Hughes XH-17 tip jet flying crane. A Frankenstein's monster of aircraft parts and a 134 ft long rotor blade. : r/WeirdWings
Hughes Model 385 / XV-9A "Hot Cycle" helicopter - development history, photos, technical data
What Are Tip Jet Helicopters? | Flite Test
Clawjet Helicopter Design (low-friction bearings needed) - KSP1 The Spacecraft Exchange - Kerbal Space Program Forums
NHI H-3 Kolibrie - Wikipedia
Why are tip jet helicopters so rare, even though it doesn't seem very complex and would work fine with current engines, like turbines or any kind of compressor? - Quora
Tip-jet UAV Unveiled by Unmanned Systems | Defense News: Aviation International News
Unmanned Systems Unveils the Orca Tip-jet UAV at Dubai 2012 - Defense Update:
TIP JET Helicopter Mk1 (Will it fly?) - YouTube
Tip jet - Wikipedia
Blog :: Vertical Magazine News :: Vertical rewind: Tip-powered pioneer
What Are Tip Jet Helicopters? | Flite Test
Aerospaceweb.org | Ask Us - Tip-Jet Rotor Helicopters