flyrotary@lancaironline.net Mailing List Archive

Bobby,

Curious as to the serial # (A,B,C,D XXX) of your 20B.........I purchased Rob Johnson's

unused early (Before reinforced dowel area side plates) 20B serial #A304 recently... He

purchased it in about 1997 for his Velocity and did not use it..........Amazing how small a

package that 250+ hp is after removing about 100 lbs of turbos and other unneeded parts

from it........

Kelly Troyer

On Wed, May 13, 2015 at 11:02 AM, Bobby J. Hughes <flyrotary@lancaironline.net> wrote:

Kelly,

No weight and balance issues with the RV10 and 20B. The aluminum plates would be nice but not in the budget.

Bobby

From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]
Sent: Wednesday, May 13, 2015 11:17 AM

To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Questions for Ed Anderson- Plugs UP Oil System photo of bottom

Bobby,
Can your ship handle the extra weight or are you thinking of replacing some of
the iron side plate with alum plates such as those from "Racing Beat" ?

Kelly troyer

On Wed, May 13, 2015 at 7:30 AM, Ed Anderson <flyrotary@lancaironline.net> wrote:
Well, I found that like anything else the Plugs up installation has its pros and cons.

However, the only real con was the lack of vendor support for Plugs Up.

Having the exhaust outlet on the bottom simplified plumbing, also reduce chance of fuel from injectors falling directly on a hot exhaust. No problem with flooding the engine. I did it a few times, but 4—5 revs of the engine pumped all the excess fuel out the exhaust ports and of course the spark plug holes being on top did not collect fuel. It also provided room under the cowl for longer intake runners – don’t know if that would be the case with the 20B, but assume it would.

All in all, if I did it again, I would use plugs up everything else being the same. Oh, yes, much easier to change the spark plugs {}

I did have to modify Tracy’s PRSU mounting plate slightly – moving the starter position.

Good luck on your decision, Bobby – more power is always hard to resist {)

Ed

From: Bobby J. Hughes
Sent: Wednesday, May 13, 2015 8:04 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Questions for Ed Anderson- Plugs UP Oil System photo of bottom

Looks like a good arrangement. I’m still on the fence as to installing the 20B I purchased a few weeks back. If I do make the swap I’m considering plugs up as an option.

Bobby

From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]
Sent: Tuesday, May 12, 2015 4:50 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Questions for Ed Anderson- Plugs UP Oil System photo of bottom

Hi Bobby,

Found this old photo of the bottom of the oil pan which may help. The blue fitting is naturally the drain hole at the lowest part of the sump.

Ed

From: Bobby J. Hughes
Sent: Tuesday, May 12, 2015 3:39 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Questions for Ed Anderson- Plugs UP Oil System

Thanks Ed. The standoff is not visible in the picture but I had guessed you did something similar. Any issues with sealing the oil pickup tube to the block off plate and front iron?

Bobby

From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]
Sent: Tuesday, May 12, 2015 3:23 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Questions for Ed Anderson- Plugs UP Oil System

Hi Bobby,

I believe the things you have the arrows pointing to are triangular shaped braces that support the oil sump to the oil pan. The are welded to top of sump and plate.

To access the bolts in the area of the sump, I stood the 4”x 4” tubing I used for the sump off from the pan about 1 – 1 1/2”. I did this by using a 1” x 1 1/2” rectangular tube (its end’s plugged) welded to both the plate and the sump. Then 3/4” dia (I think around 6 holes) holes were drilled through plate, standoff and sump for the oil to return to the sump – probably best to drill holes before welding components together, but they can be drilled from the inside plate side – just make sure you get all shavings out. This stand-off also gave you access to around 3-4 pan bolts. Depending on your set up these may or may not be a pain to unscrew, but it can be done.

The round tall blue tube served as oil fill tube and dip stick tube. It was threaded internally at the top and a threaded plug with a hole drilled in it for the dip stick was used.

The aluminum tubes were coolant (front) and air/oil separator (which I took off after two years of flying with it and it collecting no oil, because the rotary simply was not spitting any out.

Ed

From: Bobby J. Hughes
Sent: Tuesday, May 12, 2015 2:57 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Questions for Ed Anderson- Plugs UP Oil System

Ed,
I have a couple of question about your plug up installation. How do you access the oil pan bolts located behind the oil reservoir and allow for oil drain back? Also I see what looks like an additional tube (black arrow) in the attached photo. Can’t figure out what it’s for. Is it a support bracket?

Thanks,

Bobby Hughes

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