HI guys,
I got my second airplane, a sig somethin' extra. I've been flying my Lt-40 for about 2 months now and this is my winter build. I can do almost everything with the Kadet and am planning on flying it all winter.(already made skis)This hobby is the greatest thing that ever happened to me. Now to my question: I was wondering if an OS .46 FX with the right prop and stuff would be enough to allow the somethin' extra to hover. I'm getting a great deal on this engine used 1 season only about 20 flights for only 90$ canadian.
The somethin' extra is easier to build than the LT-40 it seems but I guess I got a little experience biulding the LT-40.I'm already done the wings and tail feathers and I only got it 4 days ago. Any help is greatly appreciated.

It will hover it with the right prop. A APC12x4 or APC12.25x3.75. It will not pull out with authority,but will pull out. I have one with a ST.51. It will hover at 80% throttle with a 12x4APC and 15% fuel.


David

Hi JR, I have a Something Extra with an OS 50SX on it. I feel that the 46FX has more power than the 50SX. I fly an Ultra Stick with a 46FX and it weighs more than the Extra. If the control surfaces were a little larger on the Stick than it could hover at maybe 3/4 throttle. You plane / engine combo sounds fine for hovering. I would use a 12.25 X 3.75 APC prop. You should be able to get it to hover around 1/2 to 5/8 throttle. Make sure you practice this at an altitude that will allow for learning and mistakes. Best of luck this Spring.

Hi Junior Flyer,

I purchased and flew the SE for the first time two weeks ago. I really like the plane, it is very stable at slow speed, but also very responsive and will do a lot of manuvers.

The control surface movements are very aggressive for your second plane. It was suggested to me to set the "Low Rates" at 60% of the suggested control surface movement, with 60% expo for your first flight. This was very good advise!

Also set the "High Rates" at the standard low rates. The ailerons are very sensitive at this setting.

By doing this you won't have any surprises for your first few flights - after you get used to the above low rates, then throw the switch to the above suggested high rates and give them a try.

This will gradually "break you" into the plane so you will enjoy it.

Once you get to know the plane, and are comfortable, go with the rates suggested in the manual, the plane will be very sensitive then.

I hope this helps.

Fly4Fun,

Wayne MIller

I was in a similar situation as you are. I decided to go with a 4 stroke. This will let me go with a larger prop which is essential to be able to hover and have the power to pull out easily. A saito 72, YS63, etc, would be perfect.

i have a somthing extra also with a 50 sx on it and a 12x4 narrow prop and at 65 to 75% hover on 15% the only thing that i did was to remove the baffle. somthing else you might try later after you get used to the plane is spoilersand flapperons this rocks! i've had minesince april and love it.

I had the SE arf version with both the tt pro 46 and the os 46 fx. I put an 11x5 on it and it had plenty of power to hover. It wouldn't rocket of the hover but it would pull out no problem. I then put a Macs tuned pipe on the OS. loads of power and unlimited verticle.

On this particular airplane, prop length can become a problem. For max "pull" you want the largest diameter you can use (within the recommended range of the engine). On the SE, a 12" prop will hit the ground if you don't keep the tail down a bit on landings and takeoffs.

One thing that I did on mine to keep the prop from hitting the ground was to replace the low gear with one that is taller. Also added a sullivan tailwheel for a little more clearance as well. This will allow for a longer prop if you want one.

The more prop the merrier for hovering. A wide, long prop.

MA 12x4, take the bow out of the stock gear and it'll clear fine.

What are the Measurments of how far down the flapperons have to go?