I'm trying to find a good prop for TR my stick, any one have good results with 11x8 for bigger? My plane is around 5.5-6lb or so.

APC 12.25-3.75

I allways liked the apc 12 x 4 on mine. It spins up faster

13x4 also looks good.

As the guys say try the 12x4 and the 12.25x3.75 - good spool up time for TRs lots of thrust in the hover.

I use 13x4 for my irvine 53/flip 3D, Great combo!

Sportive, which brand 13x4? Graupner?

No, 13x4 APC hover my flip at 1/2 trottle !!

The Irvine must be a powerhouse to swing the 13x4 with ease.

It will swing it ok, but I prefer the 12x4 as the spool up is faster, esp as the throttle response is good. I guess its down to what you prefer and how you fly.........

Andy

Hercmate,
Which 12x4 do you use?

Wade

Wade,

I mostly use APC's as they're quiet and produce good thrust, but I also use wooden Zinger and Precedent props including the 12x4. Only trouble is they're fragile and I break loads of them - my LHS loves me! Why d'you ask?

Andy

Hercmate,
Just curious since I traded for a 53, haven't received it yet.

Cool, you'll like it - just make sure you ALWAYS use afterrun oil at the end of every flying session, I trashed the bearings in mine after a very short time!

Andy

Ok thanks

The irvine is sweet!

With the APC 12.25-3.75 the engine held my h9 ultra stick in a hover @ 3/4 throttle over 5800 feet fo elevation. This plan is a PIG! over 6lb. the funny thing is, It died today when a snaproll brokeoff the elevator and it went in from 75'
Good thing it's been raining for the last three days, the engines fine! but I dug it out of a 6" hole in the ground mostly wood chips.

Hercmate,
Does your APC 12x4 have the thin tips? I have one and the tips are tapered very thin, as opposed to the 12.25x3.75 or 11.5x4. Does APC make more than one "style" of 12x4?
Thanks

Both the 13x4 and 12.75x3.75 are really noisy though. They do not put much load on the irvine 53 so they get a lot of tip speed noise. They are the best props for 3d-You get the most staic thrust out of them. They also generate a large braking effect at idle so you can do steep aproaches.Use them as long as you don't mind getting infrequent winging complaints from other modellers(especially the scale and warbirders) about the noise! The irvine will also turn 12x6, 12.5x6 and 13x6!
It incredibly robust though. I have had some absolutely dust raising crashes with mine and it still runs absolutely fine with no damage sustained!
Luke