std gasser setup help

[geomecc]

ok thanks guys. I really appreciate it i really like this heli. I was able to hover it at my clubs spring fun fly this past Saturday and liked it right off the bat. but my trims were way out. I restored the heli went through everything and i started changing the link adjustment so i wanted to reset the linkage. thanks again

[geomecc]

I have the constant driven tail main gear set up ( which came with another heli) and im trying to see if it fits. is it supposed to be a drop in part? because its interfering with the clutch bell. how is it supposed to be installed?

[geomecc]

I found the info i needed

[geomecc]

did bergen rc make a driven tail main gear assembly as a hop up for another brand of heli's? now that im lookin at the one i have it's similar in design but different than whats in the manual for the intrepid gasser and whats on the sites parts page?

[cbergen]

A long time ago we made driven tail systems that could be used on another popular brand.

Similar but different.

[Intrepid175]

Chris will have to confirm or deny that one. What I remember back in the early to mid 90's, Bergen was making "upgrade" parts for X-Cell helicopters but Larry eventually stopped that and started producing the Intrepid. I started flying them around 1996 and they did not have the fully driven tail at that time. Miniature Aircraft sold an upgrade part called a "slipper clutch" (or something like that) that would also fit the Intrepid. It replaced the collar that Bergen uses at the bottom of the main mast below the auto hub on their helicopters with a exterior threaded version. There was then another cup shaped fixture that threaded on that part. The cup had an o-ring installed in it that matched the bevel on the bottom of the auto hub and drug the main gear and it's tail drive along with the main shaft. It gave the model some tail control in an auto but if you loaded it to any degree, the system would slip. You could adjust the tension but if you put it too tight, the rotor system would be driving the engine until things slowed down enough for the clutch to release. It was an imperfect solution but it worked for the kind of flying we did in those days. No hard core 3D. I was using that system when Larry first released the fully driven tail gear set they sell today. Man, what a difference. I don't like flying any other configuration. Bergen's system might, and I emphasize "might" work on some of the older X-Cells but I'd be very surprised if it would work on anything currently produced (X-Cell or otherwise) without some significant mods. I could be wrong of course. Just a little history from my perspective!

Fly Safe,
Steve R.

Obviously, I was typing this up while Chris was answering the question!!

[geomecc]

I think that's what I have. ill have to order the proper one. the one i have the hub for the crown gear touches the bottom of the tail pinion bearing housing. thanks

[geomecc]

does anyone know of or have a carb throttle arm that would fit a walbro 990 carb? the shaft that comes out of the carb has a 0.1855" diameter

[cbergen]

The throttle arm for our Industrial Twin Carb is .185. Same arm as the standard engine, just a bigger ID.

[geomecc]

did the tail boom diameter change from the old std gasser?after i crashed i stripped the heli at thefield and threw out the damaged tail boom. i am trying to instal the new boom and having a hard time getting the boom into the half spacers at the rear ov the heli and i didnt remember havig to spreading the frames this far apart. are the half round spacers different too with the new boom?

[cbergen]

The diameter has changed, we'll have to get a set of clamps out to you, including the horizontal fin clamp.

Didn't mean to make you think you were losing you're mind.....

[geomecc]

thanks chris. can you include the throttle arm(carb side) for the twin to accomidate the 990 carb i wanna use?thank you again

[cbergen]

Yes I can!! Do you need a short ball on that carb arm?

[geomecc]

yes. the carb is going on my intrepid gasser if that helps

[geomecc]

what length is the carbon fiber rod tail rotor pushrod supposed to be cut to? its not in the manual and i have the std 33" boom

[cbergen]

Depends on which way your tail servo is facing. We don't give a dimension, and I can't give you one, because there are too may variables, such as how far in your tail boom goes into the frame and the tail servo direction.

I glue one end on to the pushrod and let it dry. Center the servo, center the pitch slider on the output shaft, snap the ball link onto the servo wheel ball, then mark the pushrod where it needs to be cut (taking into account the installation of the other end piece).

[geomecc]

are there any flybar lock tools in stock or any used ones i could buy?

[geomecc]

im thinking about stretching my std gasser to extended boom. what are the recommended head speeds if i was running 800mm blades?

[Cletus]

Got my EB setup 1450, 1550, 1650 with 800mm blades per the manufacturer's recommendation. She's four years old this month, minimal maintenance, never an incident and she flies nearly every weekend, holiday and then some!

[Intrepid175]

Originally Posted by geomecc

im thinking about stretching my std gasser to extended boom. what are the recommended head speeds if i was running 800mm blades?

To stretch a standard Gasser to the EB, besides the obvious parts changes related to the tail boom, you'll need to swap the pinion gear from 14 to 12 teeth. With that gearing, the minimum hover rpm is 1450 to insure the clutch remains fully engaged. Maximum rpm is 1650 which keeps the engine within its normal range.

Personally, I really like the EB. That big rotor disk definitely adds to the birds "presence" in the air.

Good luck & Fly Safe,
Steve R.



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