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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, Does 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" <squiggles@yahoo.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
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 hoping 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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