RE: CMPRO LEO 110
 

BTW do You know the price in Poland?? It's just about 333 US $$$

RE: CMPRO LEO 110
 

We have to remember that power is cheap; see the Excelleron 90 thread where I have a ST2300 in it. Talk about power loading. And some weight gain, too.

There's a point where the wing loading/power loading curves start compromising good handling. We have to figure out where that is and avoid it.

Just wondering though - if the Leo is this heavy, how in the world is their Scorpion going to make 5kg ??

RE: CMPRO LEO 110
 

It's hard to prove that the plane is light without showing it to touch and carry. I was surprised because the weight of the model to it's size is very little in contradistinction to some of CMPRO models. I bought it for 1000 PLN - it's about 333$. [8D]
Regards!

P.

RE: CMPRO LEO 110
 

I guess I'm in the minority nowadays but, I don't think that strapping an obscene amount of power to a plane to fly it makes it a good plane. I guess in the present day world of ARF's it's "whatever it takes" though. See Excelleron thread.

RE: CMPRO LEO 110
 

tph1 - I agree COMPLETELY !!! The reason for the ST on the Excelleron is that of "value". The cost of that particular motor, my familiarity with it, it's overall weight ( as light, or lighter than 4 strokes with far LESS power) and ease of use in this airframe made it the logical choice.

Some of the newer ARF's, particularly those that are sort of kind of like a version of a pattern-capable airframe aren't built lightly enough to use the powerplant indicated and get the unlimited performance that many aerobatic pilots "require". As if the sequences don't:eek:

The Leo looks like it will be a terrific competitor in the 90 class airframe. I hope someone posts some accurate weights as they build...BTW - the Exc. with the ST 2300 is now at 9 lb 5 oz. That's gettin' on up there!

RE: CMPRO LEO 110
 

Well, especialy for you I'll try to check tomorow Leos weight ;)

P.

RE: CMPRO LEO 110
 

Yeah I'd like to know what the actual weight on the Leo is also. It is a very good looking plane. I have been following the other thread and knew the reason for the ST on the Excelleron and agree it is very cheap for the HP you get.
Tom

RE: CMPRO LEO 110
 

Quite apart from the fact that we don't have an actual empirical denial or confirmation of the specified weight yet, you're extending into hyperbole if you're suggesting that's the case with the specified weight of the Leo.

Weight irrespective, the same people will always indulge in "strapping and obscene amount of power" to anything they assemble thinking it makes it a better plane. Until such time as elementary physics, aerodynamics and math sufficient to resolve their basic formulae feature as a prerequisite of a 'ticket to fly' R/C, we'll always have such misunderstanding.

RE: CMPRO LEO 110
 

Damn, those are some awful big words for a simple southern boy to have to sort through. Did you agree or diagree?;)

RE: CMPRO LEO 110
 

Probably.

I think we're supposed to have a good reason before we install a bigger motor. :)

RE: CMPRO LEO 110
 

Heck Bob, I started my trek into pattern with a well-used MK balsa Citation, Rossi .61 powered, with somewhere around a pound and a half of glassing and Hobbypoxy paint on it. It weighed well over 9 pounds! It was a rocket ship, even at that weight, but worked OK for Sportsman, because who cared in those days.

I am certain the Excelleron with that big hairy-knuckled ST and a lot more wing has NO worries at all at 9+ pounds, compared to that old dump truck I flew.[X(]

Rick

RE: CMPRO LEO 110
 

I'd like to look at this plane first hand. There just about has to be a way to lighten that bad boy up.

RE: CMPRO LEO 110
 

Can anybody tell me how wide the distance between the (wooden?) engine mount flanges is? I am thinking of installing an OS 120 4-Stroke or a 91 MVVS 2-Stroke with tuned pipe and wonder if they would fit.

The OS 120 might be a bit too heavy though with this heavy plane. Hopefully somebody can post the weight of the kit.

Thanks
Jan

RE: CMPRO LEO 110
 

As I promised, I have taken some pictures (in the shop: Wimarex ) with Leo to show it's weight:

wing: 828 g
fuselage with cabin and mask: 968 g
rudder: 205 g

Not so bad, isn't it?
Regards!
P.

RE: CMPRO LEO 110
 

No, not at all. 4.4 pounds

RE: CMPRO LEO 110
 

raczej elevator niz rudder:D Calkiem lekka maszynka wyjdzie. Co za silnik wstawisz??

RE: CMPRO LEO 110
 

got any pics of the pipe tunnel and where the tank mounts?

RE: CMPRO LEO 110
 

Not to intrude, but thought I'd share a calculated weight. This example would use the equipment I've put in the Excelleron. It's a guess-timate, of course. But it may give some insight of an RTF weight.

CMPRO- Leo Weights
LeoAirframe Parts 2001
ST 2300 878.8
KS Canister 158.8
Mueller Header/Coupler 53.9
JR 8231 - Elevator 51.0
JR 8231's (2) - Ailerons 102.1
JR 8411SA - Rudder 51.0
JR 4131 - Throttle 39.7
JR 950 PCM Rx 22.7
Servo Extensions 42.5
2050, 4 cell, NiMh 172.9
MPI Switch Harness 17.0
Prop-APC 14 x 6 73.7
GP Spinner Nut - 5/16-24 19.8
Spinner 79.4
Hardware 371.4
TOTAL grams 4135.72


That's about 9.2 lbs... not too bad....

RE: CMPRO LEO 110
 

Bob, Using the difference in weight of the YS 110 and the ST with acces. it comes down to 3845.1 with just that change. So getting it between 8.0 and 8.5 should be possible right?

RE: CMPRO LEO 110
 

I think the difference is about 7 ozs., perhaps less if you want it pattern "quiet", and then you'll add in a header and somebody's 4 stroke muffler/pipe to soften noise. Either way, with the wing it seems to have, shouldn't be a problem at all.

BTW - the weights I posted are not "calculated" for all the items I listed; those are actual weights from my Excelleron. The 'calculated' part is the grand total, and that's because of the "hardware" estimated weight....that likely would vary somewhat.

RE: CMPRO LEO 110
 

the 7 oz. would be enough, but you probably could get a 'lil more if you tried real hard.

RE: CMPRO LEO 110
 

the Leo came in today, very well packed and no damage. I weighed every piece that came in the box, I think the stock equipment, although very complete, is pretty heavy, and it came out to 2372 grams or 5.23lbs. I then weighed my motor/prop/spinner, header, pipe, all servos, battery, switch harness, receiver and fuel tubing and it came to 3757 grams or 8.28 lbs. The only gluing to do is the CA for the hinges so I beleive it will weigh less that 8.5# r.t.f.

RE: CMPRO LEO 110
 

something else I just found, the Leo is designed to have the tank on the C.G. also has knockouts for forward mounted throttle servos.

RE: CMPRO LEO 110
 

What sort of elevator and rudder setup does the Leo use?

RE: CMPRO LEO 110
 

pull/pull rudder and it comes with a wooden dowel pushrod elevator but I'm going to change that