loughbd

The OS26 will fly many 25 sized airplanes quite well. I have one on a Pilot QB25L and it flies just peachy

Broken Wings

My Feedback: (20)

You might want to try an "Oldtimer" design like a Playboy or a Buzzard Bombshell, simple three channel with a set of Trexler air wheels. The little four strokes work very well in this type of model as the airframe is very light weight.
Just a sugestion...Smiles

Sport_Pilot

I would think a .30 four stroke would work on any model where a somewhat heavy .20 sized two stroke would work.

BWooster

I'm just building a plane I designed for a Saito .30. Any suggestions on a fuel tank size? I thought 4 ozs would be plenty.

w8ye

My Feedback: (16)

4oz is what I normally use.

NM2K

My Feedback: (14)

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Unfortunately, the rule of thumb of making a twin engine model's engine powerful enough to fly the model adequately on one engine, as full size planes are alleged to be designed, leads to flying very overpowered twin engine equipped models. There seems to be something out of kilter in the way that things scale. I'm certainly no expert in this area, so someone with more experience with model twins, please feel free to jump in.

Point being that if the model is designed for two .40 to .60 size engines, I wouldn't go lower than .40 size engines unless you have determined that the designer was grossly wrong in his estimation of power needs. You can always throttle back, plus the engines sound better running at lower rpm on a model anyway. Some folks think of the throttle stick as being either on or off. We know better (wink).

Chris.fr

My Feedback: (1)

A pic of the two smallest 4 stroke mass produced, I love them ... Chris


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Drop a glance : http://e.a.t.chez-alice.fr/AAmoteursminiatures.html

Sport_Pilot

Any pictures of that Global Caprice? I just get pictures of models with big boobs when I do an image search.

gzkpez

MRC is now importing some of the OK and Pilot planes. There seems to be a updated version of the qb25 sold in which you buy the fuselage and wings separately. Also it is now laser cut, should be a nice kit. They do not seem to be importing the pilot scale plane kits if pilot still makes them (other then a nice Zero 30 ARF). http://www.modelrectifier.com/all-brands/pilot.asp

Greg

Yogi-Bear

OS still make a 26 but for cars if you get a prop adapter for it u would be golden it revs out to 17,000rpm if needed and its black hehe looks V cool

Sport_Pilot

Wow what a bargain, kits at double ARF prices!

loughbd

Some of us still take a little pride in building what we fly. If you fly in scale contests you must build the airplane. Anyone can buy a ready to fly airplane. It takes a skilled modeler to build one. Nothing beats the feeling when a little kid asks, "where did you get the neat airplane, Mister" and you answer, "I made it, son".

Parkerm

My Feedback: (6)

The price difference speaks to the quality of components.

Sport_Pilot

That may be, but at that price I would rather buy some good wood and start from scratch. I have seen some excellent kits for much much less.

loughbd

You obviously have never built a Pilot kit. The reason for the price is because of the doller to Yen ratio. In the late 80's the bean counters in this country devalued the doller against the yen and the rate went fron over 200 to 1 to about 100 to one today which effectivley doubled the prices.

You get what you pay for.

NM2K

My Feedback: (14)

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It very much resembled the Hobbico Hobbistar .60, only way smaller.

The model was covered in white contact paper with green, pink and yellow crescents made as part of the covering. Very ugly color scheme, however a really good flying model. It was being sold in 91-93 by Hobby Shack. A bargain as far as flying fun was concerned. Obviously, no pictures that I can access at the moment.

Sport_Pilot

Yes, and for that price I can buy some very good balsa wood.

NM2K

My Feedback: (14)

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It will, but it won't measure up to the performance of a good .20 two-stroke when both are running WOT. Still, I love the .30 four-strokes, but I love them in planes designed for .15 two-strokes. They really shine there.

NM2K

My Feedback: (14)

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I have designed, built and flown three or four models of my own configuration. It is super satisfying. Fortunately, all flew better than predicted. Unfortunately, all came out a tad heavier than predicted, but not enough to qualify them as dogs - for the era. By today's standards, they were bricks.

There is a serious shortage of .10 to .30 powered model designs in the world. This is where I would like to focus my design efforts in the future. My previously mentioned Caprice 15, even though it looked like a small Hobbistar 60, was nimble and a spirited flyer. Nope, no 3D, but it wouldn't take much to enable it to fly 3D, if I were so inclined.

What I enjoyed about that model was its ability to handle a surprising amount of wind and rough flying fields. No hand launches were required with my Caprice 15. What I would give to have another one of those ARFs.

lnjfarms

built this from magazine plans. It is called the american nightmare and is aptly named. I have little experiance with twins so that is probably why it is difficult for me. Sounds really great when it goes overhead. And yes I have an extra set of plans
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loughbd

Yup, you might just be able to but your parts quality would be nothing compared to what Pilot produces and the effort would be a real pain. Every duplicate part, ie. ribs, made by Pilot would be identical. I have scratch built and know what it's like. Plus a Pilot kit comes with all the hardware needed to complete the kit. By the time you got done buying everything, the price would be more than the kit and you would have lot's of waste.

BWooster

Artisan,

I agree with you. I made up my mind a few years ago to fly only what I design and build. Keeps it interesting. I tend to build in the .25 range, because the projects don't get out of hand. While I think it is roughly three times the cost of buying a kit, it is at least 10 times the fun. It is still not an expensive hobby.

I have had an OS Surpass 40 for 15 years plus. It burns next to no fuel, is quiet, and is the perfect motor for a Unionville Tiger Moth. Absolutely great. So I just bought a Saito .30. I have broken it in already. It idles at 2600 on 10% fuel. Amazing. I think I'll get right into these small four-strokes.

Sport_Pilot

Part of the high price for the Pilot kits is that it is the MSRP price. So I tried to find a web store for them but cannot find anyone who sells them. Any one know who?

Sport_Pilot

Just breaking in a Magnum .30 and with 10% Omega fuel it is getting 20 minutes on a ten ounce tank. That would be less than 10 minutes on a four ounce tank. Using a MA black plastic 9.5x6 prop it is putting out 11,000 RPM peaked out. One click rich and it does 10,400. Needle is sensitive and no detonation when over leaned so I suppose it needs higher nitro, which would give even short run times.

In short unless pulling a larger prop, I think a 6 ounce tank may be more appropriate.

loughbd

I don't know what you are doing but a Saito 45 runs 32 minutes on a 6 ounce tank on 10% nitro at full throttle.