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You are right Bill, I just need to do it to find out where I am.On Feb 15, 2011, at 5:36 PM, Bill Bradburry wrote: Steve, I recommend getting it on a scale as soon as possible. My Legacy has a rear CG tendency. I would not have been able to mount the radiator in the rear. I even added an inch to the cowl to move the engine forward. My prop is somewhat heavy, (MT electric constant speed.). Before you go to a lot of work, I would pile parts in the plane and weigh it. Bill B
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Steve Veach
Sent: Tuesday, February 15, 2011 6:04 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: "Vari-Prop" Latest from Steve's Skunk works... The PSRU is an RD-1C, 2.85 to one. Prop is a 3 blade with a little Paul Lipps action designed in. 68" diameter I think. The one bad thing about Larry's Vari-Prop is that the high horse power one like I have is kinda heavy. I want to say 40 lbs but don't quote me on that. The airplane is a Lancair 360 so a heavy prop was good since the only place I could find to put the radiator was behind the baggage compartment... I am pretty nervous about putting this thing on a scale as I have no clue what its gonna weigh or where the CG is. I read the list every day but rarely post as I almost always find the answers to my questions. Once I get trying to start and tune this beast I'll be posting lots more. Hopefully this summer (but I've said that once or twice before). On Feb 15, 2011, at 9:28 AM, Kelly Troyer wrote:
Curious about details of your prop (ratio of your psru, prop diameter, prop weight and number of blades).........Please let the group know when you begin flight tests.............Also what aircraft do you have.............. Kelly Troyer
"DYKE DELTA JD2" (Eventually) "13B ROTARY"_ Engine
"RWS"_RD1C/EC2/EM2
"MISTRAL"_Backplate/Oil Manifold "TURBONETICS"_TO4E50 Turbo
I hung a Vari-Prop on mine. Haven't flown yet or even started the motor but The Vari-Prop looks to be a great piece of gear. I paid 9K a couple of years ago. The prop uses a slip ring to vary the pitch. You don't need a hollow shaft. A very well engineered slick little set up. Works great on Tracy's PSRU. Larry Morgan is the guy to talk to. You can email him at: On Feb 14, 2011, at 4:21 PM, Thomas Giddings wrote:
Has anyone on this Forum made Tracy's Drive useable for a constant Speed Hydraulic prop?. !5K for an Electric MT Now...Not goin to happen.Any other suggestions would be great.. Tom Giddings
VP Avionics Sales MIDWEST AVIONICS
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On Feb 12, 2011, at 2:02 PM, John wrote:
Tom, there is a gentleman in Texas who had an article in the Contact Magazine in late 09 or early 2010, who has a new model of the Marcotte PSRU on a Subu with the constant speed prop, I don't know the issue off hand as my machinist friend has all my magazines relating to the Marcotte, as well as my redrive, to make a seal retainer for the output shaft and tap the redrive for an oil cooler and a temperature pickup. If someone on this site has the Contact Magazine it has the e-mail address of the fellow in Texas. I talked with him last summer and he had over 80 hours on the PSRU and was happy with it. Contact Magazine can be reached at Editor@CONTACTMagazine.com and Patrick Panzera the editor will help you out for the article. JohnD
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