Is saitos 56 an overkill for this plane?

http://www.sigmfg.com/cgi-bin/dpsmar...RC49_2ehtml_01

I want it to behave as realistic as I can get it. thanks.

Hans AA,
The Saito would be on the upper end for this plane, but I think you will be ok with it. Just make sure you balance the plane. And you can always throttle back.

Hope this helps.

The saito .56 is a great little engine. Not too much power, just right for the smaller, lighter models! You'll love it. Mine starts right up, idles nicely, and transitions like a pro!

The LT 40 would be a better choice with the Saito 56.

I consider the engine to have much more power than my OS and Magnum counterparts.

This Saito will have much more power than needed for the MK II but you don't have to run it full bore all the time.

Watch your balance, the engine will mount farther forward than a two stroke because of the carb on the back.

Enjoy,

Jim

Hans- The Kadet MkII was my very first airplane, and it flies great, and was an easy, straightforward build. A .56 Saito is more than the plane needs, but there would be nothing wrong with using it; as said above, just throttle back. I had a Tower .46 2-stroke in mine and it was a lot of engine for the plane. You could probably get by with a .40 Saito and have it fly the basics, like a trainer ought to, but I would do this:

Take about 2/3 of the dihedral out of the wing when you build it. This plane is an old design, and can be built and flown without ailerons especially with the amount of dihedral it has. I built mine with half the dihedral designed in the kit, and wish I had taken more out of it. This plane has a fairly short tail moment, and will turn very quickly, and also has a sensitive elevator, but it is very stable and will fly fairly slowly if you want, but with power and a hgih pitched prop, will haul butt, too. Put the .56 in it, and have a ball.

Just don't try to fly through any 1/4 scale planes as I did with mine, you'll lose. One of my friends was flying his 1/4 scale Cub, I was also in the air, but thought I was above and behind him as we approached. We met at about a 30 degree angle, prop to prop, and my Kadet became balsa confetti; he was able to make it to the runway with a broken wing root and cracked fuselage, but all that was left of mine was the tail feathers. I got the engine back that day, but the radio and servos landed in a cedar tree and I didn't find them for a year, the receiver still works!

Good luck on your build. Ken

the plane is already under construction and thank you very much for your replies. I've decided to go with the 56. regarding your building tips: their under [link=http://www.rcuniverse.com/forum/m_3013794/anchors_3013794/mpage_1/key_/anchor/tm.htm#3013794]consideration [/link]. for those who have experience with this kit: i appreciate any suggestions and thoughts.

thanks.

hans aa.

get an os 1

Hans AA. The Saito 56 would be a little overkill, The 50 would be a better choice, but the 56 would be better for a second plane. RC Ken has the right idea, but you could go with a lower pitch prop also. Just be sure that your ballance is right on or maybe just a tad nose heavy. The plane would do just fine with a 12X4 or 12X5 prop.

Bruce

How about a Saito .40? Should be enough for the Kadet. I fly an older Kadet with an LA .40 and it's way more power than the airframe needs. Plus it's lighter than the .56 and a bit cheaper...... just a thought.

Andy

get an os

thank you all for helpful answers, i finally went for a Saito 45S. but when i opened the box yesterday, the manual said it's best suited for 25-30 class 2-stroke!!. do i really have to send it back in exchange of an saito 50? for me it's very important not to overpower the plane, cause i want it to behave naturally. therefore i was a bit afraid to order a saito 56, and even a 50. i've done a few searches on the 45S, and it seems like it's out of production. why? this is my first real plane with an engine installed, and i guess it wil be around for some time. therefore it's important that the engine can handle take-off's in the snow (live in norway)etc. so: do i have to replace it or what?

khodges: sorry to hear about the crash. try to dive into your friends next time you fly together, maybe the outcome willl be somewhat different then? i don't know. regarding the dihedral, i built the wing after your directions, and i asume it will be perfect for semi-acro-flying when time is due for that.

another option is to wait with this engine until [link=http://www.udisco.com/hobbies/pics/012023.jpg]this[/link] plane is finished, and buy a new saito 50 for the Kadet MK II? with a high wing acroplane like this a little extra power is welcome, or what? it's a pilot california-28 according to the manual best supplied with a 19-25 2 stroke. maybe the 45 will be to heavy (484g w/muffler).

ok, thanks.

I have one of these models. I think the Saito .56 would be a pefect match for it. I actually mounted a Saito .72 on mine once (to break in the engine) and it balanced out quite well. It currently has a Supertigre .40 , and that engine pulls it around just fine. It's a nice plane to fly and has good flight characteristics. I think you will enjoy it.

The .56 will NOT be overkill for this plane. I'd dare say that the .56 is not overkill for anything larger than 1/2 A (Tongue in cheek). But, for real, anything in the 5 lb class will be suited nicely for the saito .56. Anything over 6 lbs is almost too heavy for this engine. It's a very capable little engine, if fitted on the right airframe. I originally had mine installed on a contender kit built that weighed in at around 6.5 lbs. Although the engine would fly it, it wouldn't do so to my liking. It took quite a take off roll to get it going, and wouldn't pull it very fast at all. Vertical performance was non existent. I finally put a .72 on the contender and really love the airplane now. I put the .56 on a little .40 sized low wing stick that weighs about 5.5 lbs or so (maybe a little less), and it's a perfect match for the engine. Still not unlimited vertical, but much better than before. Plenty of authority for the lighter airframe! Go with the .56, and you'll be excited!

Hello Hans; I would go with the Saito 45S, it will have plenty of power for the Kadet. I have 2 45S' and like them quite a bit. I think that Saito write that in their instructions so that people aren't expecting overwhelming power out of it. I have a 45 that I used for over ten years in our club trainer, a PT40. The "S" version has more power then the earlier 45s. I also have 3 50s, and like them too, but I think you'll be happy with the 45S. It seems to me that most people that post on this forum like to over-power their planes, I guess the feeling is "I can always throttle back", or maybe they have high altitude to deal with, which would need more power. I fly at sea level, and seem to get better performance then is usually reported here. We have had a few Kadets at our field, usually with 40 two strokes, one I remember had a K and B 29 sportster in it, it flew along just fine, took off in a reasonable distance.

I also have a Saito 56 for a Gee whiz Bee that I'm finishing off right now. I flew that engine in my Sig Ultimate fun fly until someone saw it flying and had to buy it. I liked that plane so when he asked me how much it would take to buy it from me, I told him a ridiculous price ($275), He just wrote out the cheque to me, so I took the servos and engine out and gave it to him. I wish I hadn't.

I've also built the Mk II and used a Saito .56. Great combination. Stay with your first thought. It won't be over powered at all.

Rich

I have the SIG LT-40 with a O.S.52 fourstroke and it's a perfect combination.
Enough pull for easy take-off and then cruising around at less than half throttle for half an hour before landing.
This thing is extremely fuel efficient and I think the power is just spot on.
Must be one of the most easy planes to fly and the engine is very userfriendly.

The plane is configured as taildragger and I run a Zinger 12x6 wooden prop, OS#8 glow plug and Byron fuel

Wow! The saito 56 must be one heck of a power plant......a freind of mine is using one on a Goldberg 80" span J-3, and it's being used on Kadet's......THAT's flexability!