RE: DL-50 engine

RE: DL-50 engine
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RE: DL-50 engine - 6/11/2008 9:26:13 PM

wavy777

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

quote:

ORIGINAL: choopi

Wavy777,

Do you get those plane from USA or UK. In my case, I have friends south of the border that I will probably go visit this summer so I should be good. I'm looking at the Wildhare edge 540v2, but the Extreme flight could be an option.

Eric

I get my aircraft from freestyle rc in the UK, as the shipping costs and taxes dont make importing from the USA worth while.

(in reply to choopi)

Post #: 1926

RE: DL-50 engine - 6/11/2008 9:31:12 PM

wavy777

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

quote:

ORIGINAL: drewbags

Wavy777

What tuned pipes are you using and have you ever taken any noise readings on them? I wonder how they compare with a cannister setup; I am using KS cannisters on my DL50s and 100 and they are reasonably quiet, but interested in maybe using a tuned pipe.

Drewbags,
I've never taken noise readings but i'd say they are slightly noisier than cannisters, but still way quuieter than mufflers, both the KS and ES pipes give 400 rpm and 700 rpm respectively over the KS cannisters i had, but definately make the motors 'peakier'. I'm getting more out of the ES pipe that the KS, but the ES pipe doesnt look like its going to last much longer as the carbon fibre looks like its deteriorating. If it was my money again, i'd go with KS. The durability outweighs the slight increase in top end and 'bling' factor. Both tunes pipes are on about 12.5" solid KS header with 25mm drop.

(in reply to drewbags)

Post #: 1927

RE: DL-50 engine - 6/12/2008 2:49:31 AM

paul5992

Posts: 348
Joined: 9/28/2006
From: Red Wing, MN, USA
Status: offline

Choopi, Call Tom at ValleyViewRC maybe he will ship an SD model Yak to you. I have the russian thunder with a DL-50 on it. I love it.

(in reply to choopi)

Post #: 1928

RE: DL-50 engine - 6/12/2008 4:43:36 AM

choopi

Posts: 163
Joined: 4/5/2005
From: Moose Jaw, SK, CANADA
Status: offline

I dealed with Tom in past for props, he's great, will see but I will get something but I will go pick it up myself to save and visit friend at the same time in Min.

Eric

(in reply to paul5992)

Post #: 1929

RE: DL-50 engine - 6/12/2008 6:27:14 AM

aci-bt

Posts: 15
Joined: 4/20/2007
From: Bitola, MACEDONIA
Status: offline

quote:

ORIGINAL: Bob Pastorello

Guys - don't want to start a debate, and I tend to agree.... **** BUT **** whether the "crosshair" is on the "true" thrust line/center or the OFFSET thrust line really, really depends on the brand of ARF manufacturer. I've been bitten by this before.... and "angled" firewall wasn't marked for offset, but someone told me it *was*..... oops.

Usually, the crosshair marks the offset-ed centerline/thrust line, on many airplanes. But worth verifying with the manufacturer, if that is possible. At least that would be my suggestion. It is a PAIN to have to relocate "one hole width" on these engine firewalls.

So why are they putting this cross???

(in reply to Bob Pastorello)

Post #: 1930

RE: DL-50 engine - 6/12/2008 10:55:02 AM

drewbags

Posts: 201
Joined: 1/27/2005
From: NorwichNorfolk, UNITED KINGDOM
Status: online

Thanks for the info, interesting to hear about the durability of the composites adn performance differences.

(in reply to wavy777)

Post #: 1931

RE: DL-50 engine - 6/14/2008 2:16:36 AM

craigteffe

Posts: 481
Joined: 2/7/2003
From: Maryville, TN, USA
Status: offline

So, now that this engine has been out for about 2 years has anyone had any failures with the engines that you have purchased or know of anyone with any?

I will start it off with a friend of mine having a engine lock up on him about 6 to 9 months into his engine, Bob a DL USA took care of him and repaired the engine.

I only ask to see what the issues have been and how they were resolved, I like to to know all about a product that i own. I currently own 2 DL 50's and have had no real problems as of yet with the exception of the old mufflers cracking. One engine i have had for about 1.5 years and the other about 1 year.

I am happy so far.

_____________________________

Craig

(in reply to drewbags)

Post #: 1932

RE: DL-50 engine - 6/17/2008 11:53:19 PM

BOUND_4_HELL

Posts: 136
Joined: 10/21/2005
From: Mississauga, ON, CANADA
Status: offline

My Next Crash Victim

I started building my next crash waiting to happen, an RCGuys.com 1/3 Pitts Special, with a 50 DL engine. This is my first 50 CC engine, so far everything is cool the installation was easy enough, I will post some RPM reading once I get a couple of gallons through it. Should be able to maiden it by the weekend if the weather co-operates.

We had our Fun Fly this past weekend in Sudbury and lost only one plane, poor Ed did not check his C of G before his maiden flight and he could not control it, it ended up in the bush, and so far we have not found it. The weather was better than expected and everyone had a blast including all the kids, as we had some candy drops from a Piper Cub that was loaded down with goodies and almost did not get off the ground.

Here are some photos of my progress on the new project with the DL 50.

Happy Flying
Bound_4_Hell

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(in reply to craigteffe)

Post #: 1933

RE: DL-50 engine - 6/18/2008 4:04:28 AM

eugene

Posts: 572
Joined: 6/5/2002
From: Indiana| USA, IN, USA
Status: offline

Same set up I have.....Flew it just last week......really rips with the DL-50. Try some CG movements....it was running out of elevator on landings, seemed a tad nose heavy and was dropping a little hard.... With a 22-8 XOAR, it will do more tricks than a monkey on 20' of grapevine....

(in reply to BOUND_4_HELL)

Post #: 1934

RE: DL-50 engine - 6/18/2008 10:35:51 PM

BOUND_4_HELL

Posts: 136
Joined: 10/21/2005
From: Mississauga, ON, CANADA
Status: offline

Hi Eugene,

Thanks for the tip, I usually go easy on the elevator throws, as I do not want the plane to snap when doing tight loops or when I panic and give full up elevator on the sticks.

Did you set your elevator throw to the manual recommendation ??

My Pitts with the DL 50 came out to 15.5 lbs, dry >> no smoke system, seems kind of heavy, not sure why?? The DL 50 weighs about as most 40cc. The DL 50 weighs 4 oz less than my Fuji 43 EI.

Once I install the smoke system and fill her up with oil and gas I figure it will weigh 18.5 lbs. I will install a 20oz gas tank and a 20oz smoke oil tank. 18.5 lbs is really heavy but with 1600 sq inches of wing area it will still be 28 oz /sq ft, so I guess it will be OK.

What does your Pitts weigh dry ??

I can never make my planes weigh the same as the published weight; the manual says that the Pitts should weigh 12 to 14 lbs depending on the engine you choose. I'm not sure where they came up with those figures, as I'm a pound and 1/2 over that. Maybe they do not take the batteries, prop and spinner into consideration ??

Thanks
Geppino

(in reply to eugene)

Post #: 1935

RE: DL-50 engine - 6/19/2008 1:28:50 AM

eugene

Posts: 572
Joined: 6/5/2002
From: Indiana| USA, IN, USA
Status: offline

Weight is a tad over 15# ( 12-14 must be powered with rubber bands)
I balanced it 5 3/4 " behind top LE.. Other bipes I've had balanced at the LE of the lower wing...
I use a 20oz tank, good for 12 min. flying time...

My point was, when landing, low and slow, it seems to run out of pitch control just before touch down..drops and bounces....

I'm going to tinker with the C/G, as the wing area should give it plenty of support a low speeds..moving the weight further back will make the pitch control more effective.. Bipes can be fun, but do take more attention to trimming..

15# is really no problem for the DL50. does knife edge loops with ease... I've used two props...a XOAR 22-8, and a Menz 20-12.
Either did a good job, the Menz pulled it a little faster.....if your're going into the 17-18# area, I would recommend the 22-8, this engine is pretty tough for it's size.......

(in reply to BOUND_4_HELL)

Post #: 1936

RE: DL-50 engine - 6/19/2008 2:30:57 AM

BOUND_4_HELL

Posts: 136
Joined: 10/21/2005
From: Mississauga, ON, CANADA
Status: offline

Thanks Eugene,

I love bi-panes I currently own a Supers Skybolt and a Goldberg Ultimate 300, and I flew a PT-17 all last summer before a tree jumped out in front of it on final approach. It was by far the best flier to date and the most fun I had at the field, took out the Stearman every time I went.

I bought a Xoar 22x8 White Sword and a Xoar 22x10 JPE Prop to try out. I will break in the DL 50 with the 22x8 and then try the 22x10 to see which flies better

The DL 50 is thirsty, I’m clad I decided on the 20oz tank instead of a 16.

The manual puts the C/G at 5 to 6 ½ inches back, would you recommend I start with 6 inches, so I do not run out of elevator??

Thanks

Bound_4_Hell
You can never have enough power, as you can always throttle back.

< Message edited by BOUND_4_HELL -- 6/19/2008 3:04:57 AM >

(in reply to eugene)

Post #: 1937

RE: DL-50 engine - 6/19/2008 2:57:26 AM

eugene

Posts: 572
Joined: 6/5/2002
From: Indiana| USA, IN, USA
Status: offline

I would say, six inches would be a good place to start....As you can see from the instructions they give a WIDE latitude on the CG.. All planes fly a little different, so just give it a try..
In the past I had a GP Super SkyBolt, a Bucker Youngman, Smith Mini-plane, and an Aeromaster that I kit bashed....Of course, these were all 60-120 size planes..
With the 18# weight, the 10 pitch 22 would be pushing the envelope, but there again it may fit your style of flying....

(in reply to BOUND_4_HELL)