HSD 90 mm pro viper landing techniques ?
04-25-2016, 05:55 PM
#1
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HSD 90 mm pro viper landing techniques ?
Are ther any special techniques that would keep the jet from bouncing when landing. Balance is at the 100 mm from the leading edge as indicated in the assembly manual.
06-05-2016, 05:04 PM
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The trick with any jet is learning to land mains first with the nose up to get some dynamic braking.
For this model, after coming off the final turn Id get the model leveled out by using some up elevator to maintain pitch and using throttle to maintain a constant decent rate.
If this is maintained till touchdown I'd get a three point landing but thats not what Id shoot for.
So when the model is about 1 wingspan off the ground I'd start pulling a little more elevator to get the nose up a few degrees.
Dont wait till the model is in ground effect (about half wingspan) to the get the nose up because the extra lift usually creates unwanted ballooning.
Leave yourself a couple of go-arounds and anytime you get ballooning go around. An approach with ballooning at some point can be very hard to save depending on the model.
Good luck.
For this model, after coming off the final turn Id get the model leveled out by using some up elevator to maintain pitch and using throttle to maintain a constant decent rate.
If this is maintained till touchdown I'd get a three point landing but thats not what Id shoot for.
So when the model is about 1 wingspan off the ground I'd start pulling a little more elevator to get the nose up a few degrees.
Dont wait till the model is in ground effect (about half wingspan) to the get the nose up because the extra lift usually creates unwanted ballooning.
Leave yourself a couple of go-arounds and anytime you get ballooning go around. An approach with ballooning at some point can be very hard to save depending on the model.
Good luck.
06-22-2016, 12:13 PM
#5
I don't know if yours does this, but mine does...
When you are in a flared approach, and you cut power, the nose immediately drops. Even if it is from 5% throttle to 0%.
I think it has something to do with the top cheater hole making lift over the fuselage.
Anyways, I just keep very light throttle on all the way down and land it with a flare. I don't cut throttle until after mains touch down.
When you are in a flared approach, and you cut power, the nose immediately drops. Even if it is from 5% throttle to 0%.
I think it has something to do with the top cheater hole making lift over the fuselage.
Anyways, I just keep very light throttle on all the way down and land it with a flare. I don't cut throttle until after mains touch down.
06-23-2016, 05:56 AM
#7
It does the same thing regardless of the speed, and there is no issues with cg in normal flying.
It's a CG issue, but not something you can fix. The center of lift of the airplane will shift when the motor is cut, due to the top cheater
It's a CG issue, but not something you can fix. The center of lift of the airplane will shift when the motor is cut, due to the top cheater
07-02-2016, 03:59 PM
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You are right Bandetx, using a little throttle makes all the difference in controllability on this model and many other jets of this design. It takes more experience to "fly" the model in so ignore the trolls.
07-04-2016, 04:53 PM
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