Roo guts?
09-20-2002 | 07:44 PM
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From: MN
Roo guts?
Hey folks...
I'm getting ready to build a Kangaroo and wanted to post a question or two. Thanks to Don at Planes Plus I'm all set for in the undercarriage department and the kit is about as complete as one could hope for. That just leaves servos, speed / thrust limiter, fuel tanks etc... So here we go...
Servos... JR digitals or Hitech? Price seems pretty close with Hitech having the advantage and as far as I can tell performance is damn near the same.
Fuel Tanks... I'm thinking the 2-liter Pepsi bottle is not the best route to take. What have some of you folks used? I see Todd has some sort of Kevlar tank in his. Where does a guy find one of those?
Speed / Thrust Control.... I'd like to keep the P120 from pushing the Roo to warp speed but want to have max thrust for take off. I'm guessing a speed limiter is the only way to do this. Any suggestions as to where I learn more about my options?
Remote fuel shut off... I've never felt the need for this in other models but I'd like to explore this option as well. What's out there in the lines of miniature fuel valves?
Thanks in advance for any suggestions.
BSEC
I'm getting ready to build a Kangaroo and wanted to post a question or two. Thanks to Don at Planes Plus I'm all set for in the undercarriage department and the kit is about as complete as one could hope for. That just leaves servos, speed / thrust limiter, fuel tanks etc... So here we go...
Servos... JR digitals or Hitech? Price seems pretty close with Hitech having the advantage and as far as I can tell performance is damn near the same.
Fuel Tanks... I'm thinking the 2-liter Pepsi bottle is not the best route to take. What have some of you folks used? I see Todd has some sort of Kevlar tank in his. Where does a guy find one of those?
Speed / Thrust Control.... I'd like to keep the P120 from pushing the Roo to warp speed but want to have max thrust for take off. I'm guessing a speed limiter is the only way to do this. Any suggestions as to where I learn more about my options?
Remote fuel shut off... I've never felt the need for this in other models but I'd like to explore this option as well. What's out there in the lines of miniature fuel valves?
Thanks in advance for any suggestions.
BSEC
09-20-2002 | 07:58 PM
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From: Los Gatos,
CA
Roo guts
BSEC
Call Tam
www.tamjets.com
He will hook you up with all the things you listed at a good price.
The roo does not need tons of power for Takeoff. Unless of course you are taking off of grass. My best takeoffs with the roo are when I only used 1/2 power with a P-120 or equiv. Too much power and it can get a little squirly.
Hope this helps.
Call Tam
www.tamjets.com
He will hook you up with all the things you listed at a good price.
The roo does not need tons of power for Takeoff. Unless of course you are taking off of grass. My best takeoffs with the roo are when I only used 1/2 power with a P-120 or equiv. Too much power and it can get a little squirly.
Hope this helps.
09-20-2002 | 08:33 PM
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From: Daytona Beach
Roo guts?
BSEC...
Servos: well...you listed the two I would choose so I guess it is just personal choice now....I am using JR8411's on the elevons, hitec Digi on the speed brake, 70oz on nose gear and voltz on the rudders.
Fuel tank: Get the 100oz tank from Don Kanak, I started with the 2 liter soda bottle, switched to the kevlar 66oz for safty reasons then switched again to the 100oz tank from Don for better flight times (9 min as opposed to 5)
Speed sensor: well, if using a p-120 get Jetcats sensor if you must have one (cruise option is pretty cool!) and they work great. Dont really need it though since you can limit your rpm to whatever thrust ratio you want. I have mine turned down to 23 # which gives me unlimited vert with a top end around 200mph. Left stick works best for speed control! Max thrust on takeoff is unnecessary!!! Whats the remote fuel shutoff for? Electronic shutdown and manual valve should do but you could easily tie a servo to the manual valve if you really want it. I am using a festo shutoff valve, I beleive BVM has them.
Best bet with the roo is....Keep it simple! No need for gyro or limiter if set up correctly! Less you have on board the less you have to fail. Just make sure you get 90 deg on your speed brake.
Feel free to email me if you have any specific questions...
Regards,
Todd
Servos: well...you listed the two I would choose so I guess it is just personal choice now....I am using JR8411's on the elevons, hitec Digi on the speed brake, 70oz on nose gear and voltz on the rudders.
Fuel tank: Get the 100oz tank from Don Kanak, I started with the 2 liter soda bottle, switched to the kevlar 66oz for safty reasons then switched again to the 100oz tank from Don for better flight times (9 min as opposed to 5)
Speed sensor: well, if using a p-120 get Jetcats sensor if you must have one (cruise option is pretty cool!) and they work great. Dont really need it though since you can limit your rpm to whatever thrust ratio you want. I have mine turned down to 23 # which gives me unlimited vert with a top end around 200mph. Left stick works best for speed control! Max thrust on takeoff is unnecessary!!! Whats the remote fuel shutoff for? Electronic shutdown and manual valve should do but you could easily tie a servo to the manual valve if you really want it. I am using a festo shutoff valve, I beleive BVM has them.
Best bet with the roo is....Keep it simple! No need for gyro or limiter if set up correctly! Less you have on board the less you have to fail. Just make sure you get 90 deg on your speed brake.
Feel free to email me if you have any specific questions...
Regards,
Todd
