Farm tractors, helicopters, they are both the same thing. They both are used outside and have a loud motor.Originally Posted by KJ6BSO
Farm tractors, helicopters, they are both the same thing. They both are used outside and have a loud motor.
"Friendships come in strange packages
The best ones are opened with a smile"
NA4BH '15
It must be an exclusive to Cowthief's pink helicopters.
Encrypt everything. Even if you have nothing to hide. It increases the noise floor.
Rudy, did you by any chance mean the Boeing CH-47 helicopter rather than the Bell 47?
All the world’s a stage, but obviously the play is unrehearsed and everybody is ad-libbing his lines. Maybe that’s why it’s hard to tell if we’re living in a tragedy or a farce.
Hello.
The original Bell 47 was equipped with a Franklin O-335 or 6AC engine.
This was equipped with a 22 amp 6 volt generator.
Now look up the power requirements for radio(s) that were fitted to the military helicopters in that era.
http://en.wikipedia.org/wiki/Franklin_O-335
http://en.wikipedia.org/wiki/AN/ARC-5
Now look at the original operations manual for the Bell 47, available at the Bell website.
http://www.bellhelicopter.textron.com/en/index.cfm
In order to Transmit the RADIO GENSET MUST BE OPERATING.
Can't find the manual at the Bell Web site, Rudy. Since you've already downloaded it, can you give me a direct URL?
All the world’s a stage, but obviously the play is unrehearsed and everybody is ad-libbing his lines. Maybe that’s why it’s hard to tell if we’re living in a tragedy or a farce.
Thats because Bell no longer supports that particular series.
I keep my 2 feet on the ground, and my head in the twilight zone.
Is this what it goes in?
"Friendships come in strange packages
The best ones are opened with a smile"
NA4BH '15
I can find no evidence of any APU on a Bell 47, not even on the experimental HX-13F fitted with a French turbine. The CH-47 Chinook, however, does have an APU. In so far as running radios is concerned, I know of no aircraft that ever needed to continue to run an APU (as a normal function) in order to utilize the communications (or other avionics) fitted to that aircraft. The APU is solely used as a battery replacement for those operations that would put an excessive strain on the normal batteries. Most aircraft depend upon ground power while on the ground -- this is sometimes in the form of an APU on wheels like a generator that is plugged into the aircraft and switches over the onboard electrical systems to the external source. The internal APU is started so that the external power source may be disconnected and the engines started so that the aircraft's generators may be brought on line. Once that is done, the APU is shut down.
I would be very happy to see some source of authority citing this mythical APU on the very small, two-seat Bell H-47.
Simple answer. there is / never was an on board APU on a model 47. However, as you pointed out, it is possible to employ an APU on wheels while on the ground/ Like the one that is being used to start up this bell-47 while on the ground.
Last edited by n2ize; 11-04-2010 at 08:59 PM.
I keep my 2 feet on the ground, and my head in the twilight zone.
Man, I'm not sure how comfortable I'd be flying that chopper after a start like that.
All the world’s a stage, but obviously the play is unrehearsed and everybody is ad-libbing his lines. Maybe that’s why it’s hard to tell if we’re living in a tragedy or a farce.
Posting Permissions
Reply With Quote