dmayman

5 ms·

1.
JetPack Aviation (YC W19) Is Hiring(ycombinator.com)
1 points by dmayman 3y ago
2.
JetPack Aviation (YC W19) Is Hiring(jetpackaviation.com)
1 points by dmayman 6y ago
3.
by dmayman 8y ago
We have great relationship with the FAA and our JB10 has been granted experimental certification.
4.
by dmayman 8y ago
EDFs are really power hungry beasts! You have to use them for takeoff and then transition onto a wing ASAP or you’ll be out of juice at 250w.h/kg No loiter time possible. The issue with folding wings is that they can big stability iss
5.
by dmayman 8y ago
Yes they are and it’s great but...it suffers the same limitations as any open rotor drone configuration, it’s really slow and really large
6.
by dmayman 8y ago
Fixed wing can glide, helicopters can autorotate, open rotor e-vtols don’t autorotate because they don’t have variable pitch blades and their inertia is way too low anyway. jet-vtols have no rotor blades at all so... you’re right if an e-vt
7.
by dmayman 8y ago
We use turbojets but are working on a 4:1 bypass ratio TF
8.
by dmayman 8y ago
We’re actively working with army, navy and marines in US. Why put a Blackhawk and crew at risk where one it a swarm of autonomous cargo Speeders can do same work. 400-600lbs cargo of equip, blood supplies etc. Not to be used for insertion o
9.
by dmayman 8y ago
Yes you are correct. We are also working on our turbofan. Way better sfc, quieter and cooler exhaust.
10.
by dmayman 8y ago
Every minute saved in reaching a stroke or heart attack victim reduces mortality by approx 10%. Worth fighting for?
11.
by dmayman 8y ago
If we can fly quickly AND safely and land within feet of an injured person and that makes a difference of them living or dying, isn’t that worth a shot?
12.
by dmayman 8y ago
We 100% agree and base level stablization is what we spend most of our engineering time on - both software and mech. We are learning a heck of a lot from our 1/3rd scale model
13.
by dmayman 8y ago
Depends on which aircraft but the JB11 is approx 110dba at 25ft
14.
by dmayman 8y ago
We are working also on micro turbo fans (<250lb thrust class). Current TBOs >250 hrs
15.
by dmayman 8y ago
The airflow works, we’ve modelled it. Pilot needs to wear similar jacket to current standard motorcycle jacket. No loose change in pockets
16.
by dmayman 8y ago
We were never part of the Martin JetPack project. Totally different tech.
17.
by dmayman 8y ago
Absolutely right
18.
by dmayman 8y ago
No we haven’t to 15k ft, we’ve modelled that. We’ve flown at approx 7k ft above mean sea level in alps
19.
by dmayman 8y ago
Our tech could not be more different to the MJP. Theirs was a gasoline engine powering a pair of ducted fans. Too many single points of failure and never able to keep the engine cool, not possible to fly much faster than 60mph. Ours is 1&#x
20.
by dmayman 8y ago
The safety system has to be integral with initial design and it is. Before these are used in urban environments the machine must be able to set itself down safely regardless of the failure. That is possible.
21.
by dmayman 8y ago
Thank you, yes we really are but it’s cool to do. We should achieve up to 30mins endurance with exiting engines and if we move to a turbofan than 2-3 x that is possible
22.
by dmayman 8y ago
We probably have the highest wing loading of any aircraft, therefore the impact of turbulence is much less than fixed wing or helicopter. The pilot has belly strap and lock holding them to vehicle unless they need to release in an emergency
23.
by dmayman 8y ago
Thank you!
24.
by dmayman 8y ago
The 1/3rd scale prototype is flying. In a number of ways what we’re doing is simpler than JA. We’re confident we can achieve our time goals.
25.
by dmayman 8y ago
We’ll count you in... in the future!
26.
by dmayman 8y ago
Hey maybe one day we can get it down to that kind of level
27.
by dmayman 8y ago
How do you do the economics on the value of the lives this can and will save?
28.
by dmayman 8y ago
Same way our jetpacks were accepted. Our stall speed is zero and with an engine out we can still control our flight path.
29.
by dmayman 8y ago
You bet. Thanks!
30.
by dmayman 8y ago
It’s not too different to riding a motorcycle. You can rest across the engine intake protection grills and not uncomfortable.

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