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A Main Hobbies . Boca Bearings . Modefo's RC Helicopters

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Audacity Models Pantera 50 - Tiger 50 > Pantera 50 + Century Head
 
 
Red-Rx7
Senior Heliman
Location: Olathe, KS - USA

Well, tonight was the night I was going to fly. Went through all the pre-flight checks, and ran into an issue with the SwitchGlo unit. It was very intermittent, and wouldn't charge the glo plug enough for it to start. After doing some internet searches, found out that I needed to adjust the ATV for the channel it was on (maxed it out at 140%). This resolved that issue.

Next, the fan hub nut spun off the motor shaft; preventing the motor from turning when I spun the starter shaft. That ended up doing it in for me, as the sun set.

Looks like rain forcast for the rest of the week.
05-06-2008 05:35 AM
 
 
jbeech
rrAdvertiser
Location: Sanford, FL (Orlando area)

Have you flown this machine stock to both get used to it, and to shake it down, before making the conversion?


John Beech - GM (and janitor)
Audacity Models
05-06-2008 11:03 AM
 
 
Learn to Fly
Key Veteran
Location: Yalesville Connecticut

If you need any Sw!tch Glo help let me know. Im a rep!!

I love all of mine, could not fly with out one now.

MAKE SURE YOU HAVE A CAMERA-PERSON!!!!


Jeff
Believe nothing you hear, and half of what you see...
05-06-2008 11:31 AM
 
 
Red-Rx7
Senior Heliman
Location: Olathe, KS - USA

I got her started!

I had some issues with the tempered fan nut (as explained before); in which I finally got that resolved. It took me about 20 minutes to get a decent runout on the engine fan of .004". After putting everything back together, I went outside and it started up.

I have the needle pretty rich, as this is the first time anything has ever been started before. I never flew it, but just let it idle on the ground and going through different ranges of the engine RPM.

As you can see in the picture of the glowplug, the black gunk started building up on it all from one tank. I would have reduced the needle some, but the engine was borderline cold/warm. It just seemed right for the break-in period.



Here are two short video clips (large, have a good connection) of the Pantera spooling up. Please note a few things that I would like some feedback on from anyone:

1) Ground Shakes. It was pretty bad, but I was thinking it would be attributed to the break-in of the engine. Since the engine is running rough with all that fuel, I thought that could be one of the reasons.... On the second video as I started to dial the needle back 4 clicks, it seemed like it got better. Any thoughts?

Note: I do not have the tail frame support rods on. So the tail is a little wobbly.


2) Weird bearing / belt slip noise? When I start to spool it up, it has a higher-pitch squelch that sounds like a belt slipping or a bad bearing. Please watch the video with sound.

I checked the tail belt drive, and it is per instructions. Not overly tight, but enough that it is flexible that when you push the belt together they almost touch (behind the drive pulley).

Thoughts?

Video #1:
http://www.corvettedyno.com/md530/f...firststart1.AVI

Video #2:
http://www.corvettedyno.com/md530/f...firststart2.AVI

Final thoughts:
- The multi-blade head looks sweet!
- The spool-down of the blades take a long time... As you can see in the second video, when I drop the throttle I set it to idle position. Yet, the blades take a good 50-60 seconds to come to a rest! I recall this being quite a bit longer than my Raptors..
05-10-2008 05:18 PM
 
 
jbeech
rrAdvertiser
Location: Sanford, FL (Orlando area)

Those boom steadies are there for a reason!!!!!!!!!

Before further tests, check the tail boom for cracking where it enters the frame! It'll ruin your day if it cracks, trust me.

As for the noise, don't worry about it. The second flight already sounded better. What you're hearing are just the gears wearing in; everything sounds pretty normal for now. Anyway, check the boom and put the boom steadies on. Remember, once the tail is supported by a fusleage you can do without them, but NOT now!

My 2¢


John Beech - GM (and janitor)
Audacity Models
05-10-2008 05:39 PM
 
 
Red-Rx7
Senior Heliman
Location: Olathe, KS - USA

John,

Thanks!

I didn't put them on originally for I was putting the fuse on... But as I started it all and noticed the wobbles... I thought to myself... Ok.. I think I need them.

I will check for cracks and everything to make sure it looks normal, and add the supports in.

Thanks for the call the other night. I made my own crankshaft locking tool (Thick PVC pipe that I sanded down and notched). Also, taking a tad off the collet like you suggested fixed it up.

Thanks,
Mike
05-10-2008 05:43 PM
 
 
jbeech
rrAdvertiser
Location: Sanford, FL (Orlando area)

I'm not in the habit of tech suppport responses at 10-11Pm, but I'm glad I was able to help. Keep us posted pal.


John Beech - GM (and janitor)
Audacity Models
05-10-2008 05:52 PM
 
 
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Audacity Models Pantera 50 - Tiger 50 > Pantera 50 + Century Head
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