Quest for the 100MPH Plane
Damage | Posted on Thursday, October 8, 2015 at 09:55PM I feel the need, the need for speed. I am currently working on a 100+ MPH HobbyKing radjet. I am not quite there yet, but feel I am well on the way. Here is the current state of things. Below is a video from FPV Fest where I clocked it at about 75MPH..
How am I going to break 100MPH? Bigger motors and bigger batteries of course!
First off, some data (click the chart to open a larger version)...
;)
The data in orange is what I was running in the video you just watched, the data in yellow is what I plan on running. Notice nearly twice the thrust!
Here is a better comparison of the two options...
Notice a few things...
- nearly 3 times the amp draw
- the prop speed is up to 164MPH from 97MPH
- applying my actual losses I estimate the plane will go 125MPH
of course, I figure that losses probably are logrithmic not linear, so the diminishing returns from actual losses due to more weight might be a bit more, however I still feel pretty confident I can break 100. The batteries are going to take some punishment. I am going to need to run a 50C 1600MAH with an 80AMP ESC. Stay Tuned!
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