Extreme Flight 74" Laser

[gyro]

Yes. It is a go pro strapped to my head. Nick is the other guy I am talking to. In the the third flight he is flying his nitro .50 heli.

I especially like where at 2:25 on flight 3 where I do some waterfalls, and some pretty extreme loops. My kind of plane. Insane pitch authority.

So Matt, what are your thoughts on the plane thus far aside from the pitch?

 

[Enterprise]

There is a lot going on with learning a new radio, new engine, new setup with the pipe, so I stuck to mostly stuff that involved keeping the throttle up. I tried a few snaps and I clearly don't have the rates setup correct for that. Maybe it is just the time I have spent with the new AJ Lasers as they excel at this. It is clearly fast and will have a ton of energy for XA.

I did not have the scale with me so no exact weight. It should have come out around 13 pounds. 7650 RPM on the Vess 20B on it.

I did not see any bad habits and it did feel similar to the 60" version, but I did not fly this like the 60" as I just don't have the confidence in the motor yet. I did not setup a idle down so on both flights 2 and 3 I just killed the motor to stop it from going and going. I need a idle down mix. The one bad thing about the Jeti is that the trims are just plain stupid. There is a cool auto trim function for the flight surfaces, but the throttle is a PIA to get to when flying.

 

[gyro]

There is a lot going on with learning a new radio, new engine, new setup with the pipe, so I stuck to mostly stuff that involved keeping the throttle up. I tried a few snaps and I clearly don't have the rates setup correct for that. Maybe it is just the time I have spent with the new AJ Lasers as they excel at this. It is clearly fast and will have a ton of energy for XA.

I did not have the scale with me so no exact weight. It should have come out around 13 pounds. 7650 RPM on the Vess 20B on it.

I did not see any bad habits and it did feel similar to the 60" version, but I did not fly this like the 60" as I just don't have the confidence in the motor yet. I did not setup a idle down so on both flights 2 and 3 I just killed the motor to stop it from going and going. I need a idle down mix. The one bad thing about the Jeti is that the trims are just plain stupid. There is a cool auto trim function for the flight surfaces, but the throttle is a PIA to get to when flying.

Is that RPM in flight or static?

 

[Ohio AV8TOR]

Is that RPM in flight or static?

Great question

 

[Enterprise]

Static. I don't know how to setup RPM telemetry from a DA ignition system. I can get a optical sensor. It has to be over 8k in flight as it unloads. The same prop does 7000-7200 static on my VVRC-40s depending on the day and tuning.

 

[gyro]

Static. I don't know how to setup RPM telemetry from a DA ignition system. I can get a optical sensor. It has to be over 8k in flight as it unloads. The same prop does 7000-7200 static on my VVRC-40s depending on the day and tuning.

Wow, 7600 static is nice

I suppose I need to tach my 20x9 falcon and see where it's at. [MENTION=14]hone1er[/MENTION] what rpm are you getting?

 

[hone]

Wow, 7600 static is nice

I suppose I need to tach my 20x9 falcon and see where it's at. [MENTION=14]hone1er[/MENTION] what rpm are you getting?

7460rpm with Jtec pitts muffler and 20x9.

7600 with the 20b is fantastic. Got me thinking about the tuned pipe again.

 

[Ohio AV8TOR]

7460rpm with Jtec pitts muffler and 20x9.

7600 with the 20b is fantastic. Got me thinking about the tuned pipe again.

So I admit that I am not as serious as you guys for having the absolute max power and I agree that the DA is more powerful than the VVRC 40. But is gaining 140 rpm's switching to a tuned pipe really worth it? I may be wrong also in what I just did but I ran in Jim's PropEngine a 20b (at 10 pitch) and tweaked the Kv to get as close as I could to your rpm's. To me switching from the Pitts to a tuned pipe is only a 1.4 mph gain and is actually 0.37 lbs of thrust less. I am not sure I understand how the thrust comes out less nor if I am using this calculator right. But if I am is the cost and frustration of the tuned pipe really worth it or what else am I missing?

 

[hone]

With the 20x9 Alan was getting a little over 7800rpm to get a better comparison to my 7460.
In the calculator it looks like you used 10 pitch for both props? I think the Prop K value needs slight adjustment too (1.05 for carbon 1.04 for Vess wood)

I was more thinking about how much I loved the 20b on the Extra at 6900rpm with the 40cc and how 7600 compares to that.

It's looking like the pipe actually provides a 300-400 rpm boost on the same prop as the pitts.

 

[Ohio AV8TOR]

With the 20x9 Alan was getting a little over 7800rpm to get a better comparison to my 7460.
In the calculator it looks like you used 10 pitch for both props? I think the Prop K value needs slight adjustment too (1.05 for carbon 1.04 for Vess wood)

I was more thinking about how much I loved the 20b on the Extra at 6900rpm with the 40cc and how 7600 compares to that.

It's looking like the pipe actually provides a 300-400 rpm boost on the same prop as the pitts.

My bad Joe I looked to quick at yours and thought that was on a 20B as well, so there is a 1.98 pounds thrust and 8.47mph advantage.