START HERE |
|
Register | FAQ | PM | Events | Groups | Blogs | Calendar | Mark Forums Read |
Unregistered
|
Bergen R/C Helicopters Bergen Intrepid 90 Intrepid Turbine Observer Industrial Twin Observer Turbine Support Forum |
|
LinkBack | Thread Tools | Display Modes |
03-16-2012, 12:12 PM | #1 (permalink) |
Registered Users
Join Date: Sep 2006
|
Crashed Gasser
I bought a crashed gasser without a tail and I don't know if it was a EB or not. Is there a difference between the two birds other than the longer tail boom?
|
Sponsored Links | |||
Advertisement |
|
03-16-2012, 01:11 PM | #2 (permalink) |
Registered Users
Join Date: Aug 2009
|
Look at the front radio tray. On the standard gasser, the radio tray sticks out about 4 inches beyond the front canopy posts.
The EB gasser has a much longer radio tray so weight can be attached further forward to compensate for the tail-heavy EB. The gear ratio might be be better suited for one or the other, too. I'm sure when you rebuild it, you can rebuild it as either the standard or EB. |
03-16-2012, 03:17 PM | #3 (permalink) |
Registered Users
|
The radio tray is one way to tell. The gear ratio is a more certain way IMO. The EB will have a 12 tooth pinion gear. The standard Gasser will have a 14 tooth pinion.
|
03-16-2012, 03:38 PM | #4 (permalink) |
Registered Users
Thread Starter
Join Date: Sep 2006
|
Thanks guys, Looks like it is a standard gasser. I picked up a boom that is 33 inches, a little longer than the boom on my nitro Intrepid. Is this the length of the EB? Should I cut it down or just install it? If I do install it, are there other changes that must be done such as a longer servo tray and different pinion gear?
Here is a question for a real sleuth. The tail was broken off the body but the frame looks fine. The spindle was bent, but the damage I have never seen before on a heli, is that the bell housing blew apart and the clutch is broken in half. What could cause that? |
03-16-2012, 04:11 PM | #5 (permalink) |
Registered Users
Join Date: Apr 2009
|
An engine at WOT overspeeding and overheating the clutch???
|
03-16-2012, 04:23 PM | #6 (permalink) | |
Registered Users
|
Quote:
Fly Safe, Steve R. |
|
03-16-2012, 05:12 PM | #7 (permalink) |
Registered Users
Thread Starter
Join Date: Sep 2006
|
Thanks for your input. I'm gonna ask a few more nube questions because I haven't had a gasser since the 80's (kalt baron). I am assuming I have the 23 engine, there might be markings on it but I can't see them. I have not taken the bird apart yet, I will wait until I have all the parts because I have found that pieces walk away when they aren't connected.
There is a black wire hanging off the engine, does this connect to somewhere as a ground? I do have a tach to check the head speed. I came with a top of the line Futaba radio(my first). It is a FP-T8SGH-P, it set me back $500 when it was new. I saw one sell on ebay for ten bucks recently LOL. I've checked the head speed at just below hover while the bird was still on the ground, but how do you check it off the ground? I just can't imagine getting close to a bird in the air, I have too much respect(fear) of the damage they can do so fast. |
03-16-2012, 05:37 PM | #8 (permalink) |
Registered Users
Join Date: Aug 2009
|
You're going to want a helicopter tachometer. I think you've already figured out why your plane tach is neither safe nor practical for helicopter use.
Since you can't hold the tach while you fly, you'll need a friend to operate the tach for you. Ideally, you find a friend that owns a tach, so then that way you don't have to buy one. If you can't find someone local, find yourself an OPTICAL heli tach (or find a local who has one). Some good ones include the Miniature Aircraft tach or the Model Avionics Sky Tach. New, they're around $80. You might find a used one for $40-$50. Don't waste your time with any of those iPhone "heli tach" apps. |
03-16-2012, 06:30 PM | #9 (permalink) |
Registered Users
Thread Starter
Join Date: Sep 2006
|
Thanks for the info. I did a search and now know what a real heli tach is. I found a Turnigy Heli-Tach for under $35 brand new. I have always just gone by ear and feel to get the sweet spot head speed but for this bird I will do it properly.
|
03-16-2012, 07:27 PM | #10 (permalink) |
Registered Users
Join Date: Apr 2009
|
I've seen that Hobby King "yellow" tach and it's decent. Being "hard-core" in the hobby I've got the "Check=Master II" which includes an optical tach, servo tester, contact thermometer, along with a very good heli sky tach. Another plus is the internal NiMh rechargeable battery pack so there's no battery changing every two months like the others.
http://www.amainhobbies.com/product_...ne-Heli-Tester
__________________
A helicopter in flight is a working demonstration of all the basic physical laws of the universe in action. Member: AMA 928457 - IRCHA 3449 |
03-16-2012, 10:05 PM | #11 (permalink) |
Registered Users
|
CrashandBurn, the wire on the back of the engine is a ground wire. On airplanes, it's attached to ground through a switch to kill the ignition. On helicopters, it's generally ignored (killing the engine is done through closing off the carb) but can also be used with a governor, usually a Futaba GV-1 through a device called a Stator Gator that converts the ignition signal from the wire to something the GV-1 can use as a speed sensor.
|
03-18-2012, 09:00 PM | #12 (permalink) |
Registered Users
|
I think this is the best tach on the market.
http://www.heliproz.com/prodinfo.asp?number=113725 It is easy to use, see and its' battery lasts a long time. Lou
__________________
Vector 550 Quad/Octo Multirotors DJI WooKong Multirotor Controllers Twin Bergen 44 Magnum Turbines - KERO Start FBL www.circlecityhelis.com |
03-19-2012, 08:12 AM | #14 (permalink) |
Registered Users
|
You guys are great, I don't even know why I hang out here anymore!!
33" is the standard length for the tail boom, but it MAY have been 31 1/4 in the past. With a longer boom you'll also need the TT to be longer and the tail pushrod. But if all of this needs replacing anyway, just cut to fit. Call me old school, I like the MA tach from Heliproz. Saw them on sale recently for $89..but currently out of stock.. Just a suggestion, but it may be beneficial to do a complete teardown now, then you can order all the parts you need at one time, instead of finding later that you need this thing, then another thing, etc, etc.
__________________
Chris D. Bergen Bergen R/C Helicopters |
03-20-2012, 07:14 AM | #15 (permalink) |
Registered Users
|
You know you call to much when Mary Ann knows your voice right off the batt.
|
03-20-2012, 04:35 PM | #17 (permalink) | |
Registered Users
|
Quote:
Lou
__________________
Vector 550 Quad/Octo Multirotors DJI WooKong Multirotor Controllers Twin Bergen 44 Magnum Turbines - KERO Start FBL www.circlecityhelis.com |
|
03-20-2012, 08:00 PM | #18 (permalink) |
Registered Users
|
HA!! That's what I told Kevin today!! LOL.
__________________
Chris D. Bergen Bergen R/C Helicopters |
03-20-2012, 08:57 PM | #19 (permalink) |
Registered Users
Join Date: Aug 2009
|
that's funny. I called in January some time and the first thing Mary Ann asked, "Who is this? I don't know the sound of your voice yet."
|
03-24-2012, 10:35 PM | #20 (permalink) |
Registered Users
Thread Starter
Join Date: Sep 2006
|
I'm rebuilding the bird(aka performing a autopsy) and Chris was right, I should have taken it apart and then ordered parts. I have a nitro Bergen that I bought used but talked to the guy that I bought it from and was confident in its construction. I have flown it for four years with no problems. To tell you the truth, The birds look so complicated that I didn't want to disassemble it till I had to. Now that I am taking my gasser apart, it seems like logical simplicity. One things I have noticed that I have never seen before is that the clutch isn't bolted to the engine, it is just held on to the engine by the Delrin bushings and held down by the 6mm collar(which is missing). Is this correct?
I have to admit that not only am I running on a shoestring budget, but the shoe string is tied together with a knot. I bought a tail off of a different forum. Now I know I bought a obsolete tail that doesn't have parts support. Oh well. At least I have the 23 engine and I fly like a old man. I also bought a clutch bell that has 13 teeth, will this work, what's it for? Luckily when I bought this crashed bird I also bought a 14 tooth bell so I think that will work. On a side note, I called Bergen to order the parts and was taken aback to have Chris answer the phone. It was like being a groupie and talking to a rock star. It was akin to talking to Dieter Schluter. Here is a after thought, now that I have removed the carb and muffler, do the gaskets need to be replaced? Should the muffler just be epoxied back on? Last edited by CrashandBurn; 03-24-2012 at 11:49 PM.. |
Thread Tools | |
Display Modes | |
|
|