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Your welcome, David. My impression (at that is
all it is ) is that alternators supposedly designed/modified for aircraft
use seem to have more problems that standard Auto alternators. I know
Van's RVs had a model that was an auto alternator modified for an external
regulator and there was quite a thread on problems with them. Never
listened long enough to find out what the problem was though.
Ed
----- Original Message -----
Sent: Wednesday, October 24, 2007 3:37
PM
Subject: [FlyRotary] Re: 350 lbs
dry
Thanks Ed, my thoughts were the same, I work as an auto tech at
a Cadillac dealer, specialize in auto trans & computer controlled sys.,
put a Tech II diog. tool on my wife's Deville & my Chevy PU, drove
the heck out of them, then down loaded the info to PC (more mem. & power
in PC) then spread the info out & graphed it so I could see
milliseconds looking for fast spikes in voltage or drops (vacant areas). It
was very accurately controlled, (I was told that some aircraft radios were
very voltage sensitive & that was my only concern, not any longer).
Thanks again Ed, I'll let you all get back to the correct topic of this
thread, I wish we had weighed our eng. assem. before perm. mounting, will be
weighing aircraft soon. David RV-6A Rotary.
--------------
Original message --------------
From: "Ed Anderson"
<eanderson@carolina.rr.com>
David, I initially set it up (wired it) so I could add
an external alternator voltage regulator, however, I have now flow with the
same alternator for 10 years using the internal regulator without a
problem. I never added the external regulator.
In all the years, I have had automobiles with
internally regulated alternators, I have had a very few fail, but none ever
failed in a mode to generate high voltage (always lower voltage).
Certainly not to say it couldn't happen, but I feel comfortable with the
present arrangement.
YMMV
Ed
----- Original Message -----
Sent: Wednesday, October 24, 2007
10:52 AM
Subject: [FlyRotary] Re: 350 lbs
dry
Ed;; The Mazda alt. that you are useing has the volt. reg. internal,
are you useing an external reg. also, I set up the harness for an external
to be added if needed, do not want to if not needed, how is it working for
you. Thanks, David Cook, RV-6A Rotary Lansing MI.
(getting close.)
--------------
Original message --------------
From: "Ed Anderson"
<eanderson@carolina.rr.com>
> Don't beat yourself up
about 400 lbs. While we all would like to see our
> installations
weigh in at 300 lbs - I have not yet seen any credible figures
>
showing that having happened. I think probably that Perry Mick would
come
> the closest when he was flying with no PSRU - just direct
drive.
>
> While my early inexperence with aircraft design
led me to the flawed "...if
> in doubt, make it stout.""
philosphy - I just never realized how quickly an
> ounce here and
an ounce there would quickly add up to 170 lbs overweight -
> did
have 44 lbs of battery, but still heavy.
>
> In any case,
to make you feel a bit better, here is the breakout of my FWF
>
installation 377 lbs dry and 406 wet.
>
>
> Ed
>
> Engine Data
>
> Manufacture: Mazda
Model: Rotary 13B(6 Port) Serial No:
>
> Displacement: 80
CID Oil Pressure Max: 85 Psi Min: 20 Psi
>
> Rated H.P:
160 at 6500 RPM
>
> Weight:
>
> Dry
>
> Engine (core) 190 Lbs (Mazda 13B)
>
> Starter: 10
Lbs (Toyota Geared)
>
> Alternator: 9 Lbs (Mazda 70A)
>
> Ignition Coils Assembl: 7 Lbs (Mazda)
>
> Evaporator Cores (2): 7 Lbs (Fitted with AN-16 Threaded
fittings)
>
> Oil Cooler: 4 Lbs (Earl's)
>
>
Intake Manifold: 15 Lbs (Machined)
>
> Fule Injector Body:
3 Lbs (TWM)
>
> Air Box: 1 Lb (Made out of 0.032 2034
Alum)
>
> Oil Filter Remote: 3 Lbs (Wolfs)
>
> Misc. Brakets, Hose (etc): 25 Lbs (Mostly Earl's Stainless
Steel
> Braid/Fittings)
>
> Exhaust 5 Lbs
(Stainless Steel, D oes not include Muffler)
>
> Mufflers
16 Lbs (Stainless Stell 3 1/2" Dia Borlo 32" Length, 2 Required, 8
> lbs each)
>
> PSRU RWS 2.85:1 42 lbs
>
> Propeller 18 lbs
>
> Motor mount 19 lbs
>
> Total (Dry): 377 Lbs
>
> Wet
>
>
Coolant (8 Qts) 16 Lbs
>
> Oil ( 6 Qts) 13 Lbs
>
> Total: 406 Lbs
>
> ----- Original Message -----
> From: "Scott"
> To: "Rotary motors
in aircraft"
> Sent: Tuesday,
October 23, 2007 6:31 PM
> Subject: [FlyRotary] 350 lbs dry
>
>
> I finally reached a point when everything was
mounted on the engine and
> wanted to know the dry weight. It
came in at around 350 pounds.
>
> Add in a 3 blade IVO
prop, oil, and coolant and I am at 400 pounds...
>
>
Needless to say that is not what I was ho p ing for as Zenith lists
their FWF
> for a wet O360 with a 2 blade metal prop at 400
pounds.
>
> What have others come it at for a dry weight
for their 13b setups?
>
>
>
>
>
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