Hydroguy2 Back in the RV Saddle and Kicking Cancer’s Ass
“CANCER UPDATE:
Long rough ride to get to this point. 14 months since Aurora and I had flown, but today we kicked that cancer a$$. In August I got my medical restored, but I still was weak didn’t feel sharp enough mentally until a few weeks ago. In July, The doctors and others said, it would probably take me a year after treatment, to be able to fly…Ugh. I dropped my insurance to not-in-motion coverage. In the mean time I started the Condition Inspection, finished that last week. The last couple months I put some weight back on, got stronger and feeling almost normal. Woke up this morning and knew today, I’m Flying!”
David Paule
…plugging along on the FAB (RV-3B)
“I managed to screw up the top plate and put another one on order, so I’ll get to redo many of the fitting checks that I’d just completed. What joy.
The glue decision has been resolved for that bottom Titanium plate I made. It’s being glued down with Pro-Seal.I had an unopened container in my freezer and figured this was a good time to introduce it to the room temperature world. The weights shown are to help hold the plate firmly in contact with the fiberglass, and it’s on my kitchen counter because this time of year it’s more reliably warm than in the shop.”
Sanch627 RV-4
…Elevator trim tab cable cutout photos for DrWalker
Piper J3
…UPDATE 912ULS Gearbox Rebuild
“I’m still trying to diagnose vibration roughness when throttling down from cruise RPM. See my post #1 above for full description of the problem. I spoke with Roger Lee (Rotax Owner’s Forum for 912/914 Technical Questions) and he thought problem is most likely carb synchronization. Advanced Power Solutions was also consulted and they offered carb synch as more plausible cause Vs. gearbox.
I’m wondering if anyone has ever hooked up a carb synchronizer in-flight to verify differential manifold vacuum L-R? I brought vacuum hoses from the intake manifolds into the airplane cabin via the side vent. Attached photo shows vacuum hose routing before hoses were completely covered with overlay tape.
Carbs were synched nicely at idle and off-idle before first test flight. The SynchroMate showed a large (4.5 cmHg) difference at full and mid-throttle flight settings. It took two ground adjustments of the left carb throttle cable housing to get a nearly dead-on synch in flight for mid-throttle and above. See photo of SynchroMate in-flight at 5500 RPM. The vibration roughness when reducing throttle from cruise RPM is significantly reduced and not really noticeable now. EGT’s track nicely in the upper RPM range. So, I think carb synch is the root cause of the vibration / roughness problem. To verify accuracy of SynchroMate, I reverse manifold vacuum lines and reading show same but on opposite side of scale.
The problem now is carb sync at lower engine speeds. With carbs now synched for mid-high RPM, the low speeds show manifold pressure differential at 7 cmHg and engine roughness. So, it seems I can’t make engine run happily at slow and fast speeds with same throttle cable adjustment.
Next step is probably to rebuild the carbs and then synchronize from bare bones up.
Has anyone tried a carb synchronizer in-flight to verify differential manifold vacuum L-R? I’m interested to know if synchronization of both carbs can be attained over full RPM range with a single cable setting…”
Skirting_virga
supik
…Subpanel Goodies - Nuts or Nutplates? PIREP
The position of my AHARS had some issues with vibrations so I used a thick doubler with nut plates. Easy removal/replacement but too heavy to be used on every component.
Stevea
…RE: T-405 Bracket Bolt Torque
Here's how it looks on my 6A. Slot in the tank bracket (not visible.....under the washer) was a retrofit. Platenut on the fuselage side was easier....it could be done off the airplane.
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Older issues of the ‘VAF News’ can be found at:
THE VAF LIST (a list of RV-related lists)
“CANCER UPDATE:
Long rough ride to get to this point. 14 months since Aurora and I had flown, but today we kicked that cancer a$$. In August I got my medical restored, but I still was weak didn’t feel sharp enough mentally until a few weeks ago. In July, The doctors and others said, it would probably take me a year after treatment, to be able to fly…Ugh. I dropped my insurance to not-in-motion coverage. In the mean time I started the Condition Inspection, finished that last week. The last couple months I put some weight back on, got stronger and feeling almost normal. Woke up this morning and knew today, I’m Flying!”
WDYDWYRTW? 12 / 7-8 / 2024
...getting this weekend's thread started. I'm at the airport Saturday 0830 enjoying light showers for a couple hours. About to start putting the plane back together after the oil change, but stopped in the parking lot long enough to see if anybody was going to fly (while catching up on the...
vansairforce.net
David Paule
…plugging along on the FAB (RV-3B)
“I managed to screw up the top plate and put another one on order, so I’ll get to redo many of the fitting checks that I’d just completed. What joy.
The glue decision has been resolved for that bottom Titanium plate I made. It’s being glued down with Pro-Seal.I had an unopened container in my freezer and figured this was a good time to introduce it to the room temperature world. The weights shown are to help hold the plate firmly in contact with the fiberglass, and it’s on my kitchen counter because this time of year it’s more reliably warm than in the shop.”
RV-3B Dave's in Colorado
Just a note to say that the surgery seems to have done what it was supposed to Stay tuned to this station! Dave Great news!! :D
vansairforce.net
Sanch627 RV-4
…Elevator trim tab cable cutout photos for DrWalker
Elevator trim tab cable cutout
Does anyone have a picture of the cutout on the forward edge of the left elevator which accommodates the trim cable. Plans show a single hole, adjacent to a matching hole on the horizontal stabilizer rear spar. Given 60 degrees of travel (30 up/30 down) it seems like a single hole would create a...
vansairforce.net
Piper J3
…UPDATE 912ULS Gearbox Rebuild
“I’m still trying to diagnose vibration roughness when throttling down from cruise RPM. See my post #1 above for full description of the problem. I spoke with Roger Lee (Rotax Owner’s Forum for 912/914 Technical Questions) and he thought problem is most likely carb synchronization. Advanced Power Solutions was also consulted and they offered carb synch as more plausible cause Vs. gearbox.
I’m wondering if anyone has ever hooked up a carb synchronizer in-flight to verify differential manifold vacuum L-R? I brought vacuum hoses from the intake manifolds into the airplane cabin via the side vent. Attached photo shows vacuum hose routing before hoses were completely covered with overlay tape.
Carbs were synched nicely at idle and off-idle before first test flight. The SynchroMate showed a large (4.5 cmHg) difference at full and mid-throttle flight settings. It took two ground adjustments of the left carb throttle cable housing to get a nearly dead-on synch in flight for mid-throttle and above. See photo of SynchroMate in-flight at 5500 RPM. The vibration roughness when reducing throttle from cruise RPM is significantly reduced and not really noticeable now. EGT’s track nicely in the upper RPM range. So, I think carb synch is the root cause of the vibration / roughness problem. To verify accuracy of SynchroMate, I reverse manifold vacuum lines and reading show same but on opposite side of scale.
The problem now is carb sync at lower engine speeds. With carbs now synched for mid-high RPM, the low speeds show manifold pressure differential at 7 cmHg and engine roughness. So, it seems I can’t make engine run happily at slow and fast speeds with same throttle cable adjustment.
Next step is probably to rebuild the carbs and then synchronize from bare bones up.
Has anyone tried a carb synchronizer in-flight to verify differential manifold vacuum L-R? I’m interested to know if synchronization of both carbs can be attained over full RPM range with a single cable setting…”
912ULS Gearbox Rebuild...
My friend has 500TT on his RV-12 and is experiencing engine vibration when he throttles back from cruise power setting of 5500 RPM. The engine runs smoothly during climb and at 5500 RPM in level cruise. Ignition check at 4000 is always good. Ignition check in the air is also good. When power is...
vansairforce.net
Skirting_virga
CHTs - How cold is too cold?
Follow-on discussion to my recent thread about metal in the oil filter. I have an 8A with an angle-valve IO-360, and it just so happens I live at high elevation and fly at fairly high altitudes. This engine cools very well. I have a large oil cooler with a variable-air door and I can dial it in...
vansairforce.net
supik
…Subpanel Goodies - Nuts or Nutplates? PIREP
The position of my AHARS had some issues with vibrations so I used a thick doubler with nut plates. Easy removal/replacement but too heavy to be used on every component.
Subpanel Goodies - Nuts or Nutplates?
What's your method of choice for attaching devices to the subpanel? Did you take the time to install nutplates for everything or just go with nuts? Lessons learned?
vansairforce.net
Stevea
…RE: T-405 Bracket Bolt Torque
Here's how it looks on my 6A. Slot in the tank bracket (not visible.....under the washer) was a retrofit. Platenut on the fuselage side was easier....it could be done off the airplane.
T-405 Bracket Bolt Torque
I looked in chapter 8 but can't find it. Where is the torque of the bolt that goes in the T-405 wing attach bracket discussed? This bolt is in the slot that allows the tanks to pull away from the fuselage when you mistakenly fly between trees that are less than 23' apart.
vansairforce.net
OFF TOPIC:
Get your VansAirForce.net Charity Cap!
VAF Charity Cap: Help your charity and promote this site.
Get the cap all the cool kids are wearing! I don’t get a penny. It’s around $15. $5 more if you want your N-number on the back (I put 'STAFF' on the back of mine because it makes me laugh. Put STAFF on yours too if it makes you smile). And down the road $10 to the charity of your choice...
vansairforce.net
Please consider donating yearly to help keep this American 1-person pirate ship afloat:
Older issues of the ‘VAF News’ can be found at:
Doug's Area ...The VAF News, About VAF, My Resume
Pushed out every now and then.
www.vansairforce.net
THE VAF LIST (a list of RV-related lists)
THE VAF LIST (a list of RV-related lists)
The VAF List ...a list of RV-related lists. RV-related things you might want to browse over (a closed post that is sticky and maintained by dr). Link to this in 'Links' in the menu. v/r,dr Small businesses that help bring you this list of RV-related lists: 360 Avionics www.360Avionics.com Ace...
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