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  #31  
Old 11-03-2010, 11:28 AM
Mark Henderson Mark Henderson is offline
 
Join Date: Oct 2008
Location: Napa, Calif
Posts: 274
Default Replaced pianno hinges with camlocks.

I found the piano hinges a pain to put in. I replaced the upper cowl and side hinges with Skybolt camlocks. This winter I will do some glass work and add enough flange to replace the 6 nut plates on the front of the upper cowl. It is a breeze to pull the top cowl now.
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  #32  
Old 11-13-2010, 05:13 PM
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Jetguy Jetguy is offline
 
Join Date: Aug 2008
Location: Texas, Fort Worth
Posts: 1,230
Thumbs up Mystery solved/Oil Sender

This has been discussed on other threads but I put it here because it is a modification and Iím sure others will encounter the same problem as stated below.

I have recently had some problems with my Honeywell oil sender which caused me to do some research on this problem. I started by calling all three Rotax dealers in the USA, California Power Systems, LEAF, and Lockwood Aviation. No one had a new Sender in stock as of Monday 11/8/2010 but said that some were possibly coming in later in the week, CPS said they had one customer waiting for 3 weeks for a new one. All 3 dealers said that they have seen several new Honeywell senders fail since Rotax started putting them on, which has only been a little over a year now. Lockwood Aviation said they canít keep them in stock. They also said that the VDO units failed even faster. If you want to talk to a Tech guys at Lockwood you must call between 9-10amet & 2-3pmet. Lockwood is now selling a kit, Part #EAPSIRK, price 74.95, which will provide you with all the parts to move your sending unit to the firewall. See picture below. They also sell the old style VDO sending unit, Part #GAV360-430, price 44.95. If you want to search for the part on the web put in VDO V360-430, itís a two prong unit, which is the one you will need on the RV12 with the Dynon. I installed the Lockwood remote kit on Wednesday and moved my Honeywell sender to the Firewall to the same location as the fuel sender unit. Now I get rock solid indications on the Dynon with no fluctuations in oil pressure.

Conclusions! The reason we are getting erratic Oil Pressure indications on the Dynon is because of the location of the sender unit on the engine not anything that has to do with the Dynon its self. Sorry Larry G! Mounting the sending unit on the front of the engine where there is a lot of vibration and heat is a poor design by Rotax. Anybody see sending units mounted on the front of a new Continental or Lycoming! Having this sending unit mounted on the front of the engine will cause premature failure of the unit sooner or later. I do admit some senders may last longer than others. But if you have one fail out of warranty its going to cost you some big bucks to replace it. I recommend that RV12 owners move the sender unit back to the fire wall after you receive their Airworthiness Certificate. This will increase the life span of the unit as well as give better indications on the Dynon.

Installation Notes: If you want to build your own remote kit here is some info. The hole on the front of the Rotax where the Honeywell sender is screwed in is a 1/8 inch pipe thread so you will need a male and a female, female to screw the Sender into back at the fire wall, 3 feet of tubing is about right, 3.5 feet will give you a little more room to maneuver, Lockwoodís kit comes with 3 feet. Itís a good idea to have a restrictor in the male part to reduce the time before your engine runs out of oil if you get a leak in the hose running back to the firewall sender, see pic below, the Lockwood kit comes with this part. I donít know where you can find this part other than Lockwood. The Lockwood kit comes with fire sleeve to put over your tubing. In order to get the tubing into the fire sleeve inject air in to the sleeve as you push the tube into it. Itís a pretty tight fit. If you use the Honeywell sender donít clamp it to tight, the sender has a partial plastic case and you could damage it. If you could incase the sender in some cushion material all the better. I ran my tubing up and across the top of the engine for cooling as seen in the picture. Running it under the cylinders next to the exhaust headers seemed like the warmer of the two options. I used the same screw that holds the fuel sender in place to attach the Oil Sender with an adell clamp to the fire wall. If you are going to use the VDO unit there are two prongs on the back of it. One is a negative/ground and the other one is the positive lead. Take a small length of wire and ground the neg prong to the fire wall where the adell clamp is bolted on. Then run the positive lead to where the red wire of the Honeywell unit is connected to the wiring harness. Cut the white wire off from the Honeywell and put some heat shrink over it to seal it off. Now go into the Dynon and change the sender from 4 to 1. See pages 3-6 and page 6-7 in the Dynon installation manual. I didnít do this because right now my Honeywell unit is still working, but Iím pretty sure that it will work ok. If someone does switch over to the VDO unit and this works ok Post it on this thread.

Fact: The old style VDO Oil pressure sender was replaced in late 2008 to the current Honeywell unit which is very expensive.

Fact: Both of the units are mounted on the front of the engine where there is a lot of vibration and heat.

Conclusion: Oil pressure on the Dynon in RV12s fluctuates plus or minus 5 to 8 psi. Since we have a wide green arc it doesnít seem to be a problem. I think this fluctuation in the Dynon is caused by the vibration of the sender on the front of the engine not from the Dynon.

Fact: The VDO senders were known to failure.

Fact: Flying RV12s are starting to see the Honeywell senders Fail and a history of failures is still being collected. We as owners may not ever see this data so if yours fail post it here on this thread so we can keep track.

Fact: The reason that Rotax went to the Honeywell Sending Units was because the Manufacture of the older VDO Units was bought out by a new company who no longer wish to have their Units in Airplanes.

Fact: Honeywell steps up with new Digital Sender. Rotax switches over to this new sender in late 2008 or early2009.

Fact: In order to get warranty service on your new Rotax you must register it with one of the 3 dealers in the USA with the paper work that comes with the engine. Then buy a new part at retail price to replace the broken part, then fill out the appropriate paper work that comes with the new part and send the old part back with this paper work. Then wait several months for a refund.

Kit from Lockwood Aivation to move your sender back to the firewall:




Male 1/8 pipe thread with restrictor in it:


Current factory location of Oil pressure Sender:


New hose screwed in where sender used to be:


Sender moved to firewall:


John
RV12 N1212K
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  #33  
Old 11-13-2010, 07:57 PM
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RDOG RDOG is offline
 
Join Date: Apr 2009
Location: Propwash Airport (16X), Texas
Posts: 136
Default Nice Post

This was a great post. I hope we see some more of them.
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  #34  
Old 11-13-2010, 08:47 PM
JBPILOT JBPILOT is offline
 
Join Date: Nov 2007
Location: Jesup, Iowa
Posts: 1,586
Default Hey John - -

I like the idea. Makes lots of sense. Vibration would seem to be the bigger problem, but who knows. I think I will do that one also. Just a note, the restrictor may be the reason for more stable readings, but the other benefits are real.

John Bender
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  #35  
Old 11-13-2010, 09:14 PM
Hal-san Hal-san is offline
 
Join Date: Nov 2007
Location: Benton City, WA
Posts: 197
Default John

I did a search for the part number that you provided for the kit at Lockwood and got a response that it did not exist. Is this something new that they have not added yet to their web site?

Hal
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N912HM RV-12 Flying.
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  #36  
Old 11-14-2010, 05:58 AM
Mich48041 Mich48041 is offline
 
Join Date: Apr 2008
Location: Riley TWP MI
Posts: 2,635
Default VDO V360-043

If the Honeywell oil pressure transducer is replaced with the VDO V360-043 or Dynon transducer, do NOT use any of the existing wires. Instead, run a new wire (WHT/YEL) directly from the transducer to pin 6 of the Dynon EMS 37-pin connector. The VDO V360-043 needs to be grounded to the firewall, either through the case or via a grounding terminal if the sender has one. Like John said, The transducer type needs to be changed in the Dynon setup
The red wire is 12vdc that powers the Honeywell transducer. The V360-043 does not require 12 volts. Using the red wire will cause bad things to happen. The existing WHT/YEL wire goes to the Van's control board to a resistor that is connected to ground. Using that wire with the V360-043 will give false oil pressure readings.
Joe
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  #37  
Old 11-14-2010, 07:57 AM
steve wyman steve wyman is offline
 
Join Date: May 2008
Location: Centennial, CO
Posts: 241
Default

John, so far my Honeywell transducer has been functioning OK, just a little bit bouncy. If I order the remote location kit from Lockwood, does it include the VDO sender? At this time, I'm just planning on moving the Honeywell sensor to the remote location, so I won't need the VDO. This is a great idea, by the way, thanks for sharing. Steve
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  #38  
Old 11-14-2010, 09:28 AM
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Tony_T Tony_T is offline
 
Join Date: Dec 2008
Location: Lacey, WA
Posts: 1,204
Default Back-up gauge

Hmmm...this oil pressure sender problem could be a nightmare if it fails while you are somewhere and a sender is not available. Most are not likely to carry a spare of the expensive one, and the cheap one (also with a history of failures) requires a new wire if I read the posts correctly. Jetguy's post illustrates running tubing from the engine and firewall mounting the sender and is a particularly good fix because you could put a tee in the line and install a MECHANICAL back-up gauge somewhere. Then if the sender fails you will not be grounded in Timbuktu.
Here is a link to a mechanical gauge, $40 plus $6 for an installation kit of nylon pressure tubing and fittings.

Would this be overkill?

Tony
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RV-12 #202 -- Flying
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  #39  
Old 11-14-2010, 12:44 PM
JBPILOT JBPILOT is offline
 
Join Date: Nov 2007
Location: Jesup, Iowa
Posts: 1,586
Default Hey Tony - -

Very good point !

John Bender
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  #40  
Old 11-14-2010, 03:35 PM
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Jetguy Jetguy is offline
 
Join Date: Aug 2008
Location: Texas, Fort Worth
Posts: 1,230
Lightbulb Oil Pressure Update!

Steve. the VDO sender does not come with the remote location kit. See my post for the price.
Hal, you have to call Lockwood with the part number I posted to order it.
Mich, could you use the red wire if you cut it behind the instrument panel and moved it over to Pin 6 after you remove the white wire that is there now?

John
RV12 N1212K
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