SkyTrekker Posted December 21, 2017 Report Posted December 21, 2017 Is the turn coordinator from Britain on our positive control equipped Mooney’s primary electric with a vaccine backup, or vice versa? The poh says the turn coordinator is electro-vacuum, but doesn’t speak to failover specs or assumptions. Getting ready for practical test soon and want to make sure I have the real deal re: what fails/works when there is either a electrical or vacuum system failure. Thoughts? Thanks! Quote
N6758N Posted December 21, 2017 Report Posted December 21, 2017 I believe the actual turn coordinator is electric, the vacuum only powers the PC components and controls the servos, etc... Quote
Browncbr1 Posted December 22, 2017 Report Posted December 22, 2017 The TC is electric and has valves in the back that direct vacuum right or left to operate the PC Quote
N201MKTurbo Posted December 22, 2017 Report Posted December 22, 2017 It has a motor with a turbine wheel on the outside of the motor armature. it will run on either electric or vacuum. neither one is primary, it will run on either or both. Quote
SkyTrekker Posted December 22, 2017 Author Report Posted December 22, 2017 Thanks @N6758N and @Browncbr1. So in the event of an electric failure, the turn and bank indicator is inop. Quote
N201MKTurbo Posted December 22, 2017 Report Posted December 22, 2017 Just now, SkyTrekker said: Thanks @N6758N and @Browncbr1. So in the event of an electric failure, the turn and bank indicator is inop. Nope, it will still work if you have vacuum. Quote
SkyTrekker Posted December 22, 2017 Author Report Posted December 22, 2017 @N201MKTurbo That is what I thought! But I can't find anything in the POH or on Brittain's website that explicitly states it that way. Is that referenced anywhere authoritatively, or is it just common knowledge? Quote
takair Posted December 22, 2017 Report Posted December 22, 2017 16 minutes ago, SkyTrekker said: @N201MKTurbo That is what I thought! But I can't find anything in the POH or on Brittain's website that explicitly states it that way. Is that referenced anywhere authoritatively, or is it just common knowledge? From the web site: The PC system was upgraded in 1967 to utilize the Brittain TC100EVS autopilot turn coordinator gyro. The TC100EVS provides visual indication of wing leveling in addition to operating as the gyro sense element for the PC system. Roll trim capabilities exist on the gyro unit but all other facets of the install remain the same. The TC100EVS turn coordinator gyro operates from vacuum or electric power sources, either or both, for an added measure of safety. 1 Quote
SkyTrekker Posted December 22, 2017 Author Report Posted December 22, 2017 Just now, takair said: From the web site: The PC system was upgraded in 1967 to utilize the Brittain TC100EVS autopilot turn coordinator gyro. The TC100EVS provides visual indication of wing leveling in addition to operating as the gyro sense element for the PC system. Roll trim capabilities exist on the gyro unit but all other facets of the install remain the same. The TC100EVS turn coordinator gyro operates from vacuum or electric power sources, either or both, for an added measure of safety. Thanks takair. I guess I didn't read the site carefully enough. The phrase "if it'd been a snake..." comes to mind :-) 1 Quote
0TreeLemur Posted February 9, 2018 Report Posted February 9, 2018 On a related note, can someone tell me what vacuum air filters should be installed on the Brittain TC100EVS? While I've got the panel off, I want to change them, and what is there doesn't look right. Thanks. Quote
takair Posted February 9, 2018 Report Posted February 9, 2018 6 minutes ago, Fred_2O said: On a related note, can someone tell me what vacuum air filters should be installed on the Brittain TC100EVS? While I've got the panel off, I want to change them, and what is there doesn't look right. Thanks. If it looks like an automotive gas filter, then it is probably correct. I suspect there is a commercial version, but have not found one yet. Quote
0TreeLemur Posted February 9, 2018 Report Posted February 9, 2018 Yeah, I cannot find a PMA'd one either. The Rapco filters use 0.5 micron filter media. The best Bosch gas filter I can find is 3 micron, I think that the little clear plastic things that I pulled out scare me. I want to baby that TC100EVS. I was thinking about a Rapco RA1J10-1 which has two 3/8" connectors, I could connect each of the two hoses to one end. Quote
Yetti Posted February 11, 2018 Report Posted February 11, 2018 If you have a printers and some labels, you can make them just like Brittian does. If you pull their part number label off you will find the manufacture information. Fram G3 2 Quote
Yetti Posted February 11, 2018 Report Posted February 11, 2018 Extra CB points if you reuse the Brittian label 2 Quote
Yetti Posted February 11, 2018 Report Posted February 11, 2018 National Aviation Parts Association Quote
Mooneymite Posted February 22, 2018 Report Posted February 22, 2018 My Brittain vacuum filters say Fram G-1 under the label. The filter media inside the G-1 looks slightly larger than the G-3, but otherwise, not much visible difference. Quote
59Moonster Posted March 3, 2020 Report Posted March 3, 2020 On 12/21/2017 at 6:53 PM, N201MKTurbo said: Nope, it will still work if you have vacuum. Since it can also run on electric any idea if that means that the vacuum system can be removed to install dual G5's? Quote
Andy95W Posted March 3, 2020 Report Posted March 3, 2020 14 minutes ago, 59Moonster said: Since it can also run on electric any idea if that means that the vacuum system can be removed to install dual G5's? That's kind of a moot point because vacuum is still needed to power the Brittain servos. 1 Quote
59Moonster Posted March 3, 2020 Report Posted March 3, 2020 4 minutes ago, Andy95W said: That's kind of a moot point because vacuum is still needed to power the Brittain servos. Dang. That's what I was trying to figure out. Thanks! Quote
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