jeffie8696

I just purchased a new XL.15A and I can't wait to get it on the test stand.

AlphaWhisky

Jeffie8696,

Can you do me a favour please. Can you measure and advise the distance from the front of the drive-hub to the front end of the crankshaft.

Thanks,

Alan W

jeffie8696

Sure. Just as soon as it arrives. You may want to remind me. PTSD ya know.

YELLOW94TA

DOES ANYONE KNOW WHERE ICAN GET A MUFFLER EXTENSION FOR A MAGNUM XLS .15A ?

ProBroJoe

Let me guess... it's going on a Herr Lil Extra?

I ended up hscking, er, um fabricating one out of a piece of aluminum plate that I had laying around. I think the thickness was around 3/16" and I was able to re-use the original screws - I probably spent way too much time on it, but I couldn't bring myself to spending the $12 that Tower wants for one... just the principal of the thing, ya know? Oh, FWIW, I used nothing more than a cordless drill, a sharpie, and a file.

http://www3.towerhobbies.com/cgi-bin...?&I=LXCA84&P=7

Pay no attention to the results of the botched inverted harrier attempt... [X(]

Hope this helps,

-Joe

vertical grimmace

My Feedback: (1)

From talking to my combat buddies, the Magnum XLS is a lot stronger than the old XL. I have an XL and it is OK power wise but it seemed like just a slight upgrade from my old OS FP. I have heard the XLS is close to the OS CVA. I have a CVA and it is a good engine. I really like the carb but I do not know if it is worth the money.
The great thing about this size of engine, there are a ton available with greatly varying degrees of performance. It really comes down to how much money you want to spend. For super hot performance, seek out the Profi, Fora, Nelson engines. I also have some Cox Conquest .15s as well.
It seems right now for the money, the Magnum XLS maybe the way to go for a hot setup, while an LA would be more sport. I think it really comes down to your objectives and the amount of money you have.

rainedave

My Feedback: (1)

I spent some time today breaking in my new XLS. I got three runs in. Even at a very rich setting it was turning an APC 8x4 over 13,900. I also have an XL .15A and this new one is a much nicer engine.

David

jeffie8696

Dave, I got a nice XLS 15. it runs really sweet on 20% nitro. There is an XLS 15 category in the user reviews now. I posted my results there.

AV8R-RCU

I also agree with OzMo on the OS LA15. The SSC guys swear by them. Here's a few links that might help you, if you decide to go with the OS LA15...

http://www.georgiacombat.com/OS15EngineSetUp.htm

http://my.att.net/p/s/community.dll?...pid=276092&ck=

http://www.treneffrc.com/default.asp

http://www.treneffrc.com/products.asp?cat=26

http://www3.towerhobbies.com/cgi-bin...4&I=LXCF83&P=K


Byron

1fishnfool

My Feedback: (42)

Quite wasting your time and spend 200 on a fora .15.It will turn a 6.5x4.5 apc at least 25,000 and would blow the blades of the r/c combat 8-3.

vertical grimmace

My Feedback: (1)

The SSC combat engines are restricted by the rules. they can only go so fast and 17,500 with the prop they are required to use really is not very impressive to me. It works for what they are doing but those engines really do not have the ponies that other engines have. the Magnum XLS actually has too much power for SSC and to some degree has to be de-tuned to be compliant with the rules.

rainedave

My Feedback: (1)

Does anyone own both the XLS and the OS CV-A? I would like to know how they compare with a range of props, say, 7x5, 7x6, 8x3 and 8x4.

Thanks,
David

combatpigg

My Feedback: (3)

I don't know from first hand experience, but something tells me that a Fora or Cyclon .15 would fall flat on it's face if you try to run them with 8x3s. The .049-.061 versions become very ordinary if you try to run them with sport sized props.
If I'm wrong, I'd like to know just how well they can turn a 8x3, 7x4, 7x5, etc.?

vertical grimmace

My Feedback: (1)

I think it may be difficult to compare a longer stroke engine like the old FP and the LA engines compared to the high performance .15's that are meant to rev. They all have their power band in a certain RPM range and you do need to prop accordingly. But none of these engines need a pipe to perform, so they may be a little less sensative to prop load than they would be otherwise.

combatpigg

My Feedback: (3)

VG, the only Cyclon .15s I've seen come with that stubby silencer in back. Is that meant to give a boost? It looks too small to be there for more power and it sure doesn't seem to help much with the blown eardrums! One of these days I'd like to get one. I've got other "must haves" that need to be either blown up or worn out first.
I was just entering the hobby when .15 pylon was fizzling out, so I've never seen any of that stuff in the air. I'll bet a hot little 3/4 scale DD with a Cyclon .15 would seem every bit as fast as a .32 powered bigger brother?

vertical grimmace

My Feedback: (1)

The mufflers on the Cyclone are for rules compliance in FAI combat. Not really doing much otherwise I guess.

Andrew

Before the rules change killed off Formula 1 pylon, the typical engine had a short open pipe. I don't know if it added any tuning or not, but they were indeed loud. All QM40 and Q500 engines now have a muffler/tuned pipe. Still exciting, but not the piercing scream of the old F1 motors when they were wound out.

vertical grimmace

My Feedback: (1)

The straight exhaust of the formula one engines did not add performance other than zero restriction. The 1\4 wave mufflers on the modern q-500 and q-40 engines do when propped correctly. That was one of the magical things about the Nelson at first. FAI racing still use full wave pipes for performance boost as well.
Many of the FAI .15 CL combat engines actually have a rubber muffler for durability. Still not really doing anything other than being legal.

combatpigg

My Feedback: (3)

Some of the Open A rc combat guys use the Cyclon .15s too.....I've got no idea which prop they use to haul those 5-6 foot combat wings around with. Word is that they have an edge over the sport engine powered wings, but not as much as some would think.
I think it would be a real kick in the shorts to have a screaming .15 set up on a speed plane. My piped CVA falls a little bit short of the mark. One of these days I'll set it up like my piped K&B 6.5 just to see what it's got.

vertical grimmace

My Feedback: (1)

I would bet the cyclones are running props in the 6" - 6.5" range. Maybe 7". That is just really too small to effectively pull a big combat ship around. If you could build one light it would perform but then it would not survive.
Maybe get a hold of a CL speed pan and build your plane around that. Something more for the extreme speed forum.
Regaurdless, .15 is a wonderful size and probably has the broadest performance range of any displacement.

jeffie8696

I have more 15s than anything else. No I dea why.

uliner

My Feedback: (2)

F2d engines (profi's and cyclon .15's) usually turn a 6" or slightly larger prop. They will turn a 7x3 nicely. I use them for Speed Limit (80mph) control line combat with a 7x3 prop. They are bullet proof and I love them. I do not think they would turn an 8x3 as they are timed for high RPM.

The muffler does nothing. It was a way to specify a standard exaust outlet. They have a venturi restrictor also. Some guys are flying speed with profi's

Consider the mvvs .15 only about 60 new at hobby club.

combatpigg

My Feedback: (3)

Hi Uliner, a couple local guys [Jeff Rein and Ken Burdick] are promoting 80 mph with Magnum .15s. They've got Henry N. working his magic on one of those $80 specials to see if they can come up with a low cost alternative to the more expensive motors. According to these guys, 80 mph with .15s is real easy on equipment.

vertical grimmace

My Feedback: (1)

Interesting. We flew 80 mph GX combat here for years. The .15's then would be used on an FAI style (smaller ship) on 60' lines? I still have a fleet of my fast ships that I used to used. Home made foamies for .36's. Where is a good place to buy FAI ships? Please do not tell me George Cleveland!

combatpigg

My Feedback: (3)

I believe they are flying with 60 x .015 lines. The light planes supposedly tougher than heavier .25-.40 sized planes....less kinetic energy. Jeff and Ken would most likely be flying home made foamies. I could get you in touch with Jeff if you want more info.