RE: Need help on my new build - throttle and servo jittery
well the servo is fine until i give it throttle and when it finally starts to build rpms then the servo has a mind of its own. i have a new rx coming today and i need to check the esc parameters to make sure its not a nicad.
Posted on: 6/7/2011 11:23 AM by Author "fathead45" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=10561591

Need help on my new build - throttle and servo jittery
Hey guys, havent been around a while but im working on a new build and im having issues. I have a turnigy 125 amp marine esc with no bec, a ubec, and a 2845 watercooled 3600kv motor. the servo is a traxxas 2055 and a traxxass 2 ch 27mhz tx and rx. http://www.valuehobby.com/product_details.php?category_id=41&item_id=344 - motor http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=15133 - ESC http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=10312 - SBEC Now what happens is when i try to give it throttle it will either turn real slow even at full throttle or i can get it to start revving up but then the servo starts moving on its own. now its not even in the water yet. so im wondering if any of you guys have an suggestions. even when i get it to start allowing me to rev the motor and turn ill put it in the water but it will only go 5 ft and then shut off and go into the limp mode. if you need a video i can get it up.
Posted on: 6/4/2011 5:19 AM by Author "fathead45" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=10556155

RE: hope 50 mph rc sled
wow that thing is cool. i have 2 of the polaris rush rides. they have them at radioshack in town for 40 bucks each. i have 2 of them right now. im putting a brushless in one of them. if your wanting one for that price hit me up and we can talk about it b/c i would love to get some hop up parts that you make like the suspension. my email is matt @ Schoolhouseelectronics.com
Posted on: 2/21/2010 12:29 AM by Author "fathead45" in the forum "Unusual R/C"
http://www.rcuniverse.com/forum/fb.asp?m=9521973

RE: Looking for a couple cheap 40amp btushless esc's
see i really like that one. but you cant use nimh battery with it. you can only use lipo which i dont have right now. unless im missing something. i love hobby king. that is where i got my brushed esc for 7 each. im buying my motors there. i just couldnt find a brushless esc in 40 amp that will run both kinds of batterys for dirt cheap, lol. im buying 2 of each so doing it on a budget right now. but if this one wil work with other batterys ill be down.
Posted on: 4/5/2009 7:58 AM by Author "fathead45" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=8650118

Looking for a couple cheap 40amp btushless esc's
im looking for some cheap 40 amp brushless esc's. i will be running lipo and nimh batterys. upto 12volts is a must and bec. let me know where i can find these cheap. thanks
Posted on: 3/26/2009 11:49 PM by Author "fathead45" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=8620685

Pics of my new twin Jet drive boat - 2 mini jets - updated with maiden voyage
Well i finally got her done. it aint pretty but she works. going out on her maiden voyage i hope tonight or tom. here are my specs on it. Motors: 2 Graupner speed 600 race 7.2 ESC: 2 Eagle 30amp brushed esc Receiver: Futaba f600 Transmitter: futaba conquest Servo: Traxxas high torque Rudder: homemade Battery: 7.2v 1800mah for now Hull: Harbor freight special - 50 bucks for the whole kit. does like 20mph out of the box with twin 380 motors with vector steer. i got this hull for 5 bucks off ebay. it is 24" long. I took all parts out of it and cut in my jet drives. everything else feel into place. i hope you all like.
Posted on: 3/18/2009 1:23 PM by Author "fathead45" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=8540159

RE: Pics of my new twin Jet drive boat - 2 mini jets
heres a lil update after i could finally take it into open water. i was kinda happy with it, but not. i would say it was doing between 8-10mph on the water. my other boat does 10mph with a gps. so it wasnt to bad. the rudder did ok, but i want to try the nozzles now. run time with the batterys were about 15 mins before it started to slow down. as for them performing where the drives are, they worked great. no issue besides on a real hard turn. once i get some better motors it will be nice. the 2 600 did ok, but def need more power.
Posted on: 3/18/2009 1:22 PM by Author "fathead45" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=8590853

RE: Pics of my new twin Jet drive boat - 2 mini jets
no there not spooling up. they are bogged down and not enough power to make them go faster. i would have to add more battery to make them speed up and then i still wont get the results i want.
Posted on: 3/11/2009 8:13 AM by Author "fathead45" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=8566098

RE: Pics of my new twin Jet drive boat - 2 mini jets
what would that to high of a kv motor cause??
Posted on: 3/10/2009 9:29 PM by Author "fathead45" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=8564891

RE: Pics of my new twin Jet drive boat - 2 mini jets
any help with a choice on motors???
Posted on: 3/10/2009 4:22 PM by Author "fathead45" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=8563690

RE: Pics of my new twin Jet drive boat - 2 mini jets
alright. i will look there. these are some of my choices http://www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=4195&Product_Name=HXT_2030_(130S)_4300kv_Brushless_Inrunner http://www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=4202&Product_Name=HXT_2040_(130L)_4850kv_Brushless_Inrunner http://www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=4200&Product_Name=HXT_2835_(380S)_3900kv_Brushless_Inrunner http://www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=6668&Product_Name=KD36-50-07S_5000kv_Brushless_Inrunner
Posted on: 3/6/2009 3:15 PM by Author "fathead45" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=8550633

RE: Pics of my new twin Jet drive boat - 2 mini jets
http://cgi.ebay.com/5000-Helicopter-Outrunner-Brushless-RC-Motor-30A-ESC-y_W0QQitemZ270352130778QQcmdZViewItemQQptZAU_Toys_Hobbies_Radio_Controlled_Vehicles?hash=item270352130778&_trksid=p3286.c0.m14&_trkparms=66%3A2%7C65%3A1%7C39%3A1%7C240%3A1318 would 2 of those work??
Posted on: 3/6/2009 1:36 PM by Author "fathead45" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=8550393

RE: Pics of my new twin Jet drive boat - 2 mini jets
i already have 2 speed 600 on this thing and it goes nowhere. i was staying away from brushless because i just didnt have the cash to drop over 100 on motors and esc's. so i went with the 600 as that is what graupner said they recommend. so i seen the 2 300 and thought with less weight and a lil more rpm she might do it. but i think i need to find something that will spin atleast 35k or better.
Posted on: 3/6/2009 1:18 PM by Author "fathead45" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=8550355

RE: Pics of my new twin Jet drive boat - 2 mini jets
lol no frying anything. would 2 speed 300 running at 29k rpm work>??
Posted on: 3/6/2009 7:56 AM by Author "fathead45" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=8549448

RE: Pics of my new twin Jet drive boat - 2 mini jets
well i took her out last night with a 7.2 4000mah battery that dumps 30 amps to the motors and it was horrible. it was barely moving in the water. what is the deal?? do i need more volts?? 2 batterys?? i just dont know. its kinda dishearting thinking it would do alright but to not even come close. what do you guys think?
Posted on: 3/5/2009 8:26 AM by Author "fathead45" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=8545993

RE: Pics of my new twin Jet drive boat - 2 mini jets
lol, yea i ahve them. i dont go in shallow water. i have a big pond behind my house and i wanted to try the rudder before i put on the nozzles. i wanted to try something different. plus with trying to think of a way to control 2 nozzles with 1 servo i didnt want the headache at this time, lol.
Posted on: 3/3/2009 4:27 PM by Author "fathead45" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=8540205

RE: Home built jet drive boat help needed...pics
Not sure why it ended up so heavy. When all the mechanicals are removed the hull is very light. The addition of the speed 700 motor, esc, receiver, jet drive and battery puts it up there pretty quick. This is actually all balsa with several layers of fiberglass so there's not much more I could've done to keep the weight down. Removing the fins and the trim tabs will help a bit. I added both those items as a result of several conversations with a friend who's the 'know-all' when it comes to jet ski's. He was the one that suggested the intake lip, the fins and trim tabs. I guess jet ski's and jet boats are not as similar as we thought. This is the first boat I've ever built so it's definately a learning process as I go. I bit off more than I can chew for my first build but the knowledge I gained was well worth it. The next boat is already on the drawing board and half built. It won't be nearly this big so I'm hoping it's a bit easier. I really appreciate all the help, I'll do everything suggested and see what happens. I'll post a video if I can get it to go.
Posted on: 12/18/2008 3:46 PM by Author "fathead45" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=8258742

RE: Home built jet drive boat help needed...pics
heres the pics
Posted on: 12/18/2008 12:50 PM by Author "fathead45" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=8258326

Home built jet drive boat help needed...pics
my coworker built this boat from scratch. he is using a 40mm scale jet drive by graupner. the boat weighs around 10lbs with everything in it. We tested it today and it hardly pushed any water out and were trying to find out why. he is using a speed 700 with 11.1 lipo. here is the boat. let me know what you guys think.
Posted on: 12/18/2008 12:48 PM by Author "fathead45" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=8258316

RE: Tell me if i have this right - Need info on brushless esc
ok, that is all i needed. thanks alot
Posted on: 12/10/2008 3:42 PM by Author "fathead45" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=8232599

RE: The Unofficial all things Jet drive thread
wow some good info here. im going to tell my buddy to mess with his big jet drive. he is putting one of these in his boat. i told him my 2 minis will outrun his single 40mm scale drive, lol
Posted on: 12/10/2008 1:45 PM by Author "fathead45" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=8232262

Tell me if i have this right - Need info on brushless esc
Ok, im looking at going brushless. i have 2 motors that will be driving 2 mini jet drives. im looking at some 2200kv motors that run about 25 amps. now i want to get away with 1 esc if i can. im looking at getting a 60 or 100amp brushless esc that can handle over 14 volts. i want to run the esc to both motors and run a 14.4 lipo o nimh battery to them. so it will send 7.2 volts to both motors right?? so my question is will this work?? or quite being a cheap skate and get 2 esc to run 7.2 packs.
Posted on: 12/10/2008 1:29 PM by Author "fathead45" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=8232211

RE: Video - Rocket Motor on my boat
lol i know what you mean. most of those other videos are using estes motors. this 29mm had some thrust, lol. were gonna try a 34mm rocket this summer and try to find the limit of the boat. i wouldnt post a lame video, lol.
Posted on: 12/7/2008 8:37 AM by Author "fathead45" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=8220936

Video - Rocket Motor on my boat
http://www.youtube.com/watch?v=farnOMi-5Z4 well some insight on this. me and a coworker work out of town ALOT, so we find stuff to do to kill time. Well he is also in rocketry where he makes his own propellant. so we decided to make a plate to put on top of my boat. this motor is a 29mm motor. after the big flash you will see i had no control b/c of all the thrust. once summer comes around again we will be experimenting more with some bigger stuff. i hope you guys enjoy and get a good laugh out of it.
Posted on: 12/6/2008 11:20 PM by Author "fathead45" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=8220229

What is the brushless equiv. of a speed 600 7.2v??
im new to brushless and im trying to find a motor that is equal to a 7.2v speed 600. i will be running 2 jet drives so i will need 2 of them. and cost is a factor as well. any ideas to help me figure out what i will need would be good. thanks
Posted on: 12/5/2008 1:07 PM by Author "fathead45" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=8215535

RE: A Sad day
i live by lima. but were down in dayton alot for work. any of those ponds good for fishing too, lol. i have a twin prop boat from harbor frieght, but this winter it is getting 2 mini jet drives with speed 600 behind them. i just need to work on it. my coworker has built a custom boat with a scale jet drive with a speed 700 behind it. one day this summer when were working down there we will ahve to meet up and check out our boats.
Posted on: 12/4/2008 8:41 PM by Author "fathead45" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=8213751

RE: A Sad day
there is a hobby shop right there off of 725 and the road that cox aboritum is on. by lonestar steak house. they have a good selection of wood. boats not as much though. i wish it was warmer, we are going to be doing some work in oakwood for the next few weeks and we have a couple of jet drive boats to test out.
Posted on: 12/4/2008 12:06 AM by Author "fathead45" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=8211036

RE: found cheap place for jet drive
ill have to get some pics either tonight or tom up. i have a video of it running, but im trying to get youtube setup but they are not sending the emails. as soon as i get it up ill post the video of a 29mm rocket on the back, lol.
Posted on: 12/2/2008 10:11 PM by Author "fathead45" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=8206995

RE: found cheap place for jet drive
yea that is what me and a coworker thought. we bought 3 mini and the 2 larger scale ones. awesome lil things they are.
Posted on: 12/2/2008 9:31 AM by Author "fathead45" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=8204505

found cheap place for jet drive
http://www.cornwallmodelboats.co.uk/acatalog/graupner_jet.html cheapest place to get graupner jet drives by far. and decent shipping too.
Posted on: 11/30/2008 7:08 PM by Author "fathead45" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=8199102