Friday, December 1, 2017

KEP's T3-21 V2 Freebie

Presenting the updated KEP's T3-21 V2 Freebie!

Main KEP's T3-21 V2 News (compared to the KEP's T3-21 "V1"):

  • New Turn-fin Mount!
  • New Turn-Fin!
  • New Sponsons to accommodate the new turn-fin mount!

Other Features (vs the earlier T2-21):
  • Flat sided sponsons. It really does not matter if the sponson top-view is elliptical, as the earlier T2, or flat sides as the new T3 - there are no performance benefits with elliptical so I changed it to flat sided instead. The new flat sided sponsons are much easier to build also!
  • Longer sponson ride-pads. Improves rough race water handling.
  • Improved side profile of the sponsons. Creates less lift and less water drag (from the spray behind the ride pads).
  • Lower AoA of the sponson ride pads. Improved handling in heat-racing conditions.
  • Longer after-plane. It makes it a tiny bit better in rough sea (other improved items makes more of a difference though).
  • The tub is leaning forward (lower in the front then in the back). Improved ride that overall creates a better stance of the complete boat on the water.
  • Slightly different nose shape of the tub.
  • Wider spacing on the sponson tubes (front & rear). Improved rigidity. As the tub now leans forward the tube centers are also adjusted so they are parallel to the water.
  • Channel 2 & 3 servos sit on either side of the flex and the receiver on the tub floor. Much easier to fit the mini servos.
  • Wider ski with improved AoA. Better in rough water and it's easier to maintain the overall boat AoA everywhere on the course.
  • Optional ski design with rakes on the running surface. Improved side stability in the corners and on the straights.

  • After plane length: 550 mm (21.65")
  • Overall length from transom to the tip of the sponsons: 765 mm (30.12")
  • Outside-Outside sponson spacing: 500 mm (19.69")
  • Tub length: 682 mm (26.85")
  • Tub inside width: 62 mm (2.44")
  • Tub outside width (with 4 mm thick sides): 70 mm (2.76")
  • Tub height: 47 mm (1.85")
  • Sponson width: 23 mm (.91")
  • Sponson ride pads (removable): 2 x 30 x 165 mm (.079" x 1.18" x 6.5")
  • Ride pads AoA: 3.4°
  • Ski width: 35-40 mm (1.38-1.57")
  • Ski AoA: 1.4°
  • RTR Weight (without fuel): around 1650 g (58.2 oz)

  • Futaba 4PLS radio
  • 2x Futaba S3172SV mini servos for channel 2 & 3
  • Futaba BLS571SV low profile steering servo
  • Vapex 1000 mAh 2S LiFe receiver battery
  • V.S. Third channel fuel metering base with O.S. needle
  • V.S. Speed 2101M motor
  • Note: the T3-21 works equally well with an in-line engine. It will run a tad bit lighter in the front though but that is NO problem.
  • Hipex 180° Exhaust Manifolder
  • Hipex MP1-21 Hydro Muffled Parabolic Pipe
  • Walter Barney @ Tanks 2U made SS tank T2/T3 (same size)
  • 8 x 10 mm pultruded carbon sponson tubes (475 mm long)
  • 10 x 12 mm aluminum tubes for the tub and sponsons
  • 2 mm carbon rod for securing the sponson tubes (much better then any other securing system we've tried by far).
  • Propeller: The T3-21 is not that critical regarding props I think and it depends on how you race and drive. For me personally I like an "easy" prop with not that much cup but with a a bit more COB pitch so you get good acceleration. I also like to be able to throttle at all times so that means I don't like props that are heavy on the engine and I don't use that short pipe lengths either. All props I've used are done by Mark Sholund and the ones Ive used the most are ABC 50x69 with 45.25 mm dia, 2.81 COB pitch and 3.33 cup. The ABC H6 with 45.9 dia, 2.9 COB pitch and 3.33 cup works fine also and they let you rev the engine quite easily.

Extra T3-21 V2 info:
  • The current KEP's T3 design is based on "3-point flat-plane technology" that means they run very light on the water. This type of outrigger design rely on a good balance between aerodynamics, hydrodynamics, center of weight, how much weight you have on each of the 3-points, rudder and the turn-fin. If you build the T3-21 V2 according to the plans and don't make any of your own design or geometric changes - then there is plenty of adjustment in the changeable/removable ride-pads, the changeable/removable ski and the strut height/angle.
  • Please make the V2 turn fin according to the plan and bend it to the specs. DON'T use any other turn fin shape and/or hook. (Make sure its sharpened properly also on the leading edge only.)
  • Don't place the turn fin too far forward. The boat will "dart" (wanting to continue to turn coming out of the corners) and it will be difficult to keep straight.
  • If your T3 is pulling to the right at speed on the straights: Double check that you have mounted the sponsons straight vs the tub - If not - correct that. If it still pulls to the right, check that the turn-fin is sharpened correctly and not dull on the leading edge. A turn fin that is not sharp will make the T3 to pull to the right even at slower speeds.
  • If you want some building tips etc - look to the right in the menus for the earlier T2-21 Build Series I did. The T2 and T3 is not exactly the same but you will get a feel for how to build one. If scratch building is not your thing though - go to Zipp Kits and buy a JAE 21G2 Kit instead and start learn to build on that. :)

KEP's T3-21 V2 Main Drawing - This pdf includes all the templates you need. The Freebie drawing is in A1 size (paper size: 841 x 594 mm). Make sure that it's printed 1:1 scale / 100% size. Click HERE for download (works best on a stationary normal PC/Mac).

KEP's T3-21 V2 Extras Drawing - This pdf includes some extra measurements. There is no real need for printing this one. The Freebie drawing is in A1 size (paper size: 841 x 594 mm). If you chose to print this one also make sure that it's printed 1:1 scale / 100% size. Click HERE for download (works best on a stationary normal PC/Mac).

KEPs T3-21 V2 Optional Ski with strakes. This extra optional Freebie drawing is A3 size (paper size: 297 x 420 mm). If you chose to print this one also make sure that it's printed 1:1 scale / 100% size. Click HERE for download (works best on a stationary normal PC/Mac).

If you have the earlier KEP's T3-21 "V1" - Click HERE for a download of an updated "T3-21 V2" fin that is adapted for the T3-21 "V1" turn-fin mount.

Wednesday, November 22, 2017

KEP's FE-4S V2 (P-Open) Freebie

Updated V2 version (2017-11-22)!

Freebie drawing of the new updated KEP's FE-4S V2 P-Open 4-cell LiPo Brushless in-runner Outrigger Electric Hydroplane.

  • No more toe-in on the turn-fin!
  • Updated V2 turn-fin mounting!
  • Updated V2 sponsons to accommodate the new turn-fin mount!
  • New V2 turn-fin!
Note, the KEP's FE-4S is a P-Open 4 cell LiPo outrigger. The boat can be fitted with brushless in-runner marine motors with physical dimensions of 36 or 40 mm diameter that are 65-74 mm long (note, it's physically possible to actually use motors up to 80 mm long but at those lengths it gets more difficult to make a nice cowling and the clearance towards the rear sponson tube is less "wrench friendly").

There is also an slightly smaller freebie version available for the P-Limited class they run in the US (with Aquacraft 3650-2030KV motors). That boat is called KEP's FE-4SL - click HERE for info and download of that. But if you just want to build one of these I recommend building this one as it also works with the smaller P-Limited Aquacraft motor.

Note, if you plan to go fast - let's say above 100-110 km/h - then you need LOT's of water cooling to stay below 90°C on the ESC. Use at least 4 mm tubes in the tub and matching large silicone tubes. Make an efficient and short cooling loop so the water will flow as much, and easy, as possible. It might be needed also to add a second water pick-up to cool the motor separately.

If you want some inspiration for building your own KEP's FE-4S rigger - Click Here (lot's of build pictures)

  • Made for 36x65-74 mm and 40x65-74 mm motors
  • Tub Length: 689 mm (27.126")
  • Total Length, from transom to sponson tips: 754 mm (29.69")
  • Tub Width: 84 mm (3.31")
  • Tub Height: 51 mm (2")
  • After Plane: 537 mm (21.14")
  • Sponson Length: 442 mm (17.4")  
  • Sponson Width: 23 mm (.09")
  • Sponson Ride-Pad Width: 30 mm (1.18")
  • Sponson AoA: 3.9°
  • Ski Width: 30 mm (1.18")
  • Ski AoA: 1.4°

Main drawing of the KEP's FE-4S V2 (1of2). Download it HERE. The PDF size is A1 = 841x594 mm. When you have had this printed out in 100% size you will cut the lower part away to make the actual templates etc.

Complementary drawing of the KEP's FE-4S V2 (2of2). Download it HERE. The PDF size is A1 = 841x594 mm. This one includes some extra info, extra measurements and some set-up tips etc.

If you already have built the original FE-4S (P-Open), or the FE-4SL for that matter, then you can update it with the New V2 Turn-Fin. Make sure you remove all toe-in on the turn-fin mount though!

Wednesday, November 15, 2017

iMBRA WC 2018 Update November 15th

iMBRA Update November 15th
Just to let you know, registration form to be sent to all international federation is nearly ready to go : we are just missing confirmation for the banquet.
In the meantime, shall we remember information posted on November 1st below. Regarding campsite near the lake, as many of you asked info, facilities will be like in Haarlem or Oudenaarde, from those who know those place! i.e 2 blocks of each (toilet/showers) at 2 different places.
Following our last visit to EGLETONS, here are the latest information we can provide.
  • IBIS: It would seem that the that manager has decide to block out half of his hotel to his regular guests, which means there might not be much availability. There is a chance that some of the reserved rooms might be released in February.
  • OTHER HOTELS: There are rooms still available, so please contact them directly.
The manager is kindly offering a 10% discount that is available on rooms that are booked up to the end of December.
The bookings from run from Saturday to Saturday and prices can be seen below per person.
  • Adult (16+): 415 Euro – with 10% Discount: 373 Euro
  • Young Person (12 to 15): 373 Euro – with 10% Discount: 335 Euro
  • Children (6 to 11): 332 Euro – with 10% Discount: 298 Euro
  • Children (3 to 5): 290 Euro – with 10% Discount: 261 Euro
  • Children (0 to 3): Free
The (Village Vacances le lac) fares includes:
  • A room of 2 single beds, bathroom, breakfast and dinner. Some of rooms can be “connected” (IE 4 people) or a 3:rd bed can be added for young children.
  • Supplement of 15 Euro per night if used as a single (room).
  • Please contact them at: to pre-book the room (required information; names, number of people, ages, and period of stay)
  • Payment is sent directly to VILLAGE VACANCES LE LAC, and is not part of iMBRA WC Registration. iMBRA cannot accept any responsibility for issues regarding accommodation, but we will do what we can to help if there are problems. Once the booking is officially opened we can advice you.

  • CAMPSITE across the lake: Please contact them directly
  • CAMPSITE around the lake: to be asked on IMBRA WC registration form.

See you all soon,
France iMBRA and the iMBRA Committee
Source & France iMBRA on Facebook

Thursday, October 26, 2017

iMBRA WC2018 Update

iMBRA World Championships 2018 - Update

October 26, 2017

Good Morning Racers,

Plans are well underway for the 2018 iMBRA World Championships in Egletons, France, and we just wanted to share with you some information on how it's all going.

The official invite and registration forms are nearly completed, and will be sent out as soon as we have finalised all organisation with Egletons’ City team. A Meeting is due at the end of October and we will update you as soon as possible. 

The organisation team are working with all the local hotels and campsites to make sure that there is something for everyone, There is a map of the venue that might help you to make your decision, and there is a list of hotels etc. 
For those who only wish to be in a hotel, the closest is IBIS and as far as we know this can be booked from today.
Opposite to the lake is the “Village vacances le Lac”. The Manager has asked that people do not make enquiries or bookings until January 2018. However, you already can have a look on web , but we will you all as soon as books are being taken.

There are also a number of Bed & Breakfast available in and around the town.

Keep an eye out on Facebook and the website for more information and news about the 2018 World Championships.

Best regards to you all.

France iMBRA Team

Dates Reminder for the World Championships will be as follows:
Hydro & Offshore: 
Monday July 30th- Registration
Monday July 30th to Friday, August 3rd- Training and races
Saturday August 4th- Finals
Sunday August 5th (evening)- iMBRA Open Meeting 

Monday August 6th- Registration only
Monday August 6th to Friday August 10th- Training and races
Saturday August 11th (Morning)- Finals

Thursday, October 19, 2017

H & O Sektionsmöte samt R/C Båt Träff 2017!

Sektionsmöte för FSR-O & H samt R/C Båt Träff

  • Datum: Lördagen den 25 November 2017
  • Plats: Minicarshuset Enköping
  • Samling: 09.30
  • Start: 10.00
  • Lunch: Om ni önskar lunch så kostar den 140:- i kontanter eller Swish
  • Anmälan: Obligatorisk och bindande vad gäller lunchen. Anmäl er senast Söndagen den 19:e November till – var god notera vid anmälan hur många ni kommer och hur många lunch ni önskar.
Dagordning (provisorisk):
  • 09.30-10.00: Ankomst & fika/frukost
  • 10.00: Sektionsmöte FSR-O & FSR-H (se länkad dagordning)
  • 13.00: Lunch
  • 14.00: Fortsättning av mötet och efterföljande R/C Båt snack tills vi tröttnar...

Monday, September 25, 2017

New 8S SAW World Record - 314KMH!

Jörg Mrkwitschka beat his own 8S straightaway world record at the recent SAW event at the Olympic canoe pond in Munich with an amazing 30 kmh!

314.426 kmh (195.38 mph) 2-way average speed

His old record set in 2016:
285.393 kmh (177.335 mph)

Thursday, September 14, 2017

Fast Japanese SAW riggers

These videos are from what I think is a recent SAW event in Japan:
• .21 Rigger: 191 kmh (118 mph)
• .46 Rigger: 203 kmh (126 mph)
• .91 Rigger: 213 kmh (132 mph)

(Im not sure if these are the results from the event or if they are the national records)

Fast JAE21

Ian Inverarity's old JAE 21 rigger with a NR21 DD engine. It screams!

Tuesday, August 15, 2017

80's hydro pics

Old hydro pic's from the 80's
Photos by André Holster Westerberg

You can find them all (and more) at THIS LINK in bigger size also.

André Holster Westerberg's own designs Scorpio .46

I think this is Mikael "Sunken" Sundgren's Daffy 21

I still have one of these Octura T-shirts

Think this is from an early world championships with eager racers trying to figure out the secret behind Kenneth Lundqvist's riggers

The hydro legend - Kenneth Lundquist

 Anders Ydergård's Daffy 45

 Anders Ydergård with assistance from Fred Brihagen

Bengt Loryd's Dart 45

Bengt Loryd

Laydown engine in this Crapshooter

Christer Gustafsson

Ellert Ohlzon & Dart 45

Roland Jansson & Wing Ding

Jörgen Andersson @ Hacksjön

Jörgen Andersson @ Hacksjön

Jörgen Andersson's fleet of riggers @ Hacksjön. Two Crapshooters and his "Svarten" SAW boat

Jörgen Andersson & Crapshooter

I think this is Kalle Schenning's Daffy 21 SAW rigger

I think this is Kalle Schenning's Daffy 21 SAW rigger

I think this is Kalle Schenning's Daffy 21 SAW rigger

 Kenneth and other rigger dudes @ Hacksjön

Bengt Loryd & Dart 45

 Bengt Loryd & Dart 45

Anders Ydergård & Daffy 45

 Fred Brighagen

 Benny Lindholm


Crapshooter action

Jörgen Andersson & Crapshooter 21

 Jörgen Andersson & Crapshooter 45

 Jörgen Andersson & Crapshooter 21

Jörgen Andersson fleet

Tasteful graphics

I do believe this is Mr Sunken himself (Mikael Sundgren) with his Daffy 21

André Holster Westerberg's Scorpion 46 drawings

Jörgen Andersson's Crapshooter 21 from Hacksjön (it's most likely me also in the background to the left)

Jörgen Andersson and Anders Ydergård (Daffy designer) @ Hacksjön

Jörgen Andersson launching Anders Ydergård's Daffy 21 @ Hacksjön