I'm trying to decide on a prop, but really have zero experience or knowledge. What are people using on the 912is?
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I'm trying to decide on a prop, but really have zero experience or knowledge. What are people using on the 912is?
Try searching on this forum, this topic has been discussed several times.
It seems the factory uses the Whirlwind so that's what I bought. I have the Cruise prop.
The Airmaster propeller would be the best you could put on it. Around $11000 CA.
I have the 912is sport, Airmaster and 75", Airmaster ( whirlwind) 3 blade prop. I like it. John M will probably tell it should be the 72".
If not using the Airmaster I think the 72".
r
whirl wind RZ3
Awesome. Thanks for the info. I neglected to come back to this topic, but it's something I've been looking at a lot the last week. Currently I really like the Airmaster AP332CTF-WWR70Z. I eventually plan on having floats, so this, with it's reversing option would be ideal (i think).
It's a lot more money than I originally expected to spend on a prop, but i think the long term (and short term) advantage will be well worth it.
I have been looking to price these CS props but haven’t been able to find prices? Why is that? I found a distributor but of course no price.
Just email Airmaster with your details and they will provide a quote. They are a very good company to deal with in my experience.
FWIW my set up (CS unit and 75"blades was about $Aus10k (3 years ago)
cheers
ross
$13200 New Zealand dollars for the 3 blade feathering 70" whirlwind w blades.
Its another 500 for the beta reversing option.
It's a lot of dollars in any currency.
yeah it is. thanks
Can't you buy an Airmaster though John and Debra?
You probably can purchase through Kitfox. I was just curious after flying 12 hours with one at Stick & Rudder. I was surfing the net while John and Debra were likely asleep.
As for the friends airplane, the fixed pitch props were probably cruise props and comparing cruise setting on the CS to a fixed cruise prop you would not expect to flind an advantage. Try comparing take off and climb settings of the CS to that fixed prop. I bet its no comparison. These Airmasters are sweet.
Eddie
The Airmaster provides the most efficient use of the engine's power, through all phases of flight.
I can personally attest to the superior performance of the Airmaster CS prop on a Kitfox SS7. Airfox and Floog both have Kitfox SS7 with 912uls same as my SS7. We all 3 finished our Foxes and started flying about the same time. We all 3 fly together every now and then. The only differences in our 3 aircraft are: Airfox and Floog both have the Airmaster CS prop with Whirlwind blades; I have the Whirlwind fixed pitch (ground adjustable) prop with the same blades as they do. My prop is adjusted for a compromise between climb and cruise-slightly favoring climb performance. Floog and I have the same tires (Desser 8.5x6) and Airfox has the 26" Airstreaks. Whenever we fly together I am constantly astounded by their superior performance in ALL phases of flight. They noticeably outclimb me on T/O and cruise about 20-25 mph faster at the same engine rpm and with lower fuel consumption. On landing approach they can come in steeper than I because of the better braking effect of the idling prop at fine pitch. If you can afford it, I am convinced a CS prop is the best and most effective thing you can do to a Kitfox to utilize its total performance envelope. These comparisons I have made are side-by-side and as apples-to-apples as you can get and the difference is HUGE.
Airfox and Floog have gone on and installed aftermarket EFI on their 912uls engines to further improve fuel economy, smooth running, etc. But the comparisons I refer to above were made prior to the EFI installation, when all 3 of our engines were identical.
Awesome comparison write up Jim.
Don't get me wrong; I love my Kitfox with its fixed pitch prop. It has all the performance I will ever need, plus it keeps me in the Light Sport category and affordability where I need to be. However, this still does not detract from the awesome performance that can be had with the Airmaster.
The usual propeller weighs about 4.5 kg. How much does the variable pitch propeller weigh? What balancing is compensated for?
I don't know the answer to the weight question, but I do know that the Whirlwind blades are the same as mine except for the stubs that go into the hub. Actually a little more weight up front is good for the Kitfox SS7 because it tends to be a little tail heavy (rear CG). The prop and rotating parts can be balanced like any other prop.
Clear.
I meant the balancing of the aircraft - the compensation of the weight of the hub.
For those that are interested, The WW 70 inch prop weighs 12 lbs. The Airmaster with 70 inch WW blades weighs 25 lbs with spinner. So it's a 12-13 lb difference.