Aux power - thrust

[rzbill]

I was thinking about the fuel scaling problem when watching the UK video. I wonder if that was about the limit of his fuel. Fun toy but that's all maybe.

[Steve Melton]

it seems they also have a model rated at 88 lbs thrust. what if it could run on 100LL so no additional fuel needed except maybe some oil to mix inline. estimate complete weight of mounted unit = 15 lb. minimal drag of unit with bullet nose cone and trail cone that are jettisoned prior to start, about the same drag of a external mounted camera. example, you're over lake Michigan and don't want to get your feet wet if you have an engine out. I believe 88 lbs thrust could sustain flight in a 9A in ground effect.

[SvingenB]

The Cri Cri

http://www.youtube.com/watch?v=7Y-AL3YfWzM

[Mike S]

There was an airshow act with a couple of small turbines mounted in the wing tips, saw it at and airshow at Lake Tahoe about 10 years ago.

The main reason for the tip mounting was smoke generation as I recall, but he could also taxi with just them----------was funny to see him land, shut off the engine, and continue to taxi on to the parking area with the prop stopped.

I think the plane was a Giles or a One Design?? I have no idea if he is still performing with this setup.

[Steve Melton]

mounting two of them, one in each wing tip, could be an option because you could fair them in nicely with the wing tip but may suffer from asymmetric thrust if one failed. what about one turbine mounted as far aft as reasonable in the center so the thrust is in line and no occupants are in the rotor burst zone?

[Neal@F14]

It would be kinda neat to have a few extra pounds of thrust available for augmenting takeoff from short, backcountry airstrips with high density altitude. That would truly be "JATO".

[Lindamon]

http://www.aero-news.net/index.cfm?d...4-18754f671301

Good question on whether a type rating is necessary, I don't know if Jimmy Franklin had one or not. I will ask John next chance I get.

[az_gila]

Originally Posted by John Clark

A type rating is required in a specific make and model of aircraft if the aircraft weighs more than 12,500 lb (5,700 kg) at takeoff or is powered by one or more turbojet engines.

Might make for an interesting discussion with the FAA.

John Clark ATP, CFI
FAAST Team Representative
EAA Flight Advisor
RV8 N18U "Sunshine"
KSBA

Is that true if it is a motor glider?

IIRC at least 4 of these 220 lb thrust Caproni A-21-SJ sailplanes were imported to the US.

http://www.sailplanedirectory.com/Pl...fm?planeID=413

[Bill_H]

Does the phrase "or is powered by one or more turbojet engines" mean "powered ONLY by one or more turbojet engines"? Because I don't remember reading the the Waco biplane with the normal radial PLUS the bottom-mounted jet needed a type rating. (Maybe multi-engine centerline thrust?)

[Steve Melton]

perhaps this application could be classified as either motor glider for engine out condition or thrust augmentation on center line. the first application for safety the second for performance. hopefully, a turbine rating is not required.