GULDUKAT

Built it so long back - can't remember. I also have the 1st production run - you guys have the better version with much better lights.

roydefiant

Started on lights today that are powered by JP navigation light controller. Although all the wiring is done had not tried to turn them on.

key points
1. plugging a battery into controller did not turn lights on. However, when connected to receiver output, and receiver was powered on, you can get lights working

2. apparently the controller is powered solely by the 2S lipo. The servo extension wires provided for all controllers (brake, lights, retract) have the red positive leads all cut so only negative and signal wires get connected from the receiver

3. I fly JETI so set gain leads at -85 to +85 on nav light and retract channel. I did not have wings connected to check those lights but can confirm nose landing lites worked in sync with retract switch - on with gear down. Also checked tail strobe light with same gains and confirmed turns off and on with TX switch. Lights seem to shut off when receiver powered off

4. unknown what will happen when 4 landing lights are plugged into same channel and all 3 strobe lights are plugged into one channel. The posted instructions for the JP light controller says not to plug more than 2 lights at a time into these 3V channels but the PC-21 instruction manual from wind RC clearly shows using one channel for all 4 landing lites and one channel for all 3 strobe lights.

If anyone has experience with plugging more than 2 lights into one of the 3 volt light channels would appreciate any feedback on this forum

5. I have not powered up the formation lights yet which is a separate light system for my PC-21 and powered by a 3S lipo. Not sure how many versions of the wind RC PC-21 have formation lights

roydefiant

Formation lights working. I have them plugged into a separate channel with same gains as mentioned above. Plugged in a 3S lipo. Working nicely and able to turn as shown above.

Or turn off as shown here

roydefiant

Controller wiring on tray above fuel cell. Still need to plug in wings to see which nav light wires go into which JST “Y” connectors. They are all 3V

roydefiant

Working on balancing now. Very clear that despite efforts to keep installed equipment forward, the model is quite tail heavy going with recommended CG in manual. Would be nice to know how far rearward the CG can be safely moved to minimize the amount of nose weight needed!

roydefiant

So it turns out the retract controller does not shut off when RX powered off. I decided to mount 2 switches under the front tray. Above is the switch on the left side which is plugged into a 2S lipo and then into both the retract and brake controller. The other switch plugged into 3S lipo and does lights

roydefiant

Have balanced the fuselage on the wing spar without the wings on or cockpit installed. Was balanced nicely after adding 12oz of weight in the nose. Have subsequently mounted the retract and light batteries on front of equipment tray. Will do complete CG check after weather warms up and can get the model in my garage

David Jackson

My Feedback: (15)

I must be doing something wrong, but I put nearly 20+ounces of weight in the nose of my PC-21 and could only get it to balance if the cockpit was removed. Plane has not flown yet, but will get back to it this summer.

roydefiant

I’m sure I will be adding more weight when I balance with wings on

Fred-WindRC

And now Wind RC has a new scheme for PC21. Don't know if anyone like that.

roydefiant

nice scheme

GULDUKAT

I have no weight added whatsoever. 2 other guys had a custom lead thing weighting 2.4lbs attached to the front of the fuse and by the 10th flight they were removed. I think the factory CG point is off.

F86_SABRE

Can't one calculate the CG and then use a digital weight and balance meter to see the position of the CG compared to the calculated CG position?

roydefiant

Would be nice to know what the safe CG range is !

Fred-WindRC

Hello, Everyone, This is Fred from Wind RC, and i am really appreciated that you discuss the PC21 here, i been following this post from the beginning, and here is what everyone asked recently. Check the CG below, and hope this can help you something.

David Jackson

My Feedback: (15)

The CG shown in post #90 is what was used. Still required more than 20+onces of weight (using Kingtech 100 tp engine and 24x24 five-blade prop) in the nose to balance. I do have the early version of this model. Would like to see the equipment install from others currently flying the Wind RC PC-21.

RC_MAN

My Feedback: (11)

Has the factory made any updates based on customer feedback?

Fred-WindRC

Yes, Reinforcement on the wing root, Modify the horn on the rudder, the fuel tank now is reinforced. And the light controller now is changed into a new design which will be able to use only one.

roydefiant

Would be nice to know what the new measured CG is from the 2 guys that removed the 2.4 lbs of lead from the nose.

roydefiant

Westwindpilot86, did you maiden yet?

Westwindpilot86

Hey Roy, I have not due to a foot injury setting me back about 3 days. Its very close to maidening so maybe this weekend.

roydefiant

The manual states 213.5 mm for CG but sounds like a “CG range” would allow the CG to be moved more rearward. I balanced mine today at 220 mm. It was dead on balanced with a total of 32 ounces in the nose.

roydefiant

Thread #97 was done without cockpit tub