BORDER-RIGHT: medium none; TEXT-DECORATION: none">I have a rear intake DLE 30 on my Pilot 73" Yak 54 at about 11 lbs + fuel and it wil hover at about 1/3 throttle ( actually more like 1/4 as I have set a throttle curve) using a Zoar 19 x 3D A prop.  It will easily climb out of the hover given more throttle, actually it will keep climbing till it's a speck.

I am using a CRRC pitts type muffler to keep the noise down so if you use the stock ( yet noisey) muffler you will have a little more power.

The 3 DA prop has a little more punch at this throttle setting than the Zoar 19x8 but both will be good for learning 3D with your DLE 30



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I tested the DLE30 again last week with the cyberplate rear conversion and a Vess 19A and am getting 15lb of thrust +/- 2 oz. On my 12lb. Edge 540 it pulls out of a hover and accelerates at a descent pace. Pulling 12lb. Straight up is really no easy task if you think about it. It’s no rocket out of a hover, but good.. I have nice steady harriers, beautiful flat spins, hovers at a strong 1/3 throttle all day. It does the best ssssslllllllllooooooowwwwwww knife edge harriers I have seen (huge rudder surface). Good luck with your’s, I know I love both of mine. I have a side carb. on a Yak that I am putting the new rear conversion from Valley View on next week. Will get some thrust numbers on that when it is done.

which edge 540??

My DLE show 17 to 18 lbs of thrust with a digital scale with a xoar 19X8

Regarding 3D prop size, I'm a first season 3D rookie, so still a ton to learn. Flying a 10.5lb Funtana 125 w/26cc RCGF/Aerovate, so you DLE guys have even more power than I do. I think the 8" or 10" pitch props are both going to fly the 3D planes OK, but wondering why you might want the kind of top end speeds produced with that kind of pitch on a 3D plane? I think you might be further ahead letting the engine rev up a little with a 6" pitch prop? I think the 6" will be much kinder regarding flutter on the over-sized 3D control surfaces by limiting top end speed (though still a big concern!), will increase available thrust (ability to accelerate out of a hover or while vertical), and the thing will stop on a dime when throttled down (depending on CG). FWIW

In 3d you want the largest diameter, lowest pitch prop the engine will effectively handle for this type of flying. So 6 and 8 pitch props will be good starting points. Those that don't mind experimenting might find even lower pitches beneficial if they can find props in larger diameters.

Oversize control surfaces and flutter are not really an issue when the controls are installed correctly using servos sized accordingly. Typically flutter occurs when some part of the installation was defective, like undersize control rods and linkage, weak servos, bad hinging, ultra wide hinge gaps, etc. As planes become larger and have larger sufaces the need for sealing hinge gaps becomes more and more important to assist preventing flutter. A side benefit is more precise and predictable contols.

It is a PeakModel 26cc Edge. I got it because it was cheap and had the Red Bull scheme, which was cool. After I worked in a little Rudder to Elevator mix and a Rudder to Aileron mix the thing fly's super. Started with an RCGF 26 and switched to DLE 30 last month.....almost like flying a new plane!!

T.O.M., agreed on the control surfaces, but only after a couple seasons worth of hard learned lessons.

It looks to me like the directions for the size planes these smaller (but still very powerfull) gas engines are run in haven't quite caught up with the requirements the gas engines impose on the airframes. Unfortunately, rookies like me are following them assuming they'll work. From what I've read over and over again here on RCU, as well as experiences gained the hard way, there have been MANY maiden flight/early test flight disasters because of a lack of good information in the directions regarding (or maybe emphasis placed on)the issues you mention above? Like: At what point is the kit hardware not sufficient? Exactly how heavy is "heavy enough" - for my application? What does "right" look like?

My thought earlier was the 8-10" pitch props wouldn't help this (lack of good directions) issue one bit. The faster speeds generated by them only increase the potential for flutter, and they aren't all that desirable a prop for 3D anyway.

Also, and maybe much closer to being on point, ground clearance issues may start popping up (using the standard gear) when you get into the 18, 19, and 20" props. Just a heads up if that thought hasn't registered yet... FWIW

thanks will check into it.

Just wanted to say thank you for the tip.

I had a 20x6 that I got from Tower H at around $14+ and it was Maple wood made in Italy. I broke the darn tip on a rather nasty Midwest Giles 202 landing short of the field. Man that was a nice prop! Capt,n

Happens every time like that, don't it? A nasty grass stained, out of balance prop with so-so performance probably would have easily survived that landing - and many more like it! But not that favorite prop. Not a chance!

You bring up some very good points.

The first thing I'll say is the moment you switch from glow to gas, 2-56 hardware became a thing of the past. 4-40 minimum on everything. The nyrod control rods aren't really functional anymore because of the inherent flex they provide. You must have rigid and stong control linkage. Slop free connections are another critical item. Flutter can develop if horn/linkage connections permit a lot of free movement. Using a couple of 2-56 screws to attach horns to surfaces generally needs to be changed to a diferent fastener. The bolt on horn might be ok, but sheet metal screw fasteners come out pretty quick. No easy connectors on gas planes. Anywhere, ever.

Floppy and weak flight surfaces are no longer tolerable. Not because of flight loading but because the combustion shock pulses from the engine combines with weak surfaces and hinging and breaks things. On a personal level I don't think CA hinges should be used on gas engine aircraft but many manage to do just fine.

Prop clearance can be dealt with as long as there are no personal concerns with adding a shim plate under the landing gear to raise the height, or replacing stock gear with after market stuff that is longer and stronger than stock. Since gas engines often add weight to the nose, stronger gear could be desirable anyway.

I have a question.

I have converted my DLE 30 side carb to rear carb, and have it running just the way I want it.

The question I have is this. Will I have to readjust  the carb again  when I revert back to the side carb if or when I do that?

YES

It may need some slight tweaking?

Good advice T.O.M. I was always told metal geared servos also. Is that true?

Thanks Guys
Billhass

TKG installed one of the Bowman rings in the DL 30 that is out test stand at this time.Right away compression felt better and getting better the more we run it.
Saw a 100 RPM gain on the first run .It is still set a little rich on top.
The ring we took out looked like crap under a mag glass.I am flying one 30 that has pretty poor compression not much time on this one.I will try a Bowman ring in it after surgery. Going to order some more FB rings. Sen't yours today.
BCCHI

<hr />BCCHI....WOW....that is exactly what I wanted to hear. Man I cannot wait to get that hard crude ring out of my DLE and treat that cylinder to a good Bowman ring. Keep us updated on the running!!!!!! WA HOOOooo Lets race that other 30cc on the market...same plane...same weight!!!! Capt,n

Metal is better, but set up correctly nylon gears work out rather well. Karbonite stuff works until the planes get larger. Wasn't that long ago the best we had for giants was the 8411 nylon geared servo. I still use 4721's on throttles. But they are not the lowest priced servo. Very good quality.

w8ye a little off note I see you on the NASA Plum Brook list I was out there Thursday needs some work to get it back in shape but not bad for being locked out for 2 years. Hope to see you there.

That flying site looked nice in those pictures didn't it? Those guys have been coming to Shelby and Willard for a while. I personally have not been to the Plumbrooke site except to teh front gate. -Jim

Oh Jedi master.....PM sent

So is the stock ring that comes in the DLE 30 wearing out to quickly, to soft, Why does it look so bad under a mag glass??

I am asking this becouse I was thinking about buying one.

Thanks