Monday, November 14, 2016

New FE "P" 4S SAW Record - 138MPH

NEW 4-Cell "P" 138MPH / 222KMH SAW RECORD
This past weekend the last ever SAW event was held at the Legg Lake just outside Los Angeles. Brian Buass set a new very impressive record with his heat racing FE-4S "P" rigger with a set of SAW sponsons on it.

Update - Brian Buass has been so kind to let us know what equipment he used! See below, this is his own info copy and pasted from International Waters forum.

I'm going to do something I rarely do: Here's the entire setup.
Disclaimer*** this setup is right at the very edge of the equipment capability!!! Use at your own risk. This boat is a product of 3 years of tuning.

• Hull: Raptor tub, SAW front sponsons and no rears
• Motor: TP3650 2Y 3080kV
• ESC: Castle Creations Edge Lite 200 with added cooling tubes and conformal coating
• Batteries: Dinogy Graphene (4S2P 3300's)
• Prop: ABC 1823-19-38 (2) cll S/B (snowman prep)
• Driveline: .150 double square cable with teflon liner into Hyperformance outboard stub shaft

We don't do this stuff in a vacuum. Thanks to my friends for all the help and brain storm sessions over the years: Mark, Darin, Tyler,  Jim & Joe. In other words, the usual suspects!
We're not done yet.

Finally, here's the reason for posting the info: It's essentially an off the shelf system. It's proof of what can be done with the incredible equipment that's available to all of us. It's also a reminder how careful we all need to be with how and where we run these things, be safe. Last but not least, it's a starting point and an invite to anyone who might be interested in joining us at time trial events. These events are great fun both on and off the water.

/ Brian "Snowman" Buass

Friday, October 28, 2016

Looking for JAE 45GT pics

Looking for pictures on the JAE 45GT kit from ZippKits
Is there anyone that has an JAE 45GT that can help us out with some pics of a complete boat and/or video of it running?

The pics and/or video will be used for a product article/promo.

(Fyi: the earlier question for tech-info of it is solved)

If you have any pictures or video please e-mail them (or links) to me ->

Thanks in advance! :)

Saturday, October 22, 2016

R/C Båt Träff och Höstmöte 2016

R/C Båt Träff & Höstmöte 2016

Datum: Lördagen den 19 November

Samling: 09.30

Start: 10.00

Lunch: Om ni vill ha lunch så kostar den 130:- i jämna kontanter (inte Swish). I dagsläget lutar det år chilli- eller köttgryta, sallad, bröd & dryck samt fika. Om inte det passar får ni åka iväg till McDonalds eller Max! ;)

Anmälan: Obligatorisk senast Söndagen den 13:e November till - var god notera hur många ni kommer och hur många lunch.

Dagordning (provisorisk):
• Hydro FE-4S: Hur många bygger nytt inför 2017? Förslag på ändringar?

• Off-Shore FE-4S: Är O-sektionen redo för att ta fram en elklass till 2017/2018?

• SM prisutdelning 2016 (H3.5 & H15)

• R/C båt verksamheten säsongen 2016...

• Vad finns att göra till kommande år för att få tillbaka intresset för R/C båt?

• R/C Båt Träffar 2017: Var, hur många, och när?

• Förslag att den första R/C Båt Träffen bör vara i slutet av Maj och den första tävlingen tidigast 2 veckor efter det för att ge folk en bättre chans att hinna testa innan de börjar tävla...

• Finns det arrangörer (och tävlande) för SM-tävlingar 2017?

• Övriga frågor

• Efter det är klart så fikar vi och snackar allmänt om R/C båtar...

R/C Båt är KUL - Välkomna!

Friday, October 21, 2016

JAE 21GT from Zippkits

JAE 21GT Heatracing Kit from ZippKits

Zippkits has released an updated version of their popular 3.5 cc hydro called JAE 21GT (G stands for Geraghty and T for Truex).

• Optimized for Heatracing by Martin Truex Jr
• Handles rough water better with improved cornering
• Total Length: 35" (889 mm) vs the JAE 21G2 Length: 31.14" (791 mm)
• 3" Longer tub vs the JAE 21G2
• After-plane length (end of ski to end of sponson ride pads): ?
• Engine center to end of ski length: ?
• Lower tub sides
• Narrower Ski width
• Sponsons ride-pad AoA: ?
• Ski AoA: ?
Weight: aprox. 1940 g (RTR without fuel)
• New much thicker turn-fin made of 7075 aluminium (.093"/2.36 mm!)
• New aluminium sponson tube inserts
• The kit's lazer-cut parts have been upgraded so it will stay truer and straighter during assembly
• Pre-drilled motor mount holes for Zippkits new Super Mounts (optional)
• New Polyester/Fiberglass cowl (optional)
 • New pre-bent flex tube (optional)

If anyone that has got an 21GT could measure the missing info on the above list and e-mail me that ( I would be happy. Those are:
• After-plane length (end of ski to end of sponson ride pads)
• Engine center to end of ski length
• Sponsons ride-pad AoA
• Ski AoA

JAE 21GT built by Mike Walker

JAE 21GT built by Adam Blevins /

Friday, October 7, 2016

285.393KMH = New R/C Boat World Record!

285.393KMH = New R/C Boat World Record!

(Google Translated text)

Jörg Mrkwitschka drove a new absolute world record for RC boats with his L8 Rigger in September 2016 the 2nd Munich SAW. The average speed for 2x100m was 285.393 km/h. This Rigger reaches a top speed of over 300 Km/h and is fired with a brushless motor of the company "Lehner Motoren Technik" (LMT). This is a 2-pole motor with high speed stability. The rest of the Riggers is all homemade (hull, propeller, ESC with lipo screwing the cells with each other and meant for regulators towards, hardware, etc.)

  • Boat: JAG's T Hydro 2015/2016, approximately 125 cm long, 55 cm wide, about 3.4 kg race ready
  • Motor: LMT 2260/5 HiAmp (with 8 mm shaft and rotor sleeve)
  • ESC: Own made output stage from 42 pcs IRFS7434-7P FETs with Schulze future 18.xx controller board
  • Batteries: 8S1P RoaringTop 5100 80C - preheated to about 45°C
  • Motor Coupling: Zander 8 mm / 2.5 mm
  • Propeller: JAG's C2044/3
  • Radio: Graupner X-8N with GR-16 dual-antenna receiver and two 30cm antennas
  • Receiver battery: 2S 335mAh SLS XTRON
  • Servo: MKS HV 747 for rowing and MKS HV 6100 for the airbrakes
  • Hardware: 2.5 mm spring steel shaft with JAG's Strut and JAG's rudder fitting (manufactured by MBP-RC), rudder blade from a knife
  • Datalogger: SM Model Unilog 2 (with homemade 1500A current sensor)

According to the data logger, the acceleration performance was at 298.6 km/h Pass at about 17kW (590A at 29.0V), ausbeschleunigt after about 4 sec at about 9.5kW (320A at 29.5V). The speed increased ausbeschleunigt up to 63.900 RPM to - jumping over their own wake of Hinpasses briefly at 70.000 RPM. The boat has dual brake flaps in the tail units which are activated together with the motor brake to come to a standstill until the end of the run.

Original German text:

Jörg Mrkwitschka ist mit seinem L8 Rigger im September 2016 auf dem 2. München SAW einen neuen absoluten Weltrekord für RC Boote gefahren. Die Durchschnittsgeschwindigkeit für die 2x 100m lag bei 285,393 Km/h. Dieser Rigger erreicht einem Topspeed von über 300 Km/h und wird mit einem Brushless Motor der Firma "Lehner Motoren Technik" ( LMT ) befeuert. Es handelt sich dabei um einen 2 Poler mit hoher Drehzahlfestigkeit. Der Rest des Riggers ist alles Eigenbau (Rumpf, Propeller, ESC, mit Lipo ist die Verschraubung der Zellen untereinander und zum Regler hin gemeint, Hardware usw.)

  • Boot: JAG's T Hydro 2015/2016, ca. 125cm lang, ca. 55cm breit, ca. 3.4kg fahrfertig 
  • Motor: LMT 2260/5 HiAmp (mit 8mm Welle und Rotorhülse)
  • Regler: eigene Leistungsendstufe aus 42 Stk. IRFS7434-7P FETs mit Schulze future 18.xx Controller-Platine
  • Akkkus: 8s1p RoaringTop 5100 80C, vorgewärmt auf ca. 45°C 
  • Kupplung: Zander 8mm/2.5mm
  • Propeller: JAG's C2044/3 
  • Fernsteuerung: Graupner X-8N mit GR-16 Doppelantennen-Empfänger und zwei 30cm Antennen 
  • Empfängerakkus: SLS XTRON 2s 335mAh
  • Servo: MKS HV 747 fürs Ruder und MKS HV 6100 für die Bremsklappen
  • Hardware: 2.5mm Federstahlwelle mit JAG's Strut und JAG's Ruderhalter (hergestellt durch MBP-RC), Ruder aus Messerblatt
  • Datalogger: SM Modellbau Unilog 2 (mit Eigenbau 1500A Stromsensor)

Laut Datenlogger lag die Beschleunigungsleistung beim 298,6km/h Pass bei ca. 17kW (590A bei 29.0V), ausbeschleunigt nach ca. 4s bei ca. 9.5kW (320A bei 29.5V). Die Drehzahl stieg ausbeschleunigt bis auf 63.900 U/min an - beim Sprung über die eigene Heckwelle des Hinpasses kurzzeitig auf 70.000 U/min. Das Boot hat doppelte Bremsklappen in den Leitwerken, die Zusammen mit der Motorbremse aktiviert werden, um bis zum Ende des Gewässer zum Stehen zu kommen.

Monday, September 5, 2016

Monday, August 29, 2016

Testing KEP's FE-4S "Proto" (P-Open)

  • Motor: TP 4040 (V2) 2900KV (Size: 39.55 x 77.5 mm)
  • ESC: Castle Hydra ICE 240A
  • Batteries: Dual Vapex 4S 3300 in parallel
  • Prop: 1445 3.4 (Andy Brown) 
  • Max RPM (end of straights): 35K (160-180A)
  • RPM in turns: 26-30K (90-130A)
  • Average Ripple: 0.93V
  • Peak Power: 2611W
  • End of run ESC temp: 86°C
Note, the boat in this film is a prototype I built for a friend before finalizing the drawings on the KEP's FE-4S & 4SL Freebie's. So this boat have a turn-fin that is a bit too small = it makes it a bit difficult to keep it in lane #1 with the speed I know is there - one needs to nurse it a bit too much in the turns. Then the ski is a bit too narrow also creating a bit to much load on the motor as it penetrates the drink too much. But note, BOOTH of those items are adressed in the KEP's FE-4S & FE-4SL Freebie drawings.

Freebie Links:

Tuesday, August 23, 2016

KEPs FE-4S Prototype

Mikael Sundgren's prototype KEP's FE-4S - here driven with "P-Limited" type of power.

Motor: TFL 36x60 with 2380KV
ESC: Hobbywing Seaking 160A
Batteries: 2x Vapex 4S 2200 mAh in Parallel
Prop: ABC H6

Note, the boat in the video is a prototype built more then two years ago. It's a test-rig that uses our old left-over T2-21 nitro sponsons and ski etc. So the fact that it runs too light on the front sponsons is fixed so to speak to the Freebie drawings that are published.

Monday, August 8, 2016

Inbjudan till SM4 i Oxelösund arrangerad av Sundsvalls Modellbåtsklubb

SM4 FSR-O, FSR-H & OTA i Oxelösund - Arrangerad av Sundsvalls MBK.

Sundsvalls Modellbåtsklubb inbjuder till SM deltävling Off-shore, Hydro och Utombordar Katamaraner helgen den 27-28 Augusti.

Plats: Kylvattendammen vid SSAB i Oxelösund
När: 27-28 Augusti
Klasser: FSR-O3.5, FSR-O7.5, FSR-O15, FSR-O26, FSR-O27, FSR-O35, Hydro FE-4S, FSR-H3.5, FSR-H7.5, FSR-H15 & FSR-27
Notera: Hydro & OTA körs klart på lördagen

R/C Båt Träffen i Oxelösund

Lördagen den 6:e Augusti arrangerade Oxelösunds MSK en R/C Båt träff i Kylvattendammen vid SSAB i Oxelösund. Vädret var bra och det dök upp över förväntan med besökare - totalt gissningsvis runt 30-40 pers (med och utan R/C Båtar) vilket vi är mycket nöjda med!

Tack för visat R/C Båt intresse och vi ses igen!