Bell 212
 

From the FAA accident summary for 31 Jan 2000.
B. Reg.No.: 212HQ M/M: BH12 Desc: 1974 BELL 212 HELICOPTER
Activity: Business Phase: Other GA-A/C: General Aviation
Descr: 1974 BELL 212 HELICOPTER WAS INVOLVED IN A SLING LOG LOADING OPERATION AND WAS LIFTING LOGS 150 FEET OFF THE GROUND WHEN THE MAIN ROTOR MAST BROKE, THE ACFT FELL 150 FEET TO THE GROUND AND SUSTAINED SUBSTANTIAL DAMAGE, OTHER CIRCUMSTANCES ARE UNKNOWN, MT. PLEASANT, UT.

WX: UNKN Damage: Substantial
C2. Injury Data: # Crew: 1 Fat: 0 Ser: 1 Min: 0 Unk:
# Pass: 0 Fat: 0 Ser: 0 Min: 0 Unk:
# Grnd: Fat: 0 Ser: 0 Min: 0 UNK:
D. Location City: MT. PLEASANT State: UT
E. Occ Date: 01/29/2000 Time: 20:30
F. Invest Coverage. IIC: MALMBORG Reg/DO: NM07 DO CTY: SALT LAKE CITY
DO State: UT Others: NTSB
G. Flt Handling. Dep Pt: MT. PLEASANT, UT Dep Date: 01/29/2000 Time:
Dest: UNKN Last Radio Cont: NONE Flt Plan: NONE
Last Clearance: NONE

Ooops!

remind me to stay below 150'

From the NTSB preliminary accident report.

NTSB Identification: DEN00LA045

Accident occurred JAN-29-00 at MT PLEASANT, UT
Aircraft: Bell 212, registration: N212HQ
Injuries: 1 Serious.

This is preliminary information, subject to change, and may contain errors. Any errors in this report will be corrected when the final report has been completed.

On January 29, 2000, at 1330 mountain standard time, a Bell 212 helicopter, N212HQ sustained substantial damage when it impacted the ground after the main rotor system separated from the aircraft during logging operations near Mount Pleasant, Utah. The commercial pilot and sole occupant received serious injuries. The flight was operating under Title 14 CFR Part 91 and no flight plan was filed. Visual meteorological conditions prevailed for this local area flight which departed Mount Pleasant earlier in the day. According to preliminary information, the original owner of the helicopter was the Peruvian Air Force, who listed the helicopter as being destroyed in 1976. It reappeared under the livery of Houston Helicopters and was listed by them as having been destroyed in 1981, It was listed by Heliqwest, the present operator, as having sustained damage when the main rotor contacted trees in 1997.

Bell 212 data
 

Just popped over from the Mil Forum, to see if any one can help me out.

Just been posted somewhere hot to fly 212's, and wondered if anyone knew where on the net I can get any info/Tech data/Flight reference cards/Etc.

Just like to be bit ahead of the game on the conversion.

Any help would be greatly appreciated.

Cheers
Luft

Get a back support cushion and some earplugs!

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If it was that good, everyone would be doing it.

A seat cushion will help too. I used a piece of sheepskin. I'm sure you can dye it green! I have loads of info on the 212 if you get stuck.

From the Bell Textron Website you can download the 212 technical brochure.

http://www.belltextron.com/products/...licopters/212/

Thanks so far.

Jed A1 - Tryed that site, Great......if you want to know what colours they come in, but thanks anyhow.

Army 427 - Will be in touch shortly by E mail, not only to find out what I can scrounge, but to work out who you are, sure I know you!?!?!?!

Anyone else who thinks they could help would also be welcome

Cheers
Luft

Give me an e-mail if you like, I may be able to send some groundschool notes and give general info (I'm a B212 TRE/IRE).

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Another day in paradise

BELL 212 PILOTS???
 

ANYONE OUT THERE CURRENT ON BELL 212 WHO WOULD GIVE ME SOME TECH INFO????

What would uou like to know?

1. What is beeper trim??

TR3,
there are two beeper trim mod states.

The standard Bell one is a single rocker swith on the collective which adjusts the N2 datum within a nominal 4% range (+/-2%). It energises a linear actuator which is connected in series with the droop compensation mechanism, so directly changing the settings on the N2 governors by the same degree.

Normally, the single engine beep range is 95-99%, and the twin beep from 97-101.5%. Normal power on range is 97-100%.

However, there is a high power mod state (TB138/145)which allows an increased take- off torque rating of 104.3% for 5 minutes. At this power the torque matching/sharing side of the torque control unit is not stable enough for it to be properly used. This is why the TCU normally limits torque to 102-104%; it improves stability. So, Bell isolate the torque sharing part of the TCU and add a separate N2 actuator for the number 2 engine and the rocker switch has a lateral movement added to it as well.

The pilot can then set a twin N2 datum and use the No2 engine beep to keep the torques matched at high settings.

Make sense? I hope that helps.

(Not sure what your background is, but you will find all turbine helicopters with a simple hydro-mechanical governing system use beepers)

[ 09 July 2001: Message edited by: 212man ]

Many thanx 212MAN much appreciated

2.Does the eng starter cut out automatically or is this done by the pilot? If so at what Ng or Nf does this occur?? 3. When do eng driven gens come on line???

The starter is taken out by the pilot at 55% Ng if my memory serves me and the gens are selected on at 80%.

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If it ain't broke........

Taff,

Your memory's pretty good on the 55% N1 figure for deselecting 'start'. We take the first engine up to 85% N2 (approx 83% N1) before selecting its gennie online; second engine is taken up to 71% before its generator goes on.

Same figures as us, the reason for the high Ng before generator selection is to reduce the torque shock loading and possibility of quill failure.

EXCELLENT STUFF FELLAS AND MUCH APPRECIATED...MANY THANX By the way...What is "quill failure"??

[ 10 July 2001: Message edited by: TR3 ]

What is it?? Noisy and potentially terminal.

There are a number of 'quills' on the Main Xmsn. The input quill which drives onto the Main bevel gear and the No.2 Hyd quill which is driven by it. Also the rotor brake quill if you have one fitted.

Then there's the T/R quill which comes off the sump case. The No.1 Hyd pump is driven from a quill of sorts on the RH side of the sump case and the Nr tacho gen is chain driven from that so it doesn't really qualify as a quill.

They are the only quills I can think of (unless you write with a feather that is).

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If it ain't broke..........