Rotax B or C?
JJ Dias Silva
Is it worthing to change it by the C type?
Any opinion will be appreciated.
J. Julio D. Silva
CT4QW Porto Portugal CS-UDZ
Mark Smith
It would help if you described the reason for needing the repairs to the
B box.
This would greatly help the decision on the switch to the C box.
--
Mark Smith
Tri-State Kite Sales http://www.trikite.com
1121 N Locust St
Mt Vernon, IN 47620 mailto:ma...@trikite.com
1-812-838-6351
Rick Pitcher
Depends on the prop you're swinging. The B-box is limited to mostly
2-blade wooden props or light composites. The C-box will
handle a much heavier prop.
Check out prop inertia at:
http://www.800-airwolf.com/pdffiles/ARTICLES/part31.pdf
servicing the gearbox at:
http://www.800-airwolf.com/pdffiles/ARTICLES/part4.pdf
and "intro to the "C-box" at:
http://www.800-airwolf.com/pdffiles/ARTICLES/part25.pdf
Rick P.
JJ Dias Silva
wrote:
>JJ Dias Silva wrote:
>>
>> I am in the way to repair my B reduction gear of my ROTAX 582.
>> Is it worthing to change it by the C type?
>> Any opinion will be appreciated.
>> J. Julio D. Silva
>> CT4QW Porto Portugal CS-UDZ
>
>
>It would help if you described the reason for needing the repairs to the
>B box.
>
>This would greatly help the decision on the switch to the C box.
The reason is that I need to change both toth weels.
The bigger has 5 broken teeth.
~The propeller I am using is a 3 blades fiber one.
Mark Smith
> Mark Smith wrote:
> It would help if you described the reason for needing the repairs to the
> >B box.
> >
> >This would greatly help the decision on the switch to the C box.
>
> The reason is that I need to change both toth weels.
> The bigger has 5 broken teeth.
> ~The propeller I am using is a 3 blades fiber one.
In all my years flying rotax gearboxes, I have never damaged in any way
a B box, but I only run Tennessee props, 66 inch max diameter.
I run a 72 inch warp on my C drives,
I have seen the large gear in a C box come loose from the tapered lock
ring, one damaged the box requiring a complete replacemenmt, the others
merely a tightening of the big nut to a higher torgue than the factory
original torque
a cistomer damaged a B box output sgaft crashing a tractos mini max
once.
they are tough boxes
were the teeth broken by a crash ?
Dutch Revenboer
I think JJ is flying a modified Falcon XP, a pusher canard designed for the
503. I've seen pics of his plane, and damned if they didn't mount a 582 water
cooled, with the radiator sticking up above the main wing!
The XP is heavy, 500+ empty. He probably needs a C box just to swing enough
prop to move that beast. Due to low clearance, you can't swing more than 60",
so you need 3 blades. My XP has the original Hagar Belt drive on a 503 non
provisional, swinging a 3 blade 60" Powerfin.. I love the simplicity of the
belt drive. Some day I'll have to replace the engine and go to a gear box.
God help me.
Dutch
N507AA, Falcon XP
Stillwater, OK
JJ Dias Silva
Dear All:
Dutch is wright: the AC is a Falcon XP canard with a 582.
The propeller is a 3 blade and Ducth is wright again in what concerns
about clearance. I am not sure if it is a 60" only that is a Airplast
one. Sunday I will measure it.
What happen is that on a steep way landing I notice a strange metatlic
noise but everything look normal..
After landing and desassembling the gear box I found that the bigger
gear had some 5 parcially broken teeth.
Now my problem is to repair this one changing the two gera (motor
shaft and the bigger one) and make a relativly cheap and easy repair
or to buy a new "C" type box.
So what is the main diference between them aside the price?
The "C" seems to be more reliable. is this true?
Does the "B" be adequate?
These are the questions.
If you want to take a look at the animal go to
my son's WEB page.
I end thanking for all the contributions that all of you are giving to
me helping to take the right decision based in your knowledge and
experience.
Julio Silva
Porto
Portugal
<dut...@NOSPAMatt.net> wrote:
J. Julio D. Silva
CT4QW Porto Portugal CS-UDZ
JJ Dias Silva
Dear All:
These are the questions.
<dut...@NOSPAMatt.net> wrote:
J. Julio D. Silva
CT4QW Porto Portugal CS-UDZ
Dan Horton
The "C" allows you to use a prop with a larger mass moment of inertia.
The "B" box has a much lower limit. Hang that Airplast prop from the ceiling
per the previously posted Rotax Service Bulletin. I suspect it will answer the
B vs C question for you.
Dan
Mark Smith
>
> On Fri, 28 Sep 2001 15:15:05 GMT, Dutch Revenboer
>
> Dear All:
>
> Dutch is wright: the AC is a Falcon XP canard with a 582.
> The propeller is a 3 blade and Ducth is wright again in what concerns
> about clearance. I am not sure if it is a 60" only that is a Airplast
> one. Sunday I will measure it.
>
> What happen is that on a steep way landing I notice a strange metatlic
> noise but everything look normal..
>
> After landing and desassembling the gear box I found that the bigger
> gear had some 5 parcially broken teeth.
>
> Now my problem is to repair this one changing the two gera (motor
> shaft and the bigger one) and make a relativly cheap and easy repair
> or to buy a new "C" type box.
>
> So what is the main diference between them aside the price?
> The "C" seems to be more reliable. is this true?
> Does the "B" be adequate?
>
> These are the questions.
>
> If you want to take a look at the animal go to
>
> http://juliosilva.cjb.net/
>
> my son's WEB page.
>
> I end thanking for all the contributions that all of you are giving to
> me helping to take the right decision based in your knowledge and
> experience.
as I remember, the airplast is a fairly light prop,,,,,,,,,,the B box
with a small 60 inch diameter should be fine,,,,,,,,,,
Dutch Revenboer
to be electric started, as you can't really get to a pull starter the way
the engine is mounted. Now, as I understand it, you have to have the C box
for the enclosed starter? Mine has the old B&S lawn mower starter, works
geat and is CHEAP.
Dutch
JJ Dias Silva
<dut...@NOSPAMatt.net> wrote:
No, I am using a electric starter with a B gear box.
J. Julio D. Silva
CT4QW Porto Portugal CS-UDZ
JJ Dias Silva
wrote:
Dear Mark:
As I told was not due a crash. In normal high final, power to iddle.
The propeler is an Airplast 3 blades 64" diameter.
>JJ Dias Silva wrote:
>> Mark Smith wrote:
>> It would help if you described the reason for needing the repairs to the
>> >B box.
>> >
>> >This would greatly help the decision on the switch to the C box.
>>
>> The reason is that I need to change both toth weels.
>> The bigger has 5 broken teeth.
>> ~The propeller I am using is a 3 blades fiber one.
>
>In all my years flying rotax gearboxes, I have never damaged in any way
>a B box, but I only run Tennessee props, 66 inch max diameter.
>
>I run a 72 inch warp on my C drives,
>
>I have seen the large gear in a C box come loose from the tapered lock
>ring, one damaged the box requiring a complete replacemenmt, the others
>merely a tightening of the big nut to a higher torgue than the factory
>original torque
>
>a cistomer damaged a B box output sgaft crashing a tractos mini max
>once.
>
>they are tough boxes
>
>were the teeth broken by a crash ?
J. Julio D. Silva
CT4QW Porto Portugal CS-UDZ