RCHeliJim
09-22-2005, 12:59 AM
September 2005
Every once in a while a new heli product comes out that is truly remarkable. The 50 sized heli market has been booming recently and all manufacturers are scrambling to feed the appetites of the 50 sized pilots. During this frenzy a number of new exhaust systems have been created. The latest of these pipes is the Hatori SB-50 “Krause” Special. This pipe was designed with the OS 50 Hyper motor in mind and is an amazing product. A number of pilots have mentioned the $125 price tag as un-reasonable, but once you have seen what this pipe can do, the price seems tame in comparison.
http://www.helifreak.com/album_mod/upload/4762e3347883eee9c283eee72895a3d2.jpg
As you can see, this pipe is huge in comparison to the standard 50 sized pipe. It is actually a re-designed 70 sized unit. Jason Krause played the major role in designing and testing this pipe. It is mounted using the floating double o-ring/standoff setup that a number of the larger Hatori pipes use. The pipe comes packaged in a nice yellow box with all the hardware, an exhaust deflector, and a half-sheet instruction page. As the instruction page leaves a little to be desired, lets walk through the install – its quite simple actually.
http://www.helifreak.com/album_mod/upload/8d4292b395b08bbe2cfc6a3bc51aaa39.jpg
The first thing you need to do after unpacking the pipe and hardware is find the tank pressure fitting and install it in the threaded hole in the pipe. I use red threadlock on this as I don’t foresee a reason to want to remove it and I certainly don’t want it coming off in flight!! Now, locate one of the 3 – holed mounting plates (they include two in the hardware pack, but you will only need one). The instructions call for some Dremel Cutoff action here. Just use a standard cutoff wheel on your Dremel and remove the entire bracket just to the side of the 2 closest bolt holes as seen in the picture above. You will be left with a bracket around an inch or so long.
Next, take one of the long standoffs from the hardware pack (again, there is an extra one included) and one of the M3 hex bolts and bolt the standoff to the bracket (don’t forget the threadlock). Once this is done, it is time to mount the bracket to the heli. This mounting position may vary from heli to heli, the way I have illustrated it is for a Raptor or Stinger heli. You will need to remove the upper motor mount bolt and use it to secure the bracket to the frame, as seen below, again do not forget your threadlock.
http://www.helifreak.com/album_mod/upload/7955f813fe84d9bcb8b908acf7ee2305.jpg
I like to install the header to the pipe before bolting it up to the motor, this way I can make sure the o-rings get in right and aren’t hammered. The easiest way I have found to get the header into the pipe is to first gently rock the first o-ring inside the pipe. Now your second o-ring will be resting on the lip. What has worked for me at this point is to place the header on a flat surface and gently press the whole pipe down on it – as straight as possible. If you press it down square, the o-ring will go in straight. Just check your work as you go and you will get it. The completed assembly should look like this.
http://www.helifreak.com/album_mod/upload/c36375c69b3dd629a9d02bb2ac3210d1.jpg
The clamping system is where the SB-50 fails us a little bit. The included clamps are cheap looking and the included nuts and bolts don’t quite cut it for me. I replace all the bolts but one (the standoff isn’t tapped that deep) with 14mm ones and then use locknuts in the place of the standard ones included.
The next step is simple; you bolt the header to the motor using loctite and whatever gasket method you prefer. Next, place one clamp behind the pipe and the other in front and line them up with the standoff. Specifically, line up the rear hole of the clamps with the threaded portion of the standoff. You need to place a couple of washers between the clamp halves as you put in the M3 bolts. Loosely attach the clamps to the standoff and to eachother on top. Next, on the bottom of the clamps, I like to use old Raptor bushings (the bronze guys) instead of a stack of washers to space the clamps apart. Place one bushing between the clamps at each bolt point and then put the bolts and locknuts on. If you don’t use some spacers in the clamp, you run the risk of crushing the pipe as the clamps are VERY tight. Check the alignment of everything and then tighten all the bolts up at this point. Attach your deflector and tank pressure line and you will be done!! See pics below.
http://www.helifreak.com/album_mod/upload/c87139c22cfc815c03d49fa5bffa7bd5.jpg
http://www.helifreak.com/album_mod/upload/31ed25251af0dae1c21293f2fa33ed79.jpg
This pipe is awesome in flight. The noticeable power increase and smooth running characteristics cause a “perma-grin” to appear on the pilot. The pipe runs well from idle to full throttle. I noticed an immediate and large power increase on my heli from just installing this pipe. Climbout speed is now close to a 90 sized ship!! The sweet, quiet sound the heli makes on this pipe is just a bonus, but worth mentioning.
This pipe is a real winner, and although it is expensive and has a cheap mounting system, I highly recommend it. Thumbs up to Hatori and Jason for this pipe.
Every once in a while a new heli product comes out that is truly remarkable. The 50 sized heli market has been booming recently and all manufacturers are scrambling to feed the appetites of the 50 sized pilots. During this frenzy a number of new exhaust systems have been created. The latest of these pipes is the Hatori SB-50 “Krause” Special. This pipe was designed with the OS 50 Hyper motor in mind and is an amazing product. A number of pilots have mentioned the $125 price tag as un-reasonable, but once you have seen what this pipe can do, the price seems tame in comparison.
http://www.helifreak.com/album_mod/upload/4762e3347883eee9c283eee72895a3d2.jpg
As you can see, this pipe is huge in comparison to the standard 50 sized pipe. It is actually a re-designed 70 sized unit. Jason Krause played the major role in designing and testing this pipe. It is mounted using the floating double o-ring/standoff setup that a number of the larger Hatori pipes use. The pipe comes packaged in a nice yellow box with all the hardware, an exhaust deflector, and a half-sheet instruction page. As the instruction page leaves a little to be desired, lets walk through the install – its quite simple actually.
http://www.helifreak.com/album_mod/upload/8d4292b395b08bbe2cfc6a3bc51aaa39.jpg
The first thing you need to do after unpacking the pipe and hardware is find the tank pressure fitting and install it in the threaded hole in the pipe. I use red threadlock on this as I don’t foresee a reason to want to remove it and I certainly don’t want it coming off in flight!! Now, locate one of the 3 – holed mounting plates (they include two in the hardware pack, but you will only need one). The instructions call for some Dremel Cutoff action here. Just use a standard cutoff wheel on your Dremel and remove the entire bracket just to the side of the 2 closest bolt holes as seen in the picture above. You will be left with a bracket around an inch or so long.
Next, take one of the long standoffs from the hardware pack (again, there is an extra one included) and one of the M3 hex bolts and bolt the standoff to the bracket (don’t forget the threadlock). Once this is done, it is time to mount the bracket to the heli. This mounting position may vary from heli to heli, the way I have illustrated it is for a Raptor or Stinger heli. You will need to remove the upper motor mount bolt and use it to secure the bracket to the frame, as seen below, again do not forget your threadlock.
http://www.helifreak.com/album_mod/upload/7955f813fe84d9bcb8b908acf7ee2305.jpg
I like to install the header to the pipe before bolting it up to the motor, this way I can make sure the o-rings get in right and aren’t hammered. The easiest way I have found to get the header into the pipe is to first gently rock the first o-ring inside the pipe. Now your second o-ring will be resting on the lip. What has worked for me at this point is to place the header on a flat surface and gently press the whole pipe down on it – as straight as possible. If you press it down square, the o-ring will go in straight. Just check your work as you go and you will get it. The completed assembly should look like this.
http://www.helifreak.com/album_mod/upload/c36375c69b3dd629a9d02bb2ac3210d1.jpg
The clamping system is where the SB-50 fails us a little bit. The included clamps are cheap looking and the included nuts and bolts don’t quite cut it for me. I replace all the bolts but one (the standoff isn’t tapped that deep) with 14mm ones and then use locknuts in the place of the standard ones included.
The next step is simple; you bolt the header to the motor using loctite and whatever gasket method you prefer. Next, place one clamp behind the pipe and the other in front and line them up with the standoff. Specifically, line up the rear hole of the clamps with the threaded portion of the standoff. You need to place a couple of washers between the clamp halves as you put in the M3 bolts. Loosely attach the clamps to the standoff and to eachother on top. Next, on the bottom of the clamps, I like to use old Raptor bushings (the bronze guys) instead of a stack of washers to space the clamps apart. Place one bushing between the clamps at each bolt point and then put the bolts and locknuts on. If you don’t use some spacers in the clamp, you run the risk of crushing the pipe as the clamps are VERY tight. Check the alignment of everything and then tighten all the bolts up at this point. Attach your deflector and tank pressure line and you will be done!! See pics below.
http://www.helifreak.com/album_mod/upload/c87139c22cfc815c03d49fa5bffa7bd5.jpg
http://www.helifreak.com/album_mod/upload/31ed25251af0dae1c21293f2fa33ed79.jpg
This pipe is awesome in flight. The noticeable power increase and smooth running characteristics cause a “perma-grin” to appear on the pilot. The pipe runs well from idle to full throttle. I noticed an immediate and large power increase on my heli from just installing this pipe. Climbout speed is now close to a 90 sized ship!! The sweet, quiet sound the heli makes on this pipe is just a bonus, but worth mentioning.
This pipe is a real winner, and although it is expensive and has a cheap mounting system, I highly recommend it. Thumbs up to Hatori and Jason for this pipe.