You guys are making it very difficult for me to keep my check book closed!

never mind

Believe me, the second one was MUCH easier to write. I suspect the 3rd even easier when the time comes.

Does anyone remember the weight right out of the box? Just all of the airframe with gear and wheel pants? No motor mount etc.

I think I still have that info written down at the shop. I'll look tonight.

Hi Guy's,

Some Aussie flyers have been waiting patiently for the Proline to arrive in Australia, and they finally have. They sure are as beautiful in the flesh as I've seen from your posts.
Thanks also for the setup and trimming info, makes it so much easier to get it togther quickly and in air.

No problem Hobbyman,
I'm building a brand new one for another fella here in the states and the newer kits are even better than the first generation. Many little tweaks were made to simplify the construction even more. And the composite seam is now painted! Big BANG for the Buck on the kit.

Be sure to stick with the Hyde AR80 mount, is just screws right in with zero effort or aligning.

Enjoy.

Joe

What are the glow versions of this plane coming in at weight wise? Is this plane light enough to make weight on an electric set up?

Thanks.

Based on the Astral XX I have, my bet is they are not and if they are it'll be close.

All of the Astral xx`s here are/were light enough to convert,ie;4/5 in no... ,so far 4 have converted ok.

Actually, these have been coming in right at 10.5lbs with the YS DZ 160. That's withough really trying. I'm using a 5 oz standard battery pack.

I can't wee where switching to electric would be difficult at all.

Joe

Is there sufficient room between the wing and belly pan to support the installation of a conventional 2" diameter 2 cycle pipe ??
TIA...Ed M

Hello

Yes. i asked the same question about 5 months ago...Vellum and the like will confirm that their is indeed enough room for a 2 stroke pipe, ( ie. 140 RX ) but the guys here will most likely strongly recommend you go for a powerful 4 stroke as power. I`m still not sold on the 4 stroke thing myself, ( I`m still in luv with the 140 FI ) but with that said they must use 4 strokes in the world championships for a reason right!!
Sometimes i wonder how CPLR or Quique would have gone with a 2 stroke!!! ( food for thought huh? )

Regards

The problem with the 2 strokes is purely lack of torque. These airplanes are so much larger and draggier, and the 2 strokes just do not have the torque. QQ flew the FI's a few years ago, and switched the electric, and now to YS. Yes, it will fly the sequence, no doubt, but there are going to be days when you simply do not have the power. The YS out turns the OS 1.40 by a wide margin when loaded. On a very hot day, you will simply not have the same power. On a cool day with light winds, you wont have any problems, but when the winds come up and the temperature goes up, you will be at a major disadvantage. The torque curve is not anywhere near the same. The OS produces very little mid range torque. I flew them for YEARS. I loved the way the motor ran, very easy to set up and bullet proof, but 3 years ago at the NATS when the winds were up and the temps were up, at the end of long verticals, the plane just didn't have the power to comfortable make the corners. Mike Hester experienced the same thing. My plane and his in 2006 were all under 10lbs, but with the drag of these new models they simply need more torque, this is where the electrics and 4 strokes have a significant advantage. I have no doubt QQ or any of the rest of the top guys could get the OS 1.40EFI's easily if that is what they WANTED to run. These guys don't fly stuff for no reason. At the level QQ and the rest of them are, they get to pick what they WANT to run. I loved my OS's, but they simply are under powered now. The OS 1.60 is a viable option. Unfortunately it is much heavier, but it will run the larger props and has more mid range torque. I still think it is at a slight disadvantage to the 4 strokes and the electrics, but it is significantly more powerful than the 1.40RX. When I say underpowered, I do not mean what the engine will turn a certain prop on the ground. I mean when the airplane is in the air and under load, does the RPM drop, or does it stay the same. You can hear the differences in the OS 1.40's at the top of long climbs. Mike Harrison has been running the OS 1.40s for years here, and I have seen him several times being very marginal on power. I believe he is actually switching to the OS 200 for next year.

Arch

I think Quique flew the OS 1.40FI when he did because it had significantly more power than the 1.40L's that were commonplace back then. That was right when he started flying the Smaragd, and they were draggy airplanes, I don't think 1.40L's did nearly the same job hauling those airplanes around as the OS's did.

Granted, YS did come out with a stronger motor, but back then, that was the stronger of the options.

There is a strong posibility of a Proline kit for sale at Tangerine. It will not be sitting at the field, but if someone is seriously interested (cash in hand ), contact me and I can make arrangements to make sure it's at the field. Brand new kit, brand new price (www.bvmprops.com).

Hey guys,
the Second one I built has an OS 140 RX with the Standard hatori pipe. It fits right in there with no modifications. Though I didn't fly it myself, I was there for the first flight and the power seemed just fine. Not as nice as my DZ of course.. But good! LOL

joe

What can i say... i cant argue with the physics and torque curves between the 140 FI and say the YS 140, it would be futile. From my experience, the 140 FI is a very powerful engine and it makes in the range of 3.5 - 4.0 hp at full throttle, which should be ample to drag a 2 meter machine such as the Pro-line around, like Vellum says it does in his earlier sentiments. The only real disadvantage i can see with the OS when compared to the YS is the way the power is delivered versus throttle position. The power delivery of the OS relatively speaking is delivered in an non linear or exponential fashion where the 4 strokes is more linear. It does most certainly makes sense to make it easier on the guy piloting a pattern plane through a complicated sequence to make the power delivery linear, it makes power & speed control easy, which makes it easier to perfom a dificult sequence, which potentially translates to better scores. For those of us who dont have unlimited access to the latest and greeatest 4 stroke motors why cant you setup the throttle curve to deliver the power in a linear fashion...with some tinkering, this exactly what i have done. Now although the throttle servo has exponential programmed in to its travel, the power delivery is very linear and easy to anticipate.
With the power the 140 FI makes and with the throttle curve adjusted, i still fail to see why using this engine is not viable in a light model like the Pro-line. Given the model is a of the widebody variety, granted yes it does have higher parasite drag characteristics, but as the parasite drag curve itself increases exponentially with speed then the overall need to overcome that drag with the low flying speeds of this type of model should be relatively low.

Rouge


Have you ever flown a 2x2 with a YS1.60DZ? I have 3 OS 1.40's laying on the top shelf in my shop. I have a YS in every airplane I fly. Yes it's that much better.

My ProLine is finally finished - yes, I'm a very slow assembler. Weight on the plane is 4880g. Fuselage weighs 3800g and the wing weighs 1080g. I have one 4 cell 1500mah Nicad RX pack in there now which I'll be changing to 2 1100mah LiPo's with 5.1v regulators on each with the addition of another switch.

Equipment is as follows:

YS 170DZ
Akiba mount
Futaba equipment - 9154's on aileron, 9602 on throttle, 9151 for elevator and 9255 for rudder
Hatori 823 header and short Hatori pipe

Attached are some pictures...

SWEET!!!!!!!!!!!!!!!!

Are you sure that pilot can see through that dark canopy? [8D]

It's Derek flying, the pilot doesn't want to see whats coming.

Yes i have, in fact i have flown an oxai impression with an os 200, sure it was great to fly, but i was not that impressed actually. Guess i like to be different aswell

Hi Guys,

Anyone know where I can get a set of these. I prefer these over the release latch on my proline.