Thanks David. Looking forward to hearing your the flight report. My PC-21 should arrive tomorrow.

Kirk

Kirk,
Skymaster sent me a prop, but didn't send the other needed item. So PC-21 is on the shelf.

I only have two flights so far after switching (Post #20 and 33), but it does seem that it has a little more power. I will concede that I never got around to trying a different prop on the SPT, so not sure, but at the time I was going to try less prop, not more. I still need to get more flights, but that will not happen for awhile due to work, so I'm now waiting to hear other experiences. I also need to open some venting in the cowl area to help get more air movement in there.

For those interested, according to Aircraft International, Biela Propellers may have a 24x22 three-blade propeller available by the end of August. No pricing information was provided.

For anyone interested, just ordered the SEP 24x22 three-blade propeller from Vogelsang RC today. The prop was $140 +an additional $49 for shipping cost to Nashville, Tenn. This may be a good option for those of you still looking for a suitable propeller for your Kingtech 60 turbo prop engine. By the way, Vogelsang also provide me quote for a custom made five-blade propeller ( Ouch! )

But how cool would the five blade look lol

Yep, Got mine last Sat., but I'm right in the middle of a kitchen remodel and haven't had much time for anything else. I barely had a minute to open the box and take a peak, what a BEAUTY!!

Biela are making a 5-blade prop for Spt-5

Thanks for the info David. I have a 3 blade 22 inch solo prop with Corsair profile blades. I'm going to do initial runs with that prop. The pitch can be adjusted from 0 degrees to 24 degrees and the blades can be individually replaced.

Kirk

The Biela five-blade prop is 23x14, not enough pitch. According to the information I received from Aircraft International earlier this month, Biela Propellers may have something in the diameter and pitch needed for the K-60tp later this year.

Hey David will you have this ready for KY jets? I wouldn't mind taking a gander at it up close.

Hey Fenderbean,
I will be at KJ on the 3rd until the 6th. Plan to get the maiden flight on PC-21done on the 3rd before the crowd arrives.

Hi David & George they look great the props they are throwing are excellent I have Wren turbo props they will throw those blades but won't get the RPM.
I will be looking very closely to see if you have any problems with them KingTech are an excellent turbine there after sales service over here is excellent.

Hey t6racer,

I ran my K-60tp spinning the Fiala 24x17 three-blade prop yesterday. At roughly 75% throttle (147000 rpms shown on the ecu data terminal), the prop was spinning at roughly 5100 rpms. Though the max rpms for the Kingtech K-60tp is 160000, I think I will need to set the max rpms for the engine at 147000 to keep the prop at roughly 5000 rpms on the ground. This seems to be a powerful little engine and should spin a 24x20 three-blade prop easily. Looking forward to seeing how well and how fast it will fly my plane.

I will be there after that, I thought about doing that with my f-14 then coming back on the 8th.

Could someone measure the diameter of the spinner for the PC21 please? Thanks in advance!

Barry

Barry,

The diameter of the spinner back plate for the Pc-21 is 5 1/2 inches.

Oh c'mon David, stay an extra day! You can leave after I get there on the 7th.

Congrats, I was hoping you guys would have made it to Ms jets. I talked to Scott for a few, I need to come down and hang with you guys some.

Thanks David, I'm working with Robert at APC on a component propeller system.

I finally got some more flights with SEP 24/17/3 today, and am convinced this is just about the perfect prop for my aircraft. We also got a chance to tach it as well, and had 1260-1280 at idle and around 4860 at full throttle. That is just below the recommended 5000 RPM, but it gives great vertical performance with just the right amount of speed with zero "prop noise". I do have the stock prop that came with the kit which is a 27/14/3; and I may try the 27 if anything ever happens to this one, but I think I'm done looking for a prop at this point.

R/

Hey George,

Did you dial down the rpm on your engine. I have run a Fiala 24x17 three blade prop. With the engine at 147000 rpm (roughtly 3/4 throttle) my prop reached 5100 rpm . I may be wrong, but I believe at full engine rpm (160000), the prop will be well above 5500 rpm.

I placed an order for a SEP 24x22 three-blade prop through Vogelsang RC June 25. Should receive that prop by mid August. Will let you know how it works out.

Hey David,

I had turned it down initially with the first prop, but it's back to full with this one. Definitely keep us posted on what you get with the 24/22, if you're able to spin it faster than I, then I'll have to do some investigation.

With the Kingtech engine can you tell what RPM's the prop turns when unloaded in the air?

Mike,
From the information I have gotten from the folks at Kingtech, if the prop tach at 5000 rpms on the ground, it should unload to 7000 rpms in the air. The recommended prop to hit the sweet spot on the ground is a 24x20 three-blade. Maybe Barry can provide more information to better answer your question.