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JETmachine

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Posts posted by JETmachine

  1. The STC calls for the Strikefinder to be placed here (arrow). This antenna was installed 20 yrs ago and shows lightning in the Sierras when flying around San Francisco.  Last winter when working in the hangar during a storm, the Strikefinder lit up during lightning strikes. The VOR antennas are in the wing tips. The ELT is in the glass dorsal fin and checks Okay with ground control. That said, the Strikefinder is sensative to about 200 miles in this position. jt

    Screenshot 2020-07-25 21.59.47.png

  2. 56 minutes ago, M20Doc said:

    Baffle tapes appear to be folded back allowing air leaks.Roger that. Installing the top half of the cowl, I reach in folding the baffle forward. The starboard side dark area indicates it seals. I'll double check the port side.  

    Side baffle tapes at cylinder #1 need securing grommet at overlap. Check. 

    JPI wires secured to other engine wiring lig mag P leads and alternator field wires.Is the concern induction for JPI  EGT data,  vibration, or abrasion?

    EGT probes outside the normal 2-4” from the flange. The factory probe (1) was this distance I used as a guide for the other 3. How much lower EGT temp read should I expect with the probe in this location?

    NOTE: The STC for the 200hp was written for a 1964 M20C. When fitting a 201 cowl on a '63 and earlier, a 201 cowl requires a 1" joggle to attach the cowl (see the vertical and horozontal aluminum attach-points). A 201 cowl will otherwise not fit on pre-'64 M20. 

    NOTE II: The space between the cowl and #1 exhaust stack is CRITICAL and especially so on departure. Operate full rich at best cooling speed (100mph) and it works. Othewise it will boil cowl paint.

    NOTE III: The '93 201 cowl has an aluminum L horizontal brace. I used 1" countersunk washers to spread the load over a larger area of the fiberglass. the L is epoxied and secured with huck torque rivets. 

    NOTE IV: The L reinforcing brace will ride on the muffler when the dynafocal mount relaxes causing what feels like flutter (its not flutter). Shape the muffler sleave to prevent contact and iit works perfect after causing the pilot to mess his pants thinking something has high speed flutter(that's not possible but its cold comfort when the AC is shaking from the cowl-muffler contact.) 

    Clarence Thank you!!! Your visual inspection is appreciated. Cheers. jt

     

     

     

     
     
     
     
     

     

  3. 28 minutes ago, carusoam said:

    Talking with Bill Wheat was a blast!

     

     

    Bill made easy work of a problem when I STC'd the '93 24v LYC onto the '63C 12v AC. 

    1. The engine doesn't care if its 12v or 24v. 
    2. He counseled to remove the shower spark parts.
    3. exchange the bimetal oil temp sensor (if anyone is about convert their 0-360 to an IO-360, shout out: Connecting the bimetal sensor is an easy but not an obvious fix.)
    4. And, saved me from replacing the ignition/starter (Bendix) key by flipping the switch upside down. By removing the 3/8"s brass terminal link, the 1963 switch worked perfect without further alterations with the '93 single drive mags. 
    5. Some of us had the good fortune to meet Bill at the San Antonio Home Coming circa 2002. Some may recall Bill talking about the 540 they put on an M20E. Bill said the Commanche 250 guys would stop by the factory occasionally. Bill would fly the 540 E with the 250. Bill brought the house down with his tale about getting the dude's 250 going flat out. Then Bill hit it with the 540 E flying away and pulling straight up just to tick the 250 off.  Of course several of us asked if Mooney had any paper on that mod. No such luck. Apparently in those days, Bill, Roy and others were AC hot rodders experimenting to see what worked. Those days are long gone but the memories live on. jt
    • Like 1
  4. 3 hours ago, MIm20c said:

    "...my vne is around 190 mph ...". 

     

    I spoke with Bill Wheat (my 1963 logbook's flight test pilot entry) about the the C's Vne. 

    1. Wheat noted the 63 M20C had a two-piece windshield. In those days, they picked a number they thought would be Okay. 
    2. Bill went on to say, the 1/4" 201 windshield mod has been tested up to 240mph. My concern was flutter.
    3. Wheat said flutter is not possible in an Mooney. He observed that the control surface hinge-lines are not 90-degrees to the longitudinal axis making flutter impossible. 
    4. The inspiration for 175KT was a talk by Roy LoPresti describing how he got 200mph out of 200hp in 1976. LoPresti, as Mooney's CEO and test pilot came out of the US Atlis missile development program with his specialization in parasitic drag reduction. LoPresti said he took a Mark 21 (lighter and 29" shorter than the J model). LoPresti said they sat outside looking at the AC trying to imagine how to reduce drag. That led to the rake on the cowl & windshield. the square wingtip vorticies drag was reduced with aerodynamic wingtips. 
    5. The drag was reduced around the high psi of the belly's seven panels by removing and designing a single-piece belly pan that smooth the surface in the high psi area. 
    6. Aileron counter-weights were taken out of the slip-stream and put inside the wingtips. 
    7. Wing-fusalage mod smoothed the transition between body and wing. 
    8. It turns out, Mooney bought the North American P-51 wing jig (in the 1950s?) which accounts for the excellent high speed performance. 

    Screenshot 2018-05-22 18.16.21.png

    Screenshot 2018-08-06 18.46.27.png

    • Like 1
  5. 11 hours ago, carusoam said:

     

    .. finding rusty cams takes a specific effort to look for it.

     

     

     

    Please walk us through your technique for searching for a rusty cam during a PPI. Curious minds want to know. 

    A&P COM GLD SEL IFR Dude here.

    (suggestions how to flip pic are welcome, grrr)1794773438_UErJ1ziWSqyB3qcubxwuA.thumb.jpg.44e801eac52338fa7a5370a48101f39a.jpg)

     

  6. 15 hours ago, tomgo2 said:

    @JETmachine, do you own an M20C and interested in a RAJAY kit? 

     

    Tomgo2,

    My 1963 M20C modified is powered by a 1993 IO360A3B6D with 980 TTSN. The mod includes the 1993 M20J cowl and McCulley prop.

    Question: Can a RayJay turbo attach to a fuel injected engine? 

    Question II: The 190kts on the M20C is impressive given the unmodified Cs don't have the LoPresti aerodynamics of the J-models.

    175KT is the shortest bodied M20C, with the 1/4" J windshield, Cowl, one-piece belly-pan, wing-tips, wing-root mod, and the empenage speed mods causing me to wonder how all the drag reduction would play with the RayJay equiped 200hp power.

    We made a two-way pass at sealevel at 55F,  28"mp & "2700rpm on radar at 204mph.

    If the RayJay can be installed on a fuel injected LYC, what will that set me back, and how long would the installation take. Where is your shop. We are in the San Francisco area. 

     

     

  7. 1 hour ago, Spike Kavalench said:

    Well after the surprise of having to do an IRAN overhaul on my engine

     

    Steve, Am I reading your posts correctly? Did the engine go south over the weekend?! If yes, was it from over-boosting the engine with the Ray-Jay Turbo? jt

    Flying from the SF Bay Area over western mountians, I've lusted for a turbo. So, following this thread is much more intersting that sales propagnda.

    NOTE: A good friend has an M20 K. The '63 (light/short) M20C-modified w/200hp leaves the K in the dust up to 5'K when he blows by me like I'm in revears.  Years ago, flying out of Watertown into Oshkosh (80 Mooney formation-yikes) I was wingman to a 231 with the '63C 200hp. In the climbing departure to the I had to power back to maintain position with the 231 (heavier/longer). Again, at 5K, the game is over as the turbo eats my lunch. 

    Question: Can a RayJay be fitted to a IO-360A3B6D, or do they only attach to carburated engines?

     

  8. Installing the M20J Edo-Aire Mitchell electric trim on a '63M20C is an easy power-trim upgrade since the 2A3 Type Certificate is the same for all models.  Problem: the equipment lists obviously changes from year-to-year. So, if there is an Edo-Aire Mitchell electric trim STC out there (or even the STC #) it would be a huge help with the paperwork. Any PM's are appreciated. Cheers! jt. 

     

     

     
     

    13.jpg

    Electric Trim.JPG

  9. On 6/26/2018 at 8:00 AM, aggiepilot04 said:

    I usually fix this issue by opening in Preview (the default app on Mac OS for opening images), rotating, saving, then rotating back to the correct orientation, then saving again.  The shortcut for rotate is Cmd + R, save is Cmd + S.  As long as you do this before uploading, it should upload correctly.

    Aggie, How do you change the order of pictures in an album? jt

  10. 20 hours ago, kortopates said:


    Suggest some nylon spiral wrap. It just looks like it will chaff through in no time.


    Sent from my iPhone using Tapatalk

    Roger that! This picture is from a Mooneyspace illustration.

    175KT is wrapped,  tied-off, and fused for safety given the potential exposure of a short that could lead to a catastrophic electrical fire in the aft-compartment.

    ty for the heads-up. (:

     

    • Like 1
  11. 17 minutes ago, DualRatedFlyer said:

    have youRoger tried downloading the picture (previously uploaded) and then rotating it and re-uploading it?-- as opposed to maddeningly rotating the original

    1

    Roger that! Several flipping iterations resulted in the picture posting properly. It's unclear which change worked. Back to the drawing board. At this point, getting the pic to post right side up is trial and error. Keep hope alive. jt 

  12. aileron.thumb.jpg.6577d80eeb902b51e7ed369faf8e770b.jpg

    FOR SALE: M20 starboard flap and two late model ailerons w/counterweights and 201 wingtips

    LOCATION: Delivery from KHWD possible within reason. The flap will require ($$$) freight. KHWD installation is possible. Additional pics of ailerons and 201wingtips to follow.  All parts are leftovers from the 175KT restoration 20-yrs ago/summer hangar cleaning. PM for prices.

  13. On 6/22/2018 at 3:20 AM, autoalain said:

    Folks,  here are a few pics of the dismantel of a nice m20c in montreal,  real shame. if anyone needs some parts let me know.

    IMG_20180619_110337191.jpg

    IMG_20180619_110353804.jpg

    IMG_20180619_110346887.jpg

     

    16 hours ago, autoalain said:

    Folks,   we had to cut the wing in half,  only way it would fit in truck,  she is now sitting in storage at the museum in st ann de bellevue.

    yep we truck all the planes in, no runway.   have a look at our website,  we are 40 working members, and everything has been donated to

    us,  no government help at all,  just a love of planes.    www.cahc-ccpa.com  

     

     You know, four bolts plus the controls and the wing comes off?! 20-yrs ago an M20 wing from the dismantled was $7K.  

  14. 24 minutes ago, larryb said:

    You would have to wire this a bit differently. The way it is now will not work well. There is a solenoid with a pretty heavy draw that will mess with the battery minder logic.  It is best to wire a little molex plug in parallel with the airplane battery. Don’t use the existing power plug and don’t use the parallel battery.

    Roger that Larry & Don. Will do.

    I was hoping to avoid another connection but the system worked 10/10 when the BatteryMINDer was attached to the BAT terminals using the kit's connectors. The point is, opening the panel to connect the BatteryMINDer everytime the AC is put in the hangar sucks. A separate discreet BNC for the BatteryMINDer will be a more sanitary installation. jt

     

  15. RE picture posting: Can pictures be rotated on this site? How? 

    When a post includes 2 or more pics, can the order/sequence of the pics be changed on this site? How?

    Rotating the original picture on the camera 90* 4Xs and still having it post it here sideways, that effort is over. It is what it is unless there is an edit feature that allows changing the order and rotation of pictures after they have been downloaded to the site.  jt

  16. 1713155311_F8pn2rTTCOuScSZFMvjoA.thumb.jpg.a12e38b77e78a4ee02915f1734222bf0.jpg

    (apologies-re picture rotation)

    The BatteryMINDer is no-op when connected through the external power cable (red plug).

    Add a parallel 12V BAT  between the BatteryMINDer and the AC BAT and the BatteryMINDer charges.

    Connect the BatteryMINDer direct to the AC BAT and charging works normally.

    QUESTION:  Can the BatteryMINDer tend the AC BAT without a 2nd BAT?! How?

    JETmachine

     

    fullsizeoutput_5ac.jpeg

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