IIRC, the bare 13B block weighed 180 with water pump but nothing else, not even the oil pan.

The 20B was 70 pounds heavier but that was with a 13B waterpump setup, not the heavier 20B pump assembly.

Tracy 

Sent from my iPad

On Feb 8, 2015, at 13:36, Kelly Troyer <flyrotary@lancaironline.net> wrote:

Thanks Mark..........Very possible I will buy the 20B I mentioned so after stripping all the 

unneeded auto stuff off I will have at least a a bare block weight........I certainly would go 

for the alum RX8 water-pump/housing mod that you have..........I already have the RX8 

alum front cover.........Not sure I would do the P-port mod as these things already have 

more power than I will ever need for my project..........Was planning on a Turbo 13B but

the added weight and complexity of the turbo tends to make the NA 20B look doable.....

Thanks,

Kelly 

On Sun, Feb 8, 2015 at 9:12 AM, Bill Bradburry <flyrotary@lancaironline.net> wrote:

Mark,

You posted some videos on utube a while back.  Have you made any recently?  Folks like me really like to watch them!

 

Bill

 

---

From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]
Sent: Sunday, February 08, 2015 5:13 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: 20B weight

 

Kelly,

That's a tough one. The 3-rotor weight typically quoted is 295#, but this isn't fwf. Take into account that I am running dual alternators, an aluminum Renesis water pump housing and aluminum water pump, p-port intake, and it is difficult to say the fwf weight. What I can say is that my a/c weighed in at 2050#, which is very close to the typical Lycoming Lancair. Going by that, I would guess that my fwf 20b weighs close to what a fwf IO-540 weighs.

Going at it from a different angle, I believe the W&B showed about 550# on the nose gear. That would be a pretty good ballpark number for FWF. Its been a while, so I would have to check the logs to see exactly what the weights were when first inspected.

Mark

 

On Sun, Feb 8, 2015 at 2:59 AM, Kelly Troyer <flyrotary@lancaironline.net> wrote:

Mark,

Can you give me a wire wall forward weight of your 20B minus the oil & water radiators

and your constant speed prop or your best estimate ??...........

 

Thanks,

 

Kelly