cymaz

Hi all
As you can guess from the title I need some advice on which engine to choose for the SIG Somethin Extra that I have just built off plan and flown. It has an old OS 46LA in it at the momement just to get it in the air.

And it FLIES LIKE AN ANGEL!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

There is a Du-bro 10oz tank in it so any advice on flying times with various engines would be much appreciated here in dear old England.

All the best ........................................ Cymaz

iluvflying

What could fly better than an angel? Sounds like it is doing just fine. More vertical would mean more power I assume, otherwise it sounds like you are happy?

Philip

Mr67Stang

The Sig SSE is an outstanding plane. The engine choice should be based on where YOU want to go with your flying. The .46 LA would be a good choice for someone who wants to learn pattern manouvers or just general sport flying and does not require unlimited virtical to have a good time. The .46 AX would not provide unlimited virtical but a bit more power for more agressive manouvers. The .55ax will bring you to BALISTIC performance. I fly mine with an OS .50sx and a 13x4 APC Sport propeller. Be advised I had to have custom landing gear to fit this prop. The stock landing gear will support a 12 inch prop provided you perform a 3 point landing every time or you can bend the lending gear inward to increase prop clearence but you will not get enough out of it to fit a 13 inch prop. Mine with the .50sx will hover with about 75% throttle. I have a 55ax in a Funtana and that engine will out pull (read as more torque) my .50sx but the .50sx has more top speed. So to answer your question... How do you want the plane to perform?

cymaz

Thanks for the quick replies and advice. With the 46LA the Sig does tend to battle against some of the strong on-shore wind we fly in here near the sea in the UK. If I go for the 46AX then I could use less throttle for a while....umm.

Any ideas on flight times anybody??????????
Cymaz

Mr67Stang

As a basline estimate you can expect similar flight times out of the .46la and the .46ax give or take a minute. The 55ax at a guess and after it is fully broke in may fly for 2 minutes less based on a 10-12 oz tank.

freakingfast

My Feedback: (3)

The 46AX or the 55AX are both very good engines. They seem to have very different porting, the 55 is not just an up sized 46. The 55 is good with larger props at lower RPMs, wereas the 46AX is a more traditional quality 46 class engine. Both engines can be made to do about the same performance but with different props and I think the 55 seems to do it with less fuel and noise. For your Somthing Extra I bet you would have a blast with 55 and a 10x7, 3 blade Master Airscrew for punch, hover, breaking and ground clearance.
If you need more power later, just add a after market tuned muffler for shocking performance. This engine wants to break-in with a rich two stroke at WOT. It needs heat. Don't let it run cool for a short time untill it's broke-in.

ChuckW

Both the .46 and .55 AX are excellent and will power your SSE well. Personally, I would go with the .46 for a couple reasons. The first is prop clearance. The SSE has pretty short squatty gear. You'd want to change this with the .55 to avoid breaking props excessively since it seems to like larger ones than the .46. Second is flying style of the plane. This is just my opinion but I think the SSE is really fun with a high RPM engine. I flew mine with a Super Tigre .45 & Macs muffler. The thing screamed and flying was fun. Again, that's just my personal preference based on what I like. Other engines, including 4-strokes will fly the SSE great too. Some people even prefer them.

Whatever you choose, you will like. I own 2 .46-AX's, one .55-AX and I just got a .75-AX. They are by far the best all around engines that I have owned.

cymaz

Great feedback - thanks to you all.
I have replaced the landing gear with a carbon fibre one, this gives me plenty of room with an 11x6 prop. I take on board about the 46AX and might use an 11x7 or 11x8 ???????????

Any thoughts anyboby.

E-Mo

My Feedback: (12)

Try an APC 12.25 x 3.75 on your ax
I like this combo for sport flying

freakingfast

My Feedback: (3)

11X7 or 11X8 way too much for the 46, it's a rever. Try a 11.5 x4 APC ( for hovering) 11x5 APC ( a good sport) or 11x6 (S-2) Master Airscrew. The 55 likes 11x7 (S-2) Master Airscrew or 10x7 3 blade Master Airscrew.

Deadeye

I fly my SSE with a Saito 82 four stroke swinging a 15X4 APC wide blade. Unlimited vertical at 2/3 throttle. I used the Dubro 60 size 'Super strength' landing gear, and it fits this plane great.

I fly a OS FX 46 on a stick of mine. Swing a 14X4 APC on that one.

cymaz

Great feedback - thanks to all concerned. Its looking like a OS 46AX and 11X 4 prop. If I can get away with putting a larger tank in I will. The plans say a Du bro 8oz tank. I modified the build with an idea from a thread on this site and put on a tank hatch- so glad I did now. A 10oz Dubro tank fits a treat and I will try a 12oz, just because I like long flights.

freakingfast

My Feedback: (3)

You mean a 11.5 X4 or 12.25 x 3.75 on a 46ax 11x 4 is too light a load.

freakingfast

My Feedback: (3)

You should get about 8 minutes at WOT with 8 oz, (after it's broke-in) and a lot more if you are at half.

horace315

My Feedback: (15)

i have two of them and one has an irvine 53 the other i use a tt 46 pro i also used 12 oz tanks they fly 10 minutes with about less than 1/4 tank left.they both fly with plenty of power i think the irvine is a little better on vertical.i think this airplane would be fun to fly with even a 40 on it,i was shocked the first time i did a roll/rolls,it rolled 4 times before i could get my stick centered for the aileron.

cymaz

If anyonr is interested I have just bought an engine made by Just Engines here in the UK. I have bought a Leo .46 and several bits over the past couple of years and found their knowledge and service excellent.



The engine I have ordered is their modified J'En .57 in a .40 shell !! 1.8 bhp WOOOOOOOOOOOOO

Let me know what you think of the site http://www.justengines.co.uk/

CGRetired

My Feedback: (1)

Hey, cymaz, if it works, who can deny you your fun! Fly it and enjoy it.

zachmccool

At 5lb my Somethin Extra (kit) will hover with an 12X4 APC being turned by a OS 46 FX and has had flight times pushing 15 min!

cymaz

Just to let you all know I have managed to now squeeze a 12oz tank into my SSE. My wife is even impressed with that!!!!!!!!!!!!

CGRetired

My Feedback: (1)

Well, if SHE approves, then you're in high-cotton!! (that's a good thing)

troposcuba

got the .55ax in mine (its an ARF) with a 12 X 6 wood prop on it. of course like mrstang mentioned taller landing gear is necessary. he got his from me and i just happened to make myself another while i was at it. made em outta 7075 T-6 aluminum... so lighter and stronger than the stock gear. better all around. set up like this it will go straight up till i can't see it anymore. got lots of grunt at any speed. but the other side of that is i can cruise around just above idle and still have enough power to have fun and a tank seems to last forever that way. i never actually timed it though. I will put a stopwatch to it if our rainy weather clears up later today.

FLYBOY

My Feedback: (11)

55AX, you can power back if you need to, and you won't have to buy a bigger engine for the next plane. Same bolt pattern as I remember.

Mr67Stang

Your spinning a 12x6??? It's not a Piper Cub! C'mon drop a APC 13x4W on that and let me show you what it can do

zachmccool

cymaz
Is there any way that i can get the plans that u used? I disposed of the ones that can with the kit.

troposcuba

thought ya said it wasn't really a 3d plane. I'll pm ya the new plane i am gettin!