coveredup

My Feedback: (1)

Which profiles would suit an OS 61? I see lots of 40 and 90 sized models, but there is this big gap between the two. Anyone know of a profile with a ~55 inch or so wing around 5-6 lbs? I am new to the profile thing and probably just havent looked in the right place...

Thanks,

jeff

Quicker

Check out the OMP linup at [link=http://ohiomodelplanes.com/models/]http://ohiomodelplanes.com/models/[/link]. They've got some 60 sized birds.

PaulSwany

My Feedback: (45)

The 60 size SuDoKhoi has a wing span of 54"..... Only problem is it comes out to 7 1/2 lbs and it's a beouch to build... It realy needs a 90 size 2 stroke for power and coupled pretty bad in knife edge anyway.... I'd also like to see a true 60 size profile that would come in around 5 1/2 - 6 lbs..... and could be powered by a 60 sized 2 stroke or a 90 sized 4 stroke...

I'm working on my own design to fill this need, but it's not near finished yet... Trying to get the 40 size version done first... It's called the MoJo and has a 45" wing span and is targeted for around 4 lbs.... If I get my regular job situation squared away, I'll have it flying soon.... Unfortunately, I got layed off from my "real" this last Friday, so all my time is spent looking for another job.... But rest assured, I'll have it flying soon!!

Quicker

Man, sorry to hear about the job Swany. Maybe it's a sign. Make designing R/C planes a full time job. Everybody knows you're good enough for it.

coveredup

My Feedback: (1)

YES! as a happy burrito owner I hope it comes together. Sorry to hear about your situation.

I have 2 grreat 61s that I dont want to put in a 60-90 model. the OS SF pumper and my OS FSR "M" type carb both have a low, mid and high needle which should be great for 3D.

Constrictor

My Feedback: (46)

The problem really isn't one of there not being any birds in the size range of the .60-.61 size 2 stroke as much as these engines are old designs and have a bad power to weight ratio. The heavier frame that the .61's are made on are just too heavy and not powerful enough. All of them are in the same boat: SUPER TIGRE, THUNDER TIGRE, OS MAX, WEBRA, MAGNUM and whatever other brands ive missed all just too heavy. when they make an engine that is 50% more powerful and 50% displacement for the same or less weight, the old size just isn't worth much anymore

coveredup

My Feedback: (1)

good point...I think my SF is 22 ounces, or something like that.

dean320

My Feedback: (5)

How about the Extreme Flight 540? Everyone seems to love this plane and many are putting more engine on it than you are thinking of. I am finishing their 68" YAK and the quality is incredible, I would assume the 540 would have the same quality. As for the Morris Su-Do-Khoi, I have a 40 size with an Irvine 53 on it and it is a strong combo. I would probably go with the 540 though.

Constrictor

My Feedback: (46)

putting a bigger motor on these planes like people are doing is fine...............as long as the engine has enough power to pull itself and the plane which the .60 class 2 stroke motors cannot do for the most part.

Spastic

Hey constrictor,
interesting theory.. can you show us some numbers? i was thinking of the same thing why no real 60 size planes.. but i'm not convinced because you and i know that all 2stroke designs are old designs, aren't they?
i see your point that most 60's are overbuilt, you can boar out a 60 to a 75
Wasn't the 61 size pattern plane was very popular a few years ago?
sorry i'm hard to convince, it's not that i like to argue..just friendly debate
another theory is that there is not a big enough diff between a 48" span 4 pound plane, for a .46 and a 5.5 pound 52" span plane for a .60 so many manufacures dont bother...??
what do you think?

Spastic

OK never mind, i see that according to tower the os 61fx weighs the same as a 91fx, 24ish oz

Gordo-ProBro

Have to agree with Constrictor on that one too. The .61 size seems to have fallen in a hole, if someone actually put together a TRUE .60 sized 3D plane, we'd all be putting Saito 1.00, YS 1.10 and 2 stroke .91 on them, since the weight is the same or even less!!! Since the .61 isn't seriously more powerfull than the high end .46 and .50 motors, but are much heavier, seems like they wouldn't do much good for 3D!

Constrictor

My Feedback: (46)

If you put a .61 on a .40 size bird, you will end up with about the exact same virtical power as a good .46 because the .61 weighs so much more than a 46.
What was great several years ago is not very good by todays standards. a .91 2 stroke has 50% more cubic inches as a .61 and weighs the same or even less in some cases. I'm not going to spend a bunch of time getting numbers together, the .61 2 strokes are just too heavy for the power they put out for a 3D plane anyways. I cannot imagine why anyone would buy a new .61 when the .91 are so superior. The best place for a .61 is on a .60 size trainer, the .61's do run great!

coveredup

My Feedback: (1)

heh, the VERY reason why I have all these 60s. my early teenage years were spent flying pattern with 60 sized kaos, calypso, and a tipo 750+. I guess the old hatori 650s (quiet long pipe, not the raspy on/off ones) would almost be just dead weight too.