fred685

My Feedback: (67)

Had a Stalker radar gun the other day at the field. Pretty disappointing to see how fast your actually going. My Patriot is built stock without fake intakes. Has a Jett 50 APC 9-9 prop and Spring-air retracts. Of course the air manifold started leaking at the field so all readings were with the wheels down. The fastest reading I got was 134 MPH. That was from a big dive. I tried a 9-7.5 APC and lost speed. What was disappointing was some 35% aerobatic airplanes were clocked in the mid 120's. The only other speed type plane clocked that day was a Diamond Dust with an MVVS 40 and some sort of APC pylon prop. He only got 125, so I didnt feel to bad. I'll fix the manifold and get some numbers with the wheels up.

Fred

bob27s

My Feedback: (19)

Thats not all that bad Fred..........

With the gear up, you will likely find something along the lines of 130 mph in level flight. The Patriot is a big plane, and it takes a lot to get it to move a whole lot faster than that.... but generally, with a 50 installed, the top end is rarely much over 140 mph.

The 9x9 is a bit heavy for the SJ-50. Try an APC 9x8 next time out. Let the engine unload. You want to prop it so it turns over 17,000 rpm peak on the ground, then back off 600-800 rpm before launch.

Bob

daven

My Feedback: (1)

I would suggest trying a 10x7 sport prop. Works well on my SJ .50 powered Kyosho Spitfire. It was faster than all the 9" props I tried, and I have a lot of them.

CFII1974

My Feedback: (5)

Fred,
Those readings are not that far off. The fastest I have ever had mine clocked was 154 and that is with a west .50 v1 and pipe, turning a 9X8 APC gear up. With my Jett .50 I was never getting much more then low 140's That is the same engine that pulled my Magnum to 188. I plan on getting my new Magnum R clocked this weekend. It is good to have friends that are cops with radar guns.

Dave

bob27s

My Feedback: (19)

good call Dave.....

I forgot about that. For some reason, the APC 10x7 seems to turn up nearly as well at a 10x6...... pulls hard when it unloads in the air.

If I ever manage to get my ARF patriot built, I am going to try and install the full size pipe on the SJ-50. Should be able to match the West performance with the pipe.

Razor-RCU

My Feedback: (50)

I really liked the 9x9 on my Pat. (Jett-50 SPring airs etc.) better than the 9x8 or 10x7 apc

I have a Jett-50 going on my Patriot arf we'll see what happens-