220mph Proximity

[ched]

The release would be a great thing to capture on video. Just like when they release missiles from plane wings. They drop then accelerate........
Looking forward to seeing your flights, thanks.

As they say it's not speed that kills it's the sudden stop..

[omegooliebird]

Got hold of a big hex for a fair price.. Must have cost a fortune new, but times change..

Easily big enough to do the job, probably lift 6-8kg.. Need to fully rewire it and check EVERYTHING, but progress.. progress..

[omegooliebird]

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[omegooliebird]

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[omegooliebird]

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[ched]

Looks a good fit. Cheers for posting.

[omegooliebird]

Thanks for being interested enough to comment Ched!! It is you, and those that comment and make suggestions whom I post these things for!

[Shikra]

#guilty of following but not commenting  ^-^

[FPVSteve]

Wont you waste a ton of fuel at idle while the Hex climbs? Might be worthwhile making a kickass catapult instead and just launching from the ground?

[omegooliebird]

That is actually the plan...the plane will never land safely at it's fully fueled weight of 2.1kg, it would stall at around 70-80mph. So if it were to suffer a flame-out coming off a catapult, i would have no time to set up a landing, and given the landing speed, that would be the end. I also wouldnt like to catapult with a half empty tank to get the weight down, because of the slosh. So the idea with the hex is that it will burn some fuel (200g) on the way up, and shouldn't have the sudden g force associated with a catapult so is less likely to flame-out. Also, from the height we will release, there will be time to plan an approach and get it down on the anticipated strip even if it does have engine problems.

[atomiclama]

A jet plane being dropped from a big hex what could possible go wrong  :o ;D

Bucking Frilliant I can't wait to see this in action.

[atomiclama]

#guilty of following but not commenting  ^-^

Me too, but this.... well... words fail.

[ched]

Thanks for being interested enough to comment Ched!! It is you, and those that comment and make suggestions whom I post these things for!

The reason I posted was that I was very interested in your project.
I worked for many years on developing jets, gas turbines, and all the control and instrumentation systems. So I have a slight understanding of these things, so seeing someone put one in a model is just great.
The technology has come on hugely but the skill is in putting it all together. It's not like there are thousands of people doing this to share the info.

I love that you are putting things together and showing us as you progress. It's a great project to watch progress, thanks for posting it and good luck.

[FPVSteve]

That is actually the plan...the plane will never land safely at it's fully fueled weight of 2.1kg, it would stall at around 70-80mph. So if it were to suffer a flame-out coming off a catapult, i would have no time to set up a landing, and given the landing speed, that would be the end. I also wouldnt like to catapult with a half empty tank to get the weight down, because of the slosh. So the idea with the hex is that it will burn some fuel (200g) on the way up, and shouldn't have the sudden g force associated with a catapult so is less likely to flame-out. Also, from the height we will release, there will be time to plan an approach and get it down on the anticipated strip even if it does have engine problems.

Loud and clear - great answer actually!

[FPVSteve]

+1 ched