Beefmoney
Topic Author
Posts: 1065
Joined: Tue Oct 10, 2000 2:16 am

Diamond Katana Propeller Problem?

Fri Feb 01, 2002 1:44 pm


Click for large version
Click here for full size photo!

Photo © James Richard Covington, Jr




Hey everybody,
I was looking through the FAA incident database, and I saw this exact aircraft has had three incidents in the last 3 years, the first occured in July 1999. The pilot was in cruise and he experience severe engine vibration, so he powered back and there was no decrease in vibration. Soon after that the propeller departed the airframe! the second incident in January 2001 was a hard landing that bent the gear, firewall, etc.... And the third incident occured in August of 2001, where the pilot was climbing out of Glendale, AZ and he experienced vibrations and, again, the propeller left the body. Now, is this somthing that the Katana has been designed to do in "response" to extreme vibration, or is this a very weak prop? Also, in both of the incidents where the prop left, the pilot was able to land in the desert with no injuries.

Michael Hawkins KPHX/DVT
 
User avatar
wjv04
Posts: 547
Joined: Sat Jun 23, 2001 12:18 pm

RE: Diamond Katana Propeller Problem?

Fri Feb 01, 2002 2:22 pm

I dunno, but i fly the DA-20 A-1 and ive never experienced vibration at all
 
Beefmoney
Topic Author
Posts: 1065
Joined: Tue Oct 10, 2000 2:16 am

RE: Diamond Katana Propeller Problem?

Sat Feb 02, 2002 7:46 am

Does anyone have anymore info on this? Im really interested
 
CX747
Posts: 5576
Joined: Tue May 18, 1999 2:54 am

RE: Diamond Katana Propeller Problem?

Sat Feb 02, 2002 7:53 am

The flight school that I work at has several Katanas, and besides the fact that their propellers are wooden and not metal, there have been very few problems. One just needs to look after them a bit more than other aircrafts.
"History does not long entrust the care of freedom to the weak or timid." D. Eisenhower
 
slawko
Posts: 3742
Joined: Tue May 25, 1999 7:40 am

RE: Diamond Katana Propeller Problem?

Sat Feb 02, 2002 9:04 am

Sounds like this plane may just be a lemon...I have flow the katana for a few years and I have never had any problems with it...
"Clive Beddoe says he favours competition, but his actions do not support that idea." Robert Milton - CEO Air Canada
 
captaingomes
Posts: 6251
Joined: Tue Feb 13, 2001 1:33 am

RE: Diamond Katana Propeller Problem?

Sat Feb 02, 2002 9:07 am

I do not personally fly the Katana, and I think it is a cool airplane. But I do know people who used to train on the Katana and have stories to tell me about it. Mind you, the flight school these people went to had early production Katana's and maybe the problems they were having were because it was a new design.
"it's kind of like an Airbus, it's an engineering marvel, but there's no sense of passion" -- J. Clarkson re: Coxster
 
sushka
Posts: 4657
Joined: Thu Nov 18, 1999 12:33 am

RE: Diamond Katana Propeller Problem?

Sat Feb 02, 2002 9:12 am

I fly the Katana at my flight school and love it!! I have experienced no problems with them. Personally I think Cessnas are the planes that people should be afraid of.
Pershoyu Spravoyu Litaki!
 
CX747
Posts: 5576
Joined: Tue May 18, 1999 2:54 am

RE: Diamond Katana Propeller Problem?

Sat Feb 02, 2002 9:21 am

Early production Katana's have had their fare share of problems. The Rotax engine was a detriment to the aircraft and was only used in the A-1 model which is no longer produced. Production has now shifted to the C-1 with a much stronger engine. Unfortunately, the school I work for does not operate that model. I believe that it has a Lycoming though.
"History does not long entrust the care of freedom to the weak or timid." D. Eisenhower
 
Guest

RE: Diamond Katana Propeller Problem?

Sat Feb 02, 2002 10:02 am

Friends don't let friends fly fiberglass.
Iain
 
captaingomes
Posts: 6251
Joined: Tue Feb 13, 2001 1:33 am

RE: Diamond Katana Propeller Problem?

Sat Feb 02, 2002 10:09 am

I was told the airframe is just two parts, glued together! Wow. If that's the case, pretty amazing. I hope they have ways of knowing if it's coming apart.

hehehe.

It is a cool airplane though, and lots of fun to fly. I love its nickname too, "the flying sperm" because of its shape. HAHAHA.
"it's kind of like an Airbus, it's an engineering marvel, but there's no sense of passion" -- J. Clarkson re: Coxster
 
CX747
Posts: 5576
Joined: Tue May 18, 1999 2:54 am

RE: Diamond Katana Propeller Problem?

Wed Feb 06, 2002 6:37 am

Yes, sometimes its call sign is the "Flying Sperm", although that nickname is not normally used around customers, especially if they are female! There are ways to test the fiberglass body, and yes, it is held together by glue, albeit extremely strong glue!
"History does not long entrust the care of freedom to the weak or timid." D. Eisenhower
 
captaingomes
Posts: 6251
Joined: Tue Feb 13, 2001 1:33 am

RE: Diamond Katana Propeller Problem?

Wed Feb 06, 2002 7:09 am

I don't want to knock fiberglass, composite construction, glues, etc. But what worries me is this. Modern airliners are increasingly making use of high tech composites, etc. While I have nothing against that, trully, there are things to consider. The more high tech you get, and the more exotic the materials become, the higher the maintenance, as well as some risks involved.

How does somebody who owns a Katana know that the airplane is still fine 20, 30 or 40 years in the future? It is much easier to see if all the nuts and bolts are alright, and if the metal skin is in good shape. Much less so with the glue and the fiberglass or composites. That worries me.

If one day, hypothetically speaking, I own a private aircraft, I will likely opt for a fairly basic, robust metal aircraft due to its simplicity and ease of maintenance.
"it's kind of like an Airbus, it's an engineering marvel, but there's no sense of passion" -- J. Clarkson re: Coxster
 
sharpnfuzzy
Posts: 557
Joined: Fri Jun 22, 2001 2:24 pm

RE: Diamond Katana Propeller Problem?

Wed Feb 06, 2002 8:05 am

Back when my father used to work for Diamond he told me a story about the plant recieving a letter from a very greatful customer who clipped a snow bank with his wing on approach. The guy said that if he was flying any other plane he probably wouldn't have made it, or atleast came out with some severe injuries. He said that it was probably because the plane is made of only 2 pieces that it stayed together, and didn't disintegrate.

i can't confirm this story though....

I also got to put the rudder on one of the planes in the factory, so i hope there haven't been any incidents of rudders flying off these little guys.

 
Inbound
Posts: 614
Joined: Sat Sep 15, 2001 7:59 am

RE: Diamond Katana Propeller Problem?

Wed Feb 06, 2002 10:41 am

KRAP - TANA
that's all I have to say.
never felt unsafe in anything before, until I flew one of these.
stick with the 172, it's tried and proven.
Maintain own separation with terrain!
 
captaingomes
Posts: 6251
Joined: Tue Feb 13, 2001 1:33 am

RE: Diamond Katana Propeller Problem?

Wed Feb 06, 2002 12:48 pm

I've flown the Katana once, and thought it was extremely nice. Not unsafe at all. It was fun to fly. However, I do think for my hypothetical money, I'd rather buy a new 172, but I wouldn't ignore a Katana.
"it's kind of like an Airbus, it's an engineering marvel, but there's no sense of passion" -- J. Clarkson re: Coxster
 
CX747
Posts: 5576
Joined: Tue May 18, 1999 2:54 am

Captaingomes

Fri Feb 08, 2002 1:34 am

Their has been many a discussion about the Katana as we stand on the ramp watching taxi by. Your concerns have been voiced by both the flyers and fixers. or the most part, we use it for first flights and other intro programs. While I personally don't have anything against it, I do prefer to fly the 172s over it.
"History does not long entrust the care of freedom to the weak or timid." D. Eisenhower
 
CX747
Posts: 5576
Joined: Tue May 18, 1999 2:54 am

A Real Winner.

Fri Feb 08, 2002 1:37 am

Now, this is just my opinion but if you want a real winner in the trainer category look no further than the out of production C-152. These birds get beat every day and keep going. Never any problems, just pull them in for 50hrs, 100hrs and the anual inspection. My school has 4 of the little buggers and they go from early morning to late at night.
"History does not long entrust the care of freedom to the weak or timid." D. Eisenhower

Who is online

Users browsing this forum: afterburner, Atlwarrior, BAeRJ100, Baidu [Spider], blackbox67, cougar15, FAST Enterprise [Crawler], FLJ, Ncfc99, PerfectGriffin, PM, rbrunner, shamrock350, SyeaphanR, tvh and 244 guests