I have a corsair that weighs 15.25 lbs will a ST G-2300 be a good match?
I dont need unlimited vertical but more power than my OS 1.20 4 stroke Will this engine work for the weight?

It will fly the plane very scale like.

Enjoy,

Jim

But, will I have good reserve power? How do these motors run good, bad or indifferent! ?
Thanks for the reply
Greg

I don't know about that, your sure? i have the 2300 and nice engine but a 15lb plane? Thats about the size of the WM GS P-51 and a 160 pulls it "okay."

how do you weigh your planes? All I have is a fish scale, the kind you hang from the ceiling dont know if they are acurate but it's the only thing I have and I dont even fish!!!!!!!!!!
Any better way's ?

The fish scale is fine unless you want to lay out a lot of money.

Enjoy,

Jim

I have run the ST 2300 in planes weighing 11 3/4 pounds, and it pulls the planes vertically exceptionally well. My first response would be that the ST 2300 would fly your corsair with scale like authority, however the takeoff will need to be done skillfully, particularly if it is the Topflight Corsair. My Topflight Corsair flew just on the margin, with never a problem on the takeoffs with the OS 1.20 FS. I wish I had the ST 2300 for it then, as I am rebuilding one and plan on the ST 2300 up front. My Corsair weighed probably 13 pounds then. Good luck.

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I use a spring scale, but it is sold for laboratory use. Still, it is basically a fish scale. On models weighing over a couple of pounds, it is very accurate. Under a couple of pounds down to half a pound, it is good enough for general work. Below that, something digital and accurate (not necessarily the same) is better.

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Another way of looking at it is that the G2300 on 5% nitro is significantly stronger than a Saito 1.50 on considerably more nitro.

My rule in the smaller planes is to NEVER use lead or heavy prop nuts.

Balance the finished plane with a heavy enough engine. Bigger, like 40 to 60% are a joy to fly on windy days.

LEAD is never a joy to fly.---------My way may not be for you.-----Yes, every plane WW II, can hand launch vertically if necessary. The AT6 thinks it is a 3D at about 75% oversized engine.

I would put more power in it than that.

FBD.

I need a new scale, I can stop the scale at anywhere from 12 to 17 pounds Ill get a digital scale tomarrow then Ill repost the weight!
check again monday evening I really need the input!
Thanks everyone
Greg

O.K the new scale say's 14 lbs 10 oz
now will the ST 2300 power this plane alright?

I would say no to the 2300 for this weight plane. it's a good engine but not that strong . I would go to the 3250, which I recently bought for my World GS mustang (it weighs about the same). but as I have not flown this combo yet I can't say this is a winner setup, but its well worth trying it out. by the way it seems to balance very nicely in the workd GS mustang. I bought a pitts muffler for this - the 3250 comes without a muffler.

ed

whats the power difference between the 2300 and the 3250?

You know, planes do have wings to keep 'em in the air. I ave a GP super stearman I'm building, and I'll be flying it with a Saito 1.80. Another guy at my field has a GP pt-17 with an OS 1.20 four stroke. Both of these planes come in close to 15 lbs. That os seemed to fly the PT well... It jumped off the rough grass field after only 30-40 ft. and climbed out at a 30 degree angle. If the 2300 has more power than a saito 1.50, I don't see a problem if it's proped right. Am I missing something??

Dont get me wrong, the OS 1.20 flew the corsair but without reserve power. just to keep it in the air I feel was about 3/4 throttle. I just was not comfortable with that!
Maybe I'm wrong, I use a 16/7 prop!

Will a regular 12 volt starter turn these's big 2 stroke engines O.K Or will i have to go with 24 volt?

My regular 12v starter just flips them between compression strokes. Back and forth. Flip flop. It's a Tower 90.

Enjoy,

Jim

Hello I have a Mini Max gear reduction 12 volt starter that will turn everything I have from a 46 os to a 160 FX Also a 2300 ST with ease.As far as the 2300 hauling your 14 + lb plane around Hummmmmmmmm I would dare say yes it will but maybe not as well as one might like .Mine is in a 12 lb Shukoi and it does great ,but were not talking apples to apples here .I will say this much don't over prop that engine .I know they tell you it will swing swing 18 inch props and so forth and it will but my plane flys like a slug using them.I keep the revs up around 9K with a 16-8 and cant ask for a better combo for my style of flying and believe me I put them thru there paces .Adding more engine means adding more weight , as I'm sure you know which in turn ups the wing loading that much more ,What corsair do you have and whats the wing area ?There is such a thing as just plain to heavy to fly !!!! MY topflight corsair has a 120 OS 4 Stroke and weighs in at 9 lbs ,its still to crappy to fly yet, so it hasn't seen the air so far.I wished I could tell you yes that engine would be just the ticket but I cant ,but 2 things to keep in mind the price is right and mine is a very good dependable engine ,Starts on 1-2 flips and theres no midrange probs and idles reliable but I also use a type F glow plug.If the weight wont hurt you go with the 3250 thats a for sure 15 lb plane puller .Sorry I cant be of more help

I have a ST3250 on a 15Lbs Suhkio. This is a good match for scale flight. A 2300 is a 1.40 I think. The 3250 is a 1.99. that's a lot of difference. I am a big ST fan but I also think the OS 1.60 is a nice power plant. It would fall in between the two Tigres.

David

W8ye this should have went to you My starter is a Mini Max Gear reduction starter 12 volt, its supposed to be able to crank a 140 4 stroke easy ,all I know for sure is that it cranks my 120 YS without any problems at all.This is there home page and part number www.Maxxprod.com ACC1521 Electric Gear Starter.I like it because its powerfull plus it is small and doesn't take up much room in the flight box.

Richard
Thank you for the info, I didnt know the 2300 was the same as a 1.40. I will definitely look into the 3250. My corsair is a KMP 72 in WS 14.5 pounds. I dont really know how to measure the wing loading. Tell me how and Ill give you the wing dimensions.
Thanks for the help.
As for the weather here in MI I seen my first robbin today.
SPRING IS NEAR!

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If your OS 1.20 four-stroke flies the model well at 3/4 throttle, you'll be able to hover it with a G2300 at 3/4 throttle to full throttle.

One caveat - the G2300 will take some bench running in order to become reliable. If you can't do that, don't buy it.

The G2300 is one of the biggest *****cats to hand start that I have ever seen. I ran a 17x8 and an 18x8 on mine. I don't normally recommend hand starting, so I won't now. Use a chicken-stick. I used an OS Type-F glow plug in mine and something more substantial than a single cell Nicad for starting voltage. This engine does not pop and smack you back like other engines when propped properly.

It is not as "plug and play" as the OS 1.20 four-stroke, meaning that you will have to work with it a bit to get it where you want it (lots of break-in running time), but it is easy to run when compared to many other two-stroke glow engines that I have ran. It is considerably more powerful than your OS 1.20 four-stroke.

A Sullivan 12-volt starter's biggest limiter as to what size engine it will crank is the battery being used to power it. I used to start Quadra 35cc gas engines with mine, but I had to hook it up to an automotive sized battery in order to do it. This was back in the days before folks were using large packs of Nicads and gear reduction units to do the same job.

One way of looking at wingloading is how well the plane will float. A trainer, Stinger and such have very low wing loading and they will float pretty good. My prop jet has a load of 33 which mean if that engine quits, its comin down now and I better have some altitude or be in final when it does.