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RE: NEW DLE 20cc Gasser! (Data & Links 1st Post) - 8/8/2011 2:27 AM   
bob418


 

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Status: offline 		I use the Syssq SAP Ultra BEC  with my DLE 20cc  and use his tach as well, works great!!!! 


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RE: NEW DLE 20cc Gasser! (Data & Links 1st Post) - 8/8/2011 7:15 AM   
TimBle


 

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quote:

ORIGINAL: ahicks

quote:

ORIGINAL: TimBle


quote:

ORIGINAL: iflywhenican

''IF someone has that much experience and still breaks loads of props......why is that?''

In any thread that gets' started, there seems to be someone that tends to get ''tunnel vision.''
You don't necessarily have to make a bad landing to break a prop is what I am getting at here. You can have a backfire or other situation to cause your starter to jump and hit your Xoar...or whatever and guess what happens??? You might can use what is left of the splinters to start a campfire or stir paint with. With an APC you can easily get away with it and keep on going and enjoy your day whereas with the wood props...it may send you back home with no stick time at all.
JMO




Hmmmm, no I don't think so. damaged quite a few APC's and they're pretty much paint stirers if they hit the ground. No different to a wooden prop.

If someone wants to use APC, hey go ahead it a free world (mostly). However an APC is not more durable than a wooden prop. They have their place especially among the pattern guys but I much prefer the XOAR / JXF's for performance and live with the fragility. Everything comes at a cost.


Was out flying, beating on actually, my DLE powered profile. I generally clean my prop as part of putting the plane away, but yesterday we shut down due to a rainstorm so I just tossed it in the back of the car. So I have a day's worth of abuse showing on the prop tips for evidence of what they'll take. I've never seen a wood prop stained like this, but maybe you wood prop fans have some pic's as well? This is a 17x6W, should have placed a tape measure next to the stains to get some perspective, but the stains easily cover the last inch or more of the tip, but you can see the leading edge is stained up much further than that...

Edit: Hey, forgot to mention the copper 90 on the muffler. Note it's been installed as close as possible to the can, and the piece that was cut off to do that has been added below the 90. This drops the exhaust down quite a bit - no longer on the leading edge of the wing!






clearly it did not hit a concrete runway....



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RE: NEW DLE 20cc Gasser! (Data & Links 1st Post) - 8/8/2011 7:32 AM   
Ernie Misner



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Status: offline 		ahicks, what kind of a profile is that..... the Yak that Valley View RC sells? What other profiles are folks using, like the OMP Fusion perhaps? Great idea with the copper 90 degree bend. How did you fasten it on??

Thanks,

Ernie

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RE: NEW DLE 20cc Gasser! (Data & Links 1st Post) - 8/8/2011 9:17 AM   
a1pcfixer



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ORIGINAL: Ernie Misner

..........................What other profiles are folks using, like the OMP Fusion perhaps? Great idea with the copper 90 degree bend. How did you fasten it on??

Thanks,

Ernie


Yep, the OMP Fusion, the VVRC Yak, and the AW PROX260EXTRA "FreeStyle" (.90 size) seem to be the more popular choices for a DLE20 gas.
The AW PROX is a pound lighter RTF than the VVRC. Not certain about the Fusion's AUW.

I first posted about using a 90 degree copper elbow back on 10/25/2010 in the AW Support section;
http://www.rcuniverse.com/forum/fb.asp?m=10093869

You'll need to sand the outside of the exhaust pipe & the inside of the copper elbow in order to get one on. They fit VERY tightly!

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RE: NEW DLE 20cc Gasser! (Data & Links 1st Post) - 8/8/2011 12:05 PM   
ghoffman


 

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Status: offline 		I have an OMP Razor Yak, brand new in the box that I am never going to use, and will let it go for $150 (with shipping) to the lower 48.  It would be great with the DLE-20.  I have a big (104 inch) Aj Slick coming and I need 10 7955 servos!  

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RE: NEW DLE 20cc Gasser! (Data & Links 1st Post) - 8/8/2011 12:52 PM   
ahicks


 

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Status: offline 		No, the prop didn't hit concrete, but I think it's very clearly survived well beyond what a wood prop might have when flying off grass? That's the only point I'm trying to get across.

The plane is a 67" OMP Fusion. It's fun to fly, has a very wide speed envelope. With the 6" pitch prop you're able to fly wide open (on the level) without fear of blowing a control surface off. I've been beyond that a bit but not encouraging anyone else to try that. The plane has proven itself to be very durable as well!

Jim, I took your idea a step further, moving the elbow as close to the can as possible, then extending the exhaust further down. The thought was to move the bulk of that fitting in closer where it's weight is less likely to cause fatigue issues. The idea of using the cut off as an extension really hadn't occured to me yet, but that made the move even more worthwhile. I left the fit pretty snug and used red loctite to hold it in place. The 2 small screws are just insurance. Even the way this thing sips fuel (I use a 6oz tank), it's over a gallon now and holding without incident.

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RE: NEW DLE 20cc Gasser! (Data & Links 1st Post) - 8/8/2011 3:15 PM   
tlroliff


 

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Status: offline 		Anyone flying a Great Planes P-6E Hawk on the DLE-20? It's a 76" scale bibe in the 12-15 pound range. Mfg. calls it a 90-1.20 size. I am flying mine on a Saito 1.50 w/16x8 prop and it is fine, very scale but by no means over powered. Wondering if this would be enough engine.

Thanks

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RE: NEW DLE 20cc Gasser! (Data & Links 1st Post) - 8/8/2011 3:29 PM   
spitfire66


 

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Status: offline 		I recentliy installed a dle 20 on my hangar 9 spit. I had to cut up the cowling to get the stock muffler to fit a little more than I would like, but I was pinching pennies. I am currently using the old cowling so there is a hole left from the previous engine muffler exit. I figured I would fly the plane for a while before buying a new cowl and pitts muffler. I had to rig up a manual choke as my radio is out of channels. I would recommend turning the carb around as some of you have done. This gives you more room as not to run into the cylinder head when setting up your linkage. You can follow my experience in the H9 Spitfire build if you are interested. I have a busy week, but will post data when I have time to actuallly run the engine. I will be running a 15x7x3 master airscrew.

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RE: NEW DLE 20cc Gasser! (Data & Links 1st Post) - 8/8/2011 4:19 PM   
SpinnerRow



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ORIGINAL: spitfire66
I would recommend turning the carb around as some of you have done. This gives you more room as not to run into the cylinder head when setting up your linkage.

It also puts the carb needle valves on the bottom requiring you to turn the plane over to adjust them. That would be a PIA.

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RE: NEW DLE 20cc Gasser! (Data & Links 1st Post) - 8/8/2011 4:25 PM   
SpinnerRow



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quote:

ORIGINAL: tlroliff

Anyone flying a Great Planes P-6E Hawk on the DLE-20? It's a 76'' scale bibe in the 12-15 pound range. Mfg. calls it a 90-1.20 size. I am flying mine on a Saito 1.50 w/16x8 prop and it is fine, very scale but by no means over powered. Wondering if this would be enough engine.

Thanks

I'm flying a 72" PT-17 biplane that weighs in the 12lb range and it flies it well. For a scale take off, about 1/3 throttle is all you need.

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RE: NEW DLE 20cc Gasser! (Data & Links 1st Post) - 8/8/2011 4:36 PM   
tlroliff


 

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quote:

ORIGINAL: SpinnerRow


quote:

ORIGINAL: tlroliff

Anyone flying a Great Planes P-6E Hawk on the DLE-20? It's a 76'' scale bibe in the 12-15 pound range. Mfg. calls it a 90-1.20 size. I am flying mine on a Saito 1.50 w/16x8 prop and it is fine, very scale but by no means over powered. Wondering if this would be enough engine.

Thanks

I'm flying a 72'' PT-17 biplane that weighs in the 12lb range and it flies it well. For a scale take off, about 1/3 throttle is all you need.

Thanks, that's encouraging news! Sure would love to get away from $29/gallon glow fuel!

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RE: NEW DLE 20cc Gasser! (Data & Links 1st Post) - 8/8/2011 5:14 PM   
SpinnerRow



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ORIGINAL: tlroliff
Thanks, that's encouraging news! Sure would love to get away from $29/gallon glow fuel!

After a flight yesterday a fellow club member said "I kept waiting for something to come off of the plane on those high speed passes". I'm flying it with a Vess 17x6 prop and that is about the best prop for this motor. I've tried a couple of handfuls of different props and this one came out as the best. It is a really great engine for this plane. I'm using a Jtech standard Pitts muffler and a single LiFe battery for receiver and ignition with a diode to drop the voltage for the ignition. I'm using an RCEXL opto kill on the engine as well. Seems to work great. I've been flying a similar combo on a P-51 for about six months now.

And yea, $3.70 a gallon for fuel is much better than feeding a Saito 1.25 at $29 a gallon.

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RE: NEW DLE 20cc Gasser! (Data & Links 1st Post) - 8/8/2011 5:23 PM   
TimBle


 

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Status: online 		what capacity battery are you using.


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RE: NEW DLE 20cc Gasser! (Data & Links 1st Post) - 8/8/2011 5:36 PM   
Bpar4


 

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Status: online 		Using this engine with a Tech-Aero (output to 5.1v) on my Arrestti, usage averages ~175mah per 10min flight + or - depending on the type of flight.  Have a Hobbico LiFe 1600mah.  This battery is not very heavy. Bob

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RE: NEW DLE 20cc Gasser! (Data & Links 1st Post) - 8/8/2011 6:35 PM   
SpinnerRow



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ORIGINAL: TimBle

what capacity battery are you using.


42% Nano Fusion 6.6v 2600mAh that I got from Valley View RC. I'm using about 200mah on a 12 minute flight in the Stearman with digital metal gear Power HD DS090M servos all the way around. I wasn't just putting around. I was doing aerobatics (rolls, loops, hammerheads, tail slides, WOT vertical climbs, snap rolls, spins). You know.. The usual barnstorming stuff! I flew five times yesterday and put back just under 1100mah.



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RE: NEW DLE 20cc Gasser! (Data & Links 1st Post) - 8/8/2011 7:18 PM   
vertical grimmace



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Status: offline 		I have a question about tuning. Once in a while, and I mean like every other flight maybe, I get a hickup or burble at full throttle or close to it. Is this a Rich condition or am I lean? Still trying to learn how to prefectly tune some of these gassers. It runs perfectly otherwise. I am using a 16-8 xoar. 32-1 Bel Ray oil.

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RE: NEW DLE 20cc Gasser! (Data & Links 1st Post) - 8/8/2011 7:22 PM   
SpinnerRow



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Status: offline 		Could be either/or. Use an NGK plug and gap it at .024" and see if that helps. This engine doesn't like the stock plug or the manufacturer's recommended gap.

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RE: NEW DLE 20cc Gasser! (Data & Links 1st Post) - 8/8/2011 7:47 PM   
a1pcfixer



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ORIGINAL: ahicks

..............................................

Jim, I took your idea a step further, moving the elbow as close to the can as possible, then extending the exhaust further down. The thought was to move the bulk of that fitting in closer where it's weight is less likely to cause fatigue issues. The idea of using the cut off as an extension really hadn't occured to me yet, but that made the move even more worthwhile. I left the fit pretty snug and used red loctite to hold it in place. The 2 small screws are just insurance. Even the way this thing sips fuel (I use a 6oz tank), it's over a gallon now and holding without incident.


Doubtful that you'd have any stress/fatigue issues....it's really very light. Like the screws idea though.
Mine fits so tight I need to tap it on with a piece of wood and a hammer!

THIS is what I'd like to use, canister & header;



.

Full story is here;
Goose's Aeroworks ProX260 build thread
http://www.rcuniverse.com/forum/m_10609304/tm.htm

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RE: NEW DLE 20cc Gasser! (Data & Links 1st Post) - 8/8/2011 8:04 PM   
a1pcfixer



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Status: offline 		vertical,

+1 on ditching the stock DLE/3 plug.
Get an NGK/CM-6 plug!

Another possibility might be your ign battery.
Jody' made note that some DLE20/30's recently have shown a dislike for anything of 6.0 volt or above.

Also, if you're running a seperate battery for your ign, it could be dropping a bit low in use and
a low voltage or dying battery can show up as eng miss firing. Have you checked it right after that's occurred?
As in a load test and what was the voltage at that time? (you want 4.8 - 6.0 volts to the ign)

A Main Hobbies has testers;
Hangar 9 Digital Variable Load Voltmeter
http://preview.tinyurl.com/3fenszg

FUTBR2000 FUTABA BR-2000 BATT CHECKER/DISCHG
http://www.gravesrc.com/FUTBR2000_FUTABA_BR_2000_BATT_CHECKER_DISCHG_p/futbr2000.htm

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RE: NEW DLE 20cc Gasser! (Data & Links 1st Post) - 8/8/2011 8:19 PM   
bob418


 

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ORIGINAL: tlroliff

Anyone flying a Great Planes P-6E Hawk on the DLE-20? It's a 76" scale bibe in the 12-15 pound range. Mfg. calls it a 90-1.20 size. I am flying mine on a Saito 1.50 w/16x8 prop and it is fine, very scale but by no means over powered. Wondering if this would be enough engine.

Thanks



I am using a DLE 20 on my stick built 1930 Fleet Bipe and it flys great (comes in about 10.4 lbs dry)  72 inch wing spans  she flies great scale and has the power to do anything I aske of her!!


Also I  have had just over 1/2 gallons of gas through the engine (over day days of flying) and she is flying great - the key was gapping my plug at .024!  runs like a champ!!!

I have a 2nd DLE 20 in the shop and was thinking of getting a P-6E hawk to put it in!!  Just saw one fly at a local event, nice bird!!

Bob

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RE: NEW DLE 20cc Gasser! (Data & Links 1st Post) - 8/8/2011 8:31 PM   
MetallicaJunkie



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Status: offline 		i really like the h9 volt meter, it has a 500mah load which i like for glow plane batteries(nimh) and 1-2 amp loads for the bigger gasser batteries(Li Ion/lipo/lifes)

but ill have to make do with my hobbico version, no need to spend 40 bucks on something i can make do with....

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RE: NEW DLE 20cc Gasser! (Data & Links 1st Post) - 8/8/2011 8:47 PM   
MetallicaJunkie



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quote:

ORIGINAL: bob418


quote:

ORIGINAL: tlroliff

Anyone flying a Great Planes P-6E Hawk on the DLE-20? It's a 76'' scale bibe in the 12-15 pound range. Mfg. calls it a 90-1.20 size. I am flying mine on a Saito 1.50 w/16x8 prop and it is fine, very scale but by no means over powered. Wondering if this would be enough engine.

Thanks


a DLE20 is very close to a saito 150 or 1.20ax, and not a slimer either ... they all do pretty well with 15-17" props

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RE: NEW DLE 20cc Gasser! (Data & Links 1st Post) - 8/8/2011 8:53 PM   
SpinnerRow



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ORIGINAL: MetallicaJunkie

i really like the h9 volt meter, it has a 500mah load which i like for glow plane batteries(nimh) and 1-2 amp loads for the bigger gasser batteries(Li Ion/lipo/lifes)

but ill have to make do with my hobbico version, no need to spend 40 bucks on something i can make do with....

Or do like I did. Buy a cheap digital volt meter from Harbor Freight for $4.99 and add a button with three 1/2watt resistors to make a 500mah load. The resistors were 9 cents each and the momentary push button was 49 cents at a local surplus electronics store.

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RE: NEW DLE 20cc Gasser! (Data & Links 1st Post) - 8/8/2011 9:06 PM   
vertical grimmace



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Status: offline 		Well, I have the CM6 plugs, and I am runnining 4.8 volt Eneloop pack. My ignition under load is around 5.2 volts.

I am positive this is a tuning issue. It could be the gap, I will check that. I have heard the float can load up and this is a symptom of it clearing itself out. Although I did find it did it after an extended vertical. Almost like it had heated up and went lean like a glow engine.

Which brings me to another question, What is the coolest throttle setting for a gas engine? I know glow like to run wide open. The flow of fuel helping to cool it off. Would a gas engines coolest running be at idle?

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RE: NEW DLE 20cc Gasser! (Data & Links 1st Post) - 8/8/2011 9:19 PM   
SpinnerRow



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ORIGINAL: vertical grimmace
Which brings me to another question, What is the coolest throttle setting for a gas engine? I know glow like to run wide open. The flow of fuel helping to cool it off. Would a gas engines coolest running be at idle?

Idle with a 60mph head wind???

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