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Posted by SeaEraCaptain | Apr 04, 2020 @ 11:30 PM | 4,156 Views
During my time hunkering down due to the Coronavirus pandemic I have returned a Carl Goldberg Super Chipmunk to flying condition.

I picked up the airplane at the Westminster Maryland RC Swap Meet in 2017 or 2018, until recently I haven't had time to get it ready.

This airplane has been built immaculately, it is covered in monokote in the traditional Art Scholl scheme.

The airplane is fitted with an OS 91 Surpass II 4 Stroke Engine; stock muffler; Zinger 14 x 6 propeller; Futaba servos; Futaba S3008SB receiver and Futaba 10J transmitter.

During set up of the airplane I discovered the prior owner left behind a nice microswitch activated glow driver. I just had to trim the throttle servo arm slightly to ensure that it only comes on at or below 1/4 throttle. It is activated by an on off switch on the outside of the fuselage. When the airplane is not in use I make sure to leave the throttle servo at 1/3 throttle or higher to avoid engaging the microswitch in case the external on - off switch should get bumped. The sub C cell that lights up the glow plug was still OK, I was able to charge it and it does hold a charge.

I did make some modifications to the throttle linkage, it is the type that goes out past the carb throttle linkage and then hooks back to it. As it was it went out a little too far allowing the piano wire to flex some so it did not open the throttle correctly. I cut some of the wire off and shortened up the linkage back at the servo arm to account for
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Posted by SeaEraCaptain | Apr 04, 2020 @ 05:00 PM | 3,639 Views
During my time hunkering down due to the Coronavirus pandemic I have returned a vintage Joe Bridi Dirty Birdy 60 pattern airplane to flying condition.

I picked up the airplane at the Lebanon PA RC Swap Meet in early March - that was one of the last normal things I was able to do before the onset of the pandemic.

This is a kit built verion of the airplane - it has been very nicely painted by it's prior owner.

The airplane is fitted with an OS 61 SF Engine; stock muffler; Master Airscrew 12 x 8 propeller; Tru Turn spinner; JR Servos; Futaba S3008SB receiver and Futaba 10J transmitter.

The prior owner said he did fly the airplane with an OS 61 size engine - that is true because the 61 SF dropped right into the airplane and the Tru Turn spinner with it's flush backplate fit right up to the nose with about 1mm or less clearance. That is as close as I would ever want the spinner to be to the airframe.

The prior owner did add some weight to the rear of the fuselage - after fitting my gear to the airplane I did find that it was a little on the nose heavy side but not unacceptably so. The battery pack is mounted behind the servos in the fuselage as far back as I could get it without having to do surgery (it sits in the main fuselage area toward where the wing bolts are - its securely mounted out of the way to the top side of the inner fuselage).

I fly off a grass field so I ditched the small wheels that were on the airplane in favor of 2.75" wheels. There's a
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Posted by SeaEraCaptain | Jun 23, 2019 @ 11:15 PM | 3,932 Views
I have returned a vintage Kwik Fli Mk III pattern airplane to flying condition.

This is the Graupner version of the airplane - it was very nicely recovered in the original Phil Kraft color scheme by it's prior owner.
The airplane is fitted with an OS 46 AX engine; Mac's muffler; Master Airscrew 11 x 6 propeller; Tru Turn spinner; Hitec Servos; Futaba S3008SB receiver and Futaba 10J transmitter.

After completing break in procedures on the new OS motor today I test flew the airplane.

The first flight was with the engine running very rich to continue breaking it in - just a few laps and figure 8's around the field for trimming. The airplane required minimal aileron trimming and some down elevator.
Trimming and test flying were made more difficult due to 10-15 mph direct cross winds from the north.
Upon landing it was noted that if the airplane carries a little too much speed that it will float and likely require a go-around.
Subsequent flights featured further engine tuning closer to full power. Aileron throw was increased slightly to improve roll rate, rudder and elevator throws were set up properly and did not require changes.
The airplane has excellent vertical and level flight speed - the engine / muffler / propeller combo is correct for this airplane.
Basic aerobatic rolls / loops and stall turns were made in flights 2-5.
The airplane does not spin well (hardly at all) with it's current settings - attempts to experiment with more radical aileron throws
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Posted by SeaEraCaptain | Dec 06, 2017 @ 12:52 AM | 3,755 Views
Pictures of an OS S-30 RC, OS 46 FX (including shots inside cylinder to confirm no liner peel) and an OS SX 50 (the SX 50 will need bearings)....Continue Reading
Posted by SeaEraCaptain | Jul 11, 2016 @ 06:38 PM | 4,188 Views
The Saito 80 Engine needs bearings, it was in my Top Flite Contender. I put about 30 flights on it before it started to emit a "super charger" type whine. It ran great but I removed it and swapped in another Saito 80 - I was afraid the engine could sustain damage if I continued to run it with the failing / worn bearings.

The carburetor is new in the package. See the photo for the part number.
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