Remote Needle Valve / Magnum XLS .15  
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Remote Needle Valve / Magnum XLS .15 - 8/6/2007 11:25:03 PM   
Tbone4life



Posts: 138
Joined: 2/17/2006
From: pearland, TX, USA
Status: offline 		Anyone converted their XLS .15 to a remote needle valve, the original is pretty close to the prop

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Club Saito #540
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RE: Remote Needle Valve / Magnum XLS .15 - 8/7/2007 4:06:05 AM   
glowplugboy


 

Posts: 580
Joined: 12/26/2001
From: Pasadena, TX 77505/77508, TX, USA
Status: offline 		T-bone, the best thing to do is leave it there and do all NV adjusting pre-Margerita ingestion. Fingers and finger nails stay in tact fine....
Glowplugboy

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RE: Remote Needle Valve / Magnum XLS .15 - 8/7/2007 4:54:12 AM   
Tbone4life



Posts: 138
Joined: 2/17/2006
From: pearland, TX, USA
Status: offline 		I did, I cant find the same size and thread that the needle is (like Tony said before). I just left it like it is. It dont look so bad once I mounted it on the bat and put a prop on it. I think its gonna prob break during a mid air or lawn dart landing.
We'll see , I'll have it ready sunday.

Laters... Tbone

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Club Saito #540

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RE: Remote Needle Valve / Magnum XLS .15 - 8/7/2007 4:55:32 AM   
Tbone4life



Posts: 138
Joined: 2/17/2006
From: pearland, TX, USA
Status: offline 		I'm a Burbon kinda guy anyways

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Club Saito #540

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RE: Remote Needle Valve / Magnum XLS .15 - 8/7/2007 2:16:34 PM   
Montague



Posts: 4630
Joined: 4/19/2002
From: Laurel, MD,
Status: offline 		I've been smashing the Mag .15s in to things for years. I've never broken off a needle valve, but it's pretty common to have the carb rock back and break out the front of the crankcase, where the carb mounts. You can fix this with JB weld. You can also reduce the chances of it happening by adding a fillet of JB weld around the carb mount area in advance, and rotate the carb, moving the needle back, until the carb touches the crankcase, then it's braced and can't move back as much or as easily. Works for me.


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Kirk Montague Adams
RCCA 560

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RE: Remote Needle Valve / Magnum XLS .15 - 8/7/2007 3:27:50 PM   
rrh


 

Posts: 322
Joined: 11/16/2002
From: Colorado Springs, CO, USA
Status: offline 		I saw a RNV set up this weekend at our Mile Hi contest on one of Buttercup's rigs. How'd you do it, Bob?

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Randy Hodges
RCCA 745

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RE: Remote Needle Valve / Magnum XLS .15 - 8/7/2007 4:26:43 PM   
Tbone4life



Posts: 138
Joined: 2/17/2006
From: pearland, TX, USA
Status: offline 		I'm pretty sure Carlos broke his needle valve on his XLS in a mid air or lawn dart landing a month or two ago? Thats when Tony and I were talking about plugging the needle valve threads and adding a remote needle valve. I figured the threads were like 1/4 by 20 or 28 fine threads, but there not!

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Club Saito #540

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RE: Remote Needle Valve / Magnum XLS .15 - 8/7/2007 4:38:15 PM   
Montague



Posts: 4630
Joined: 4/19/2002
From: Laurel, MD,
Status: offline 		Oh, I forgot, if you really want a remote, you can probably get a cap that fits from Global Hobbies. I haven't tried it, but Magnum is pretty good about parts fitting between engine sizes. So, you can probably unscrew the needle seat from the carb, screw on a cap, and then screw the needle assembly in to a remote mount.

I think the part you want is the last part on this page:
http://www.hobbypeople.net/part/210627.asp

The carb plug. It says 32-91, but it IS the same part on the .25 and .28, and the .15 looks the same, but I've never tried it, so you're on your own there.

The parts index is here:
http://www.hobbypeople.net/part/partsndx.asp

and you can find the Mag .15 and all it's parts.

Another option (and one that I think some guys are doing) is to cut the needle off the Mag needle and then screw the needle valve all the way in. This turns it in to a plug. Then use an OS remote needle from the .15LA. The OS needles are finer than the Magnum ones. Though the new Mag .15XLS has a much finer needle with broader adjustment. But I don't know if any of the parts are interchangeable there, the carb is a totally new design.


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Kirk Montague Adams
RCCA 560

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RE: Remote Needle Valve / Magnum XLS .15 - 8/7/2007 4:59:47 PM   
Montague



Posts: 4630
Joined: 4/19/2002
From: Laurel, MD,
Status: offline 		Ah, the threads are almost certainly metric. It is a chinese engine, after all.


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Kirk Montague Adams
RCCA 560

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RE: Remote Needle Valve / Magnum XLS .15 - 8/7/2007 7:23:21 PM   
Tbone4life



Posts: 138
Joined: 2/17/2006
From: pearland, TX, USA
Status: offline 		How do you guys go about breaking this engine in?

Is a towerpower glow plug Ok to run in this engine?
http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXJA89&P=0

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Club Saito #540

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RE: Remote Needle Valve / Magnum XLS .15 - 8/7/2007 8:01:31 PM   
Alex Treneff



Posts: 142
Joined: 2/25/2006
From: Jackson, TN, USA
Status: offline 		Generally the best way to break an engine in is to set it a couple of clicks rich and launch it. Put it under a realistic flight load and let the air keep it cool. Oughta work with this one if it works with anything else!

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Alex Treneff
TreneffRC - Team Battle Axe

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RE: Remote Needle Valve / Magnum XLS .15 - 8/7/2007 8:39:20 PM   
Montague



Posts: 4630
Joined: 4/19/2002
From: Laurel, MD,
Status: offline 		I break in my Mag .15's using the heat cycle method. I use a MAS 7x4 prop as well.

Now, do you have the new Mag with the blue head, or the old Mag? The old one didn't like turning at low rpm with the 8x3 prop, so using the 7x4 allowed the piston/liner to get to the right temp quickly, while still allowing enough oil for the conrod. That's the key.

The problem with just setting the needle rich is that you wear out the piston/conrod fit sooner than you have to. Running the engine in a way that causes the piston and liner to not heat up to normal temp causes them to wear. Then when you do try to get max rpm, it's not there.

On the new Mags, they turn the 8x3 prop just fine, so I don't think it's going to be a big deal, but I still did mine with the 7x4 to let the engine rev with out putting strain on it.


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Kirk Montague Adams
RCCA 560

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RE: Remote Needle Valve / Magnum XLS .15 - 8/8/2007 12:14:47 AM   
glowplugboy


 

Posts: 580
Joined: 12/26/2001
From: Pasadena, TX 77505/77508, TX, USA
Status: offline
quote:

ORIGINAL: Montague

I've been smashing the Mag .15s in to things for years. I've never broken off a needle valve, but it's pretty common to have the carb rock back and break out the front of the crankcase, where the carb mounts. You can fix this with JB weld. You can also reduce the chances of it happening by adding a fillet of JB weld around the carb mount area in advance, and rotate the carb, moving the needle back, until the carb touches the crankcase, then it's braced and can't move back as much or as easily. Works for me.



Same here. I have never broken a needle valve assembly on a Magnum.

(in reply to Montague)
       Post #: 13

RE: Remote Needle Valve / Magnum XLS .15 - 8/8/2007 12:38:19 AM   
Tbone4life



Posts: 138
Joined: 2/17/2006
From: pearland, TX, USA
Status: offline 		Rick and A couple other combat guys at Tom Bass, use a 8x3 and cut 1/2" off it or somthing? forgot exactly how they do it. maybe I'll just wait til sunday and break it in when I first get there.

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Club Saito #540

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RE: Remote Needle Valve / Magnum XLS .15 - 8/13/2007 6:45:02 PM   
sgilkey


 

Posts: 143
Joined: 2/27/2002
From: Shelby Township, MI, USA
Status: offline 		get the carb plug for the Mag 28, 32, or 36 XL RNV engines. you can get it from Global for only a buck or so, and the shipping on small parts is only $3 or $4. Remove the NVA from the 15 carb (it's either a 7 or 8mm hex, can't recall) and then screw in the carb plug. Then use a remote NVA like the OS. The best one, I think, is the RNV body from the 40/46LA (the latest version that mounts to a separate metal bracket, NOT