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Thanks
guys. I do read everything over at Paul Lamar's group, the Osprey
group and also over here on a regular basis. But I've read of 160# to
in the mid 300# 13B's.( and even the mentioned 190# which started this
thread) I'm hoping to use a 13B in my amphib and would like to
keep everything as simple and as light as possible, hence my
question.
I know
about Ken's Coot, but his is heavy. (Yes, I know he uses nitro to boost his
power to 300hp for water take-offs which sounds like a neat solution! And I
believe he's done this often with no ill results) However, I'm trying to
keep my project as light as possible to keep water operating
speeds as low as possible.
One
last question: Would a belt PSRU be much lighter than the geared ones mostly
used? Also, is it REALLY neccessary to use two bearing on both pulleys as I've
seen a 13B installatioin which used only one on each end.
Regards,
Hennie
..(this was the thread about the [FlyRotary]
Re: Rotary - FWD from Lancair ES List )..
Here's info for a rotary
installation comparison if Tracy can recall his last W&B on his
RV-4. Tracy, how does your plane compare to this?
- My RV-4 is bone stock VFR with lights (think J3-with-a-speed-kit) first
flown in '96.
- Lyc O-320 E2G, 150 HP, 2 mags, carb, no vacuum system, one radio and
transponder
- Sensenich FP metal prop with 2 2" spacers (41 pounds total for prop
& spacers)
- That big stock boat anchor starter
- Heavier than necessary 10 ply tires (extra 6#) because they were on
sale.
Empty weight 979# with 48# on the tail wheel
Empty CG 69.25
inches (using the 60 inch datum)
Mike McGee, RV-4 N996RV, O320-E2G,
Hillsboro, OR
13B in gestation mode, RD-1C, EC-2
At 09:00
2006-03-23, you wrote:
It varies a lot depending on
builder choices but I would put it closer to an O - 320, a 30 - 45 lb
difference depending on which of the many versions of the IO - 360 that
Lycoming made). The counterweighted crankshaft on the angle valve
IO-360 (200 HP models) accounts for a 28 pound increase
alone.
Tracy
- Hennie,
- I’m told the 2-rotor will come in about the same as an IO-360
installation. This is a very common install in the RV-6, also in the
RV-4 (Tracy Crook). If you’re really interested, you can get onto
the Fly Rotary group. Good bunch of guys and they will be able to
answer any question you may have about the rotary.
- Mark
- From: Rotary motors in aircraft [
mailto:flyrotary@lancaironline.net] On Behalf Of Hennie van Rooyen
[HQP]
- Sent: Thursday, March 23, 2006 5:56 AM
- To: Rotary motors in aircraft
- Subject: [FlyRotary] Re: Rotary - FWD from Lancair ES
List
- Hi Mark and
anyone,
- " Mazdatrix recently dyno’d a
N/A peripheral-ported 13B for Paul Lamar at 250hp @ 6000rpm, running a
carburetor. That is an easy 125hp/rotor, and 250 hp from a 195#
engine."
- What would be a
reasonable firewall forward weight of such a N/A complete installation?
What I really want to know is what is the lightest installation to be
expected based on average experience?
- Regards,
- Hennie
-
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