RE: DL-50 engine

RE: DL-50 engine
View related threads: (in this forum | in all forums)

Logged in as Guest

Users viewing this topic: paulflys4fun, manuelcasaas

Printable Version

50' Gas fuel tubing
Seller: RC Extreme power
Details: $25.00 | 9/27/2008 | Classified Ad
We will rotate YOUR AD in this spot if you select "Forum Featured" when placing or editing your ad!

All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> Gas Engines >> RE: DL-50 engine

Page: << < prev 86 87 [88] 89 90 91 92 93 94 95 next > >>

Login

Message

<< Older Topic Newer Topic >>

RE: DL-50 engine - 7/22/2008 9:57:13 PM

wavy777

Posts: 275
Joined: 11/1/2004
From: Oxfordshire, UNITED KINGDOM
Status: offline

quote:

ORIGINAL: wavy777

quote:

ORIGINAL: ca$hey

Giday,,,anyone useing a tuned pipe on there DL,,,,im after a good lenght ,,,too start with
thanks

All my (3) DL's are on tuned pipes. Two on KS pipes @720mm from header to baffle and the other on ES composite tuned pipe. GO for the KS, much more durable and not such a 'peaky' response.

Cheers

W

forgot to mention...ES pipe is on a 12" header.

(in reply to wavy777)

Post #: 2176

RE: DL-50 engine - 7/22/2008 11:22:51 PM

maukaonyx

Posts: 156
Joined: 10/7/2006
From: salem, OR, USA
Status: offline

Guys,

I have a DL-50 for my first gasser, a 30% Extra 330L. Still in the assembly stage. THis is a long thread and I tried looking awhile and also tried the Search feature, but did not find an answer to my question...what size tubing (inside diameter) do you use on this engine? Funny how the instructions don't even recommend a size. I know it should be Tygon, but should it be 3/32", 1/8", or 5/32" inside diameter? I see Dubro offers those three sizes of Tygon. Thank you. Jon

(in reply to wavy777)

Post #: 2177

RE: DL-50 engine - 7/22/2008 11:40:17 PM

krproton

Posts: 533
Joined: 8/5/2007
From: Champaign, IL, USA
Status: online

Jon,

I'm using the DuBro Tygon, but I can't say for certain which size it is. I use it from a 50' (or 30'???) spool. I have some at work. I'll look and see what the label says and let you know tomorrow (unless somebody else answers you first).

Part of the problem is the way DuBro labels their tubing. 3' rolls are labeled X Large, 3/32", and 1/8". But the bulk rolls they sell are labeled differently; 50' Medium, 30' Large, and 25' 5/32". So you have six different names for, I assume, three different sizes (unless the 3' lengths are different diameters than the bulk rolls - who knows?).

Now that I think of it, I just use the Large that came on a 30' roll, but I'll confirm that tomorrow for you. Hopefully somebody else can answer for sure what you need to use.

Tim

_____________________________

Tim Lampe
Hobbico R&D

(in reply to maukaonyx)

Post #: 2178

RE: DL-50 engine - 7/23/2008 12:07:39 AM

Bob Pastorello

Posts: 5291
Joined: 2/23/2002
From: El Reno, OK, USA
Status: online

quote:

ORIGINAL: maukaonyx

Guys,

I have a DL-50 for my first gasser, a 30% Extra 330L. Still in the assembly stage. THis is a long thread and I tried looking awhile and also tried the Search feature, but did not find an answer to my question...what size tubing (inside diameter) do you use on this engine? Funny how the instructions don't even recommend a size. I know it should be Tygon, but should it be 3/32", 1/8", or 5/32" inside diameter? I see Dubro offers those three sizes of Tygon. Thank you. Jon

You don't want the 5/32". Too big. Standard 1/8" brass tubing comes with most tanks and the 5/32" wouldn't fit properly. I use the 1/8" on both the DL 50 and the 100; no issues.

_____________________________

Bob Pastorello www.rcaerobats.net
Learn from others...you can't live long enough to make all the mistakes yourself....

(in reply to maukaonyx)

Post #: 2179

RE: DL-50 engine - 7/23/2008 12:22:50 AM

The Big Kahuna

Posts: 74
Joined: 12/10/2002
From: MannumSouth Australia, AUSTRALIA
Status: offline

Howdy wavy777 I had a look at the KS Pipe site. They list a pipe for 45cc and 60cc, which one are you using?

(in reply to wavy777)

Post #: 2180

RE: DL-50 engine - 7/23/2008 12:36:34 AM

digtman

Posts: 34
Joined: 7/27/2005
From: Hoffman est, IL, USA
Status: offline

Hey guys, i was wondering if i could place the ignition battery for my DL50 a few inches behind the rudder servo, it balances the yak perfect. Would there be any interferance with the reciever signal on the 2.4 system?

(in reply to The Big Kahuna)

Post #: 2181

RE: DL-50 engine - 7/23/2008 1:21:19 AM

Bob Pastorello

Posts: 5291
Joined: 2/23/2002
From: El Reno, OK, USA
Status: online

No.

_____________________________

Bob Pastorello www.rcaerobats.net
Learn from others...you can't live long enough to make all the mistakes yourself....

(in reply to digtman)

Post #: 2182

RE: DL-50 engine - 7/23/2008 2:14:57 AM

krproton

Posts: 533
Joined: 8/5/2007
From: Champaign, IL, USA
Status: online

Guys,

when I advance the throttle after extended down lines (when the throttle was at idle) the engine hesitates and sounds like it's going to quit before it "spools up" again. It always sounds like it's going to quit, but never has - just kinda unnerving.

My needles are set so at full-throttle it runs perfectly and at half-throttle or a little below it burbbles/four-strokes (if that has anything to do with it which I don't think it does).

Any suggestions?

_____________________________

Tim Lampe
Hobbico R&D

(in reply to Bob Pastorello)

Post #: 2183

RE: DL-50 engine - 7/23/2008 2:18:02 AM

digtman

Posts: 34
Joined: 7/27/2005
From: Hoffman est, IL, USA
Status: offline

Thanx BOB!!!
with a name like that U must be Italian!!!
me 2 I'm Vito

(in reply to Bob Pastorello)

Post #: 2184

RE: DL-50 engine - 7/23/2008 2:24:45 AM

Bob Pastorello

Posts: 5291
Joined: 2/23/2002
From: El Reno, OK, USA
Status: online

quote:

ORIGINAL: krproton

Guys,

when I advance the throttle after extended down lines (when the throttle was at idle) the engine hesitates and sounds like it's going to quit before it "spools up" again. It always sounds like it's going to quit, but never has - just kinda unnerving.

My needles are set so at full-throttle it runs perfectly and at half-throttle or a little below it burbbles/four-strokes (if that has anything to do with it which I don't think it does).

Any suggestions?

Tim, nearly always a "throttle up" hesitation is too lean a low needle. It is easy to miss the sweet spot, since the low end affects the high, you can be tweaking away and get the high "perfect", but the low is lean.
My "test" is to leave a fully-warmed up engine at it's sitting-still idle....if it gradually speeds up, the low end is lean, if it slows, it's rich. Very much like glow motors.

I try for a solid idle without variation, even if left at idle for 30 seconds or more, then advance (dump) throttle to full immediately. If your low end isn't right, you'll see it RIGHT there.

_____________________________

Bob Pastorello www.rcaerobats.net
Learn from others...you can't live long enough to make all the mistakes yourself....

(in reply to krproton)

Post #: 2185

RE: DL-50 engine - 7/23/2008 3:21:44 AM

krproton

Posts: 533
Joined: 8/5/2007
From: Champaign, IL, USA
Status: online

Thanks Bob,

I'll try that.

After I started my engine today I was making some adjustments in the Tx while my engine was sitting idling for at least two minutes. I didn't notice if the RPM was increasing or not, but it seemed to be running fine, but I'll try your test tomorrow. Interestingly, the idle always seems to increase from where it was when I first start the engine to a higher rpm after the engine has warmed (after a flight). I always have to bring down the throttle trim several clicks to bring down the idle rpm when it's time to come in for a landingthus, indicating it may be a little lean (as you suggested).

_____________________________

Tim Lampe
Hobbico R&D

(in reply to Bob Pastorello)

Post #: 2186

RE: DL-50 engine - 7/23/2008 3:33:41 AM

Bob Pastorello

Posts: 5291
Joined: 2/23/2002
From: El Reno, OK, USA
Status: online

Some of that is normal, but too much creates what you're seeing.
Let us know what you find.

My experience has been that although the overall adjustments aren't critical or touchy, the "sweet spot" of overlap of low to high which gives the best idle and cleanest transition is pretty narrow. Probably less than 1/8 of a turn, total, between the two needles. Think "thin screwdriver blade tip thickness" adjustment increments, the closer you get.

Oh.
Don't forget that if you change your oil ratio, the adjustments you just got "perfect" will require re-tuning because of viscosity difference of flows inside the carb chambers.

_____________________________

Bob Pastorello www.rcaerobats.net
Learn from others...you can't live long enough to make all the mistakes yourself....

(in reply to krproton)

Post #: 2187

RE: DL-50 engine - 7/23/2008 6:06:32 AM

maddog 71

Posts: 115
Joined: 11/20/2006
From: Bath, IL, USA
Status: offline

Hello been reading up on some of this thread really thinking about one of these DL-50 's for my great planes S2c pitts been running a Super tigre 3250 with not much results works really well when its running !!And that is far and few between its been sitting in shop all summer with three flights on it just tired of fighting the engine. So would this engine do me justice the price seems right for my budget. with the 3250 my weight is 15pds I had a christen eagle with a Fuji 50 its weight was 20 pds it flew really heavy in the air and wasnt very comfortable to fly [ like tryin to fly a brick with wings ]!!!! Really dont want to go back to that kinda weight if possible.
Maddog

Attachments

Click to see fullsize image.

Click for fullsize

_____________________________

www.timberlakercclub.com

(in reply to Bob Pastorello)

<

Post #: 2188