AllTheGoodNamesAreTaken

My Feedback: (180)

Agreed. OS 8 or Rossi R4 plug. 5% nitro 20% oil with some castor! APC 9x7 and a Jett Muffler 15,500 RPM.

MJD

My Feedback: (1)

12,600 rpm is low rpm, not high. 15-16k is nothing - just average sport rpm. You can start worrying about rpm as you approach the 19-20k mark. You don't "scald" 2-stroke engines by reducing prop load and running them faster - in fact as a general rule they run cooler with smaller props. Lugging them down with oversize props is more harmful esp. if the engine is running on too high nitro and and a too hot plug which drives it towards preignition. As suggested shoot for the mid teens, you'll see more power from the engine and it will be happier.

rjbranchii

Has anyone powered an outlaw with a .25 sized motor? Does the balance work out better? Do aerobatics improve? What size props have you used and what kind of speeds do you see? I'm looking more to aerobatics rather than all out speed.

bob

combatpigg

My Feedback: (3)

Think of a .25 having the same size case as a .32 to .36 size engine but potentially heavier with a thicker liner.
I'm not sure if this true with all brands, but in the past this is how it was with some brands.

The .25s I have ran were decent, but pretty tame. With a 9x4 or 8x5 prop you could expect OK performance out of most of them.

Lomcevak Duck

My Feedback: (14)

It balances perfectly with a .32. If my memory serves me correctly, Jerry Smith designed the plane around the OS .32F. I can't really see any advantage to using a .25.

evan-RCU

The OS .32 came from the .25 so they are about the same weight. I think the .25 was rated at 1.0hp and the .32 was 1.2. Later the .25FX was shown with a lower power out, about 0.85hp.

MJD

My Feedback: (1)

As a general rule, .32's are in the same engine block size as the equivalent .25's. Much the same as .40's became .46's, then .50's, then .53's etc etc, all in a .40 size case. Well, now we even have .60's and a .76 in a .40 case. And .90/.91's in .60 size cases.

So rather than .25's being overgrown .15's for example, they are in the same general case size and weight class as .32's. I do not know off the top of my head what the exceptions to this are, but as a general rule of thumb I believe you will find it holds true.

Lomcevak Duck

My Feedback: (14)

Since I happen to have a .25FX and a .32SX sitting around, I took a few pictures for comparison. Ignore the oil on them, as they have been pickled for future use.

The .32 is always pictured on the right, and the .25 is the one with the spinner and glow plug. As you can see, they aren't the same case, but they are very close in size.

MJD

My Feedback: (1)

How do your two examples compare in weight? I dug up some specs online, they are subject to the advertiser's error:

OS .25AX Weight: 12.6oz (357g) with muffler
OS .35AX Weight: 12.8oz (363g) with muffler
TT Pro .36 Weight (w/muffler): 11.4oz (323g)
ST G-34 Weight with muffler: 363g (12.8oz)
Magnum XLS .36 12.? oz with muffler
Jett BSE .35 AAC 13.9oz with muffler (tuned exhaust, not a regular can)

In the .40-.50 class, here are a couple of examples for comparison:

Sport-Jett .50 16.5oz
OS .46 AX Weight: 17.2oz (489g) with muffler
TT Pro .46 Weight (w/muffler): 17.01oz

I don't suggest that .25's and .32-.35's have identical cases, but in terms of engine weight class they appear to be pretty close.

Lomcevak Duck

My Feedback: (14)

Sorry MJD, I don't have a scale small enough for measuring the weight of engines with any precision.

MJD

My Feedback: (1)

No worries, just curious. I think the engine weights above tell a lot of the story.

poiyt

Outlaw owners, a couple q's re my Outlaw ARF/ Webra 32+mousse can/ Omega 15%/ 9x6.


Starting the Webra 32/mousse...hand-flip or elec starter? If elec starter, that means a prop nut or spinner?

Fueling....can't see the tank. How to know when fueling complete? On a reg setup I guess you get a few drops out the stock muffler...maybe on this baby you pull the pressure tubing off the nipple of the header til fuel comes out?

thx
Jeff

Lomcevak Duck

My Feedback: (14)

You can start just about any decent glow engine with either an electric starter or a chicken stick. I prefer the elctric starter method because I am lazy, but a properly tuned engine is no trouble to flip start. If you use the electric starter you will need a spinner or a prop nut/hub of some type. I prefer the cone shaped prop nut on this design.

Please don't take offense to my question, as I mean only to help, but this isn't your first airplane is it? I see through most of your posts that you fly helicopters. Although that takes quite a bit of talent, I can't recommend that your first fixed wing aircraft is an Outlaw.

freakingfast

My Feedback: (3)

Generally, it's not a good idea to run over 10% nitro in a Webra airplane engine.

poiyt

Duck, great question....and no it isn't. In fact I've been ripping it up very fast and very quick w/ both my Stryker and my Grayson Funjet and have become fairly decent with those in high-speed stick-jammin. I hand launch em both. I also 3D-fly my Sabre 47 profile (AX55). So, lookin to try something a bit...'different'. But thx for the heads-up. Outlaw ain't a trainer!!!!

poiyt

[/quote]

Generally, it's not a good idea to run over 10% nitro in a Webra airplane engine.
[/quote]



Well, crappo. I sure hope I don't have to lug around a 3rd fuel type to the field!!! 30% for the heli, 15% for the plank, and now a third gallon?? Yikes!!! Aint there something I can do, like a head shim???

Lomcevak Duck

My Feedback: (14)

You can run the OS .55AX on 10%. You will not lose a significant amount of power.

I have never tried a head shim on anything, but I don't see why it wouldn't work.

Pylonracr

I agree, the AX55 will run fine on 10%. I live at 4500', and 10% is not enough. I raise the compression in everything and run 15%. If you live over 2000' I would run 15% in the Webra and the AX55.

ger56

Hello ,

Just made the first flight with my outlaw and invine 0.39 .

Does anyone made some protection underneath for landing ?
Does also anyone have made a starting block to maintian the outlaw while starting the engine ?

Thank's for answers

Ger56

freakingfast

My Feedback: (3)

And, if it's not too hot. About 5 years ago when the Webra 55 GT (round black head) were all the rage, guys were just thrilled with their engines in spring and fall conditions, then when it got in the 80's to 100's they were burning plugs, couldn't tune them, chasing plug heat ranges, the engine were sagging even when the mixture was right. Then it was discovered when run on 5 or 10% and they were even stronger than the cool days on 15%! There were some guys that just kept pushing on 15% saying it needed more time to break-in, and eventually the engines would settle down.....after losing pinch or hammering the connecting rod thus moving the rod hole centers closer, not the right way to lower compression in either case.

crispinchurch

have any one put a undercarriage on the outlaw