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  •   Boats Sailboats Discussion Radio Controlled Foiling America's Cup Catamaran: AC 50RC

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Beam: max 3.75'=45"/115cm( )
Tentative rules based on my D4Z:
--movable ballast system legal and may exceed maximum beam-no restrictions,
-- foils may extend outside the maximum beam.
--rudders may be transom hung
--SA up to 1900sq"
--no channel restrictions
--no foil type restrictions
--no rig restrictions
===================
Directly scaled Model length is 1/10th fullsize, SA is 1/100 fullsize, weight is 1/1000th fullsize, RM is1/10000th fullsize.
NOTE: sailarea, weight and RM of the model cannot be equal to the directly scaled values from fullsize.
===================
As far as I'm concerned that is the Basic set of rules until more boats are built and an excellent foiling system or systems are developed and proven.
-No boat built under these basic rules may later be disqualified or modified in any way by later rule changes.
My primary direction now will be to complete and foil my boat with three different foiling systems as well as experiment with the Trapeze Power Ballast System. I would imagine Jim in Australia will be doing similar development .
The idea and absolute requirement for a successful RC Americas Cup foiling cat is:
1-that it foils in light air,
2-that it foils upwind,
3-that it routinely gybes on foils,
4-that it is capable of sailing a triangular or windward/leeward course faster than any comparable size monohull.
These will be tough requirements to meet but are essential for future growth of the class.
The D4Z below is one of the first two AC 4.8RC cats and is nearly complete and will be under constant development. Jim in Australia's prototype is under development but is sailing and has foiled for short bursts.
====






.
(2 min 50 sec)
(1 min 32 sec)
(1 min 44 sec)














.
on "Foiling in the USA".


work for you.
Generally foils fall in one of two main categories-fully submerged which encompasses wand controlled foils as well as UptiP foils(mostly) and Surface piercing foils which start out fully submerged but rise out of the water the faster they go until they reach an equilibrium due to speed. Both fully submerged and surface piercing foils use a trailing T-foil(or L foil) on the rudder or rudders that automatically creates pitch stability. I'm thinking that a surface piercing T foil like the ones below work for you because they have automatic altitude control due to speed.
But any system like this won't be immune to inadvertent body weight movement though they should be a lot more stable in pitch than a current fully submerged kite foil.They should be extremely stable in heave(excellent altitude control). I'll be testing them in a few weeks.
You can PM or e-mail me anytime.















work for you.
...
.They should be extremely stable in heave(excellent altitude control). I'll be testing them in a few weeks.
You can PM or e-mail me anytime.

boatdesign.net Fire Arrow thread:

PS it will be inititially tested with a "Trapeze Power Ballast System" for extra righting moment.
(1 min 10 sec)
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RC 1/5 Scale AC50 Foiling Catamaran

Discussion in ' Multihulls ' started by WerpKerp , Apr 29, 2019 .

WerpKerp

WerpKerp Junior Member

So I bought a RC RG65, an BG Electronica, and have been using it to learn RC sailing. I've also caught the RC Foiling bug, though. I watched a few SailGP races, (Absolutely brilliant, by the way), and was thinking, would it be possible to build a giant-scale, 10ft long RC AC50 wingsail catamaran?  

BlueBell

BlueBell . . . _ _ _ . . . _ _ _

YES!  

Doug Lord

Doug Lord Flight Ready

Sure, this guy is still working on his version: Ac-86 build - RC Groups https://www.rcgroups.com/forums/showthread.php?1887900-Ac-86-build However, to do it right(so that it works) you'll have a lot of studying to do. Read the above thread all the way thru. Be sure to give A LOT of consideration to the practical aspects of such a large model-transport, stowage, rescue from capsize, depth of water to fly in, sailing location not polluted with weeds, COST, radio channels, servo systems capable of retracting and deploying a loaded foil quickly(1-1.5 seconds), foil system(altitude control-recommend wand controlled T-foils or UptiP foils instead of a scale system for simplicity of operation), wing design, battery weight and type( recommend litium iron(LiFE), battery chargers, sailmaker for jib, hull tooling,etc. I may be able to answer a few questions not covered in the thread. This will be a HUGE job both in time, effort, cost and study and PATIENCE. Good Luck and be sure to learn and have fun! Look around on RC Groups Sailboats forum(above) and the German RC Multihulls forum: Multihulls http://www.rc-network.de/forum/forumdisplay.php/166-Mini-40 ====================== Altitude Control: See posts 14 and 15 in the RC Groups thread--I wrote both of them and they give you an overview of using wand controlled foils which are VASTLY simpler than trying to manually(by radio) control the angle of incidence of the main foils which would be the exact scale solution. Using UptiP foils would require very little control input if they are well designed BUT they would require(probably) lifting the windward foil as you tack or gybe.  
The reason I am interested in constructing such a large model was, first and foremost, because it would look, as the kids say, hella dope, and because many of the videos of Mini40s and smaller RC foilers I watched showed that they were rarely able to maintain a stable flight, often being knocked down by waves. I thought maybe a larger vessel, with more mass and inertia, could maintain a smoother flight?  
Did you look at Ian Holts boats? They seem to be pretty good and are the only RC foilers now being produced. Foiling radio control trimarans https://www.boatdesign.net/threads/foiling-radio-control-trimarans.55840/ ------------- You're pretty much right about size but it depends on where you want to sail and other factors including the type of foil system. The production foilers like Ians are mostly surface piercing foilers with altitude controlled by speed. That means the foils don't actively add to RM. Ian was working on a foiler with a wand based altitude system-if that's perfected it might be a good choice if it works well because the foils automatically increase RM as necessary. The 19 year old F3 trimaran foiler used wands but it was patterned after the fullsize RAVE so it had a wave height limit where it would bottom out. Worked well in smooth ponds but had trouble in the intercoastal. The foil height wasn't adjustable but could be on a "modern" version. Wand based foilers using the Bradfield system are best if they are designed for the place you want to sail. The bigger, the more versatile it will be. These wand based foilers are the only type of foiler* with automatic altitude control that uses the foils to generate most of the RM-a good thing for a model foiler. * With the exception of the Hobie Trifoiler type designed by Greg Ketterman that uses dual independent "feelers" out in front of the boat that act as surface sensors. If you want a cat then I'd suggest doing one with a wand based altitude control system. Decide on size after you've done a lot more studying and evaluating the tradeoffs. The F3 foiling tri was 56" LOA and 72" wide. The Fire Arrow foil system may be the best system for rough water especially if you look at the large fullsize tri's that use the system but neither of these tri's is an "Americas Cup" boat or an F50 type. But you could do an F50 type cat using a wand based foil system instead of a scale manual/electronic system. A tri makes a better RC model multihull, in my opinion.  
Also, where could I find good AC50 drawings? I've only found ETNZ AC72 drawings here; Chevalier Taglang: Scoop: AC72 Drawings unveiled http://chevaliertaglang.blogspot.com/2013/06/scoop-ac72-drawings-unveiled.html  
WK, if you want a spectacular model that will impress to the max, why don't you consider a scale or semicale model of the 100' Gitana 17 or one of the other ULTIM trimarans: Gitana 17-100' Trimaran Foiler-Launch 7/17/17 https://www.boatdesign.net/threads/gitana-17-100-trimaran-foiler-launch-7-17-17.58231/page-10 You get a spectacular model with a super foil system and proven capability. Gitana 17: Banque Populaire: MACIF:  
WK, did you watch the F50's today on SailGP's youtube channel?  
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Doug Lord said: ↑ WK, did you watch the F50's today on SailGP's youtube channel? Click to expand...

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Performance Sailing – Sail GP News: Racing on the Edge – T-Foil proves to be the winning design

Performance Sailing – Sail GP News: Racing on the Edge – T-Foil proves to be the winning design

Regatta and foiling News: Long distance Race – Duc d’Albe 2023 – Club Multicoques Hyères – sailing Race @iFLY Razzor Pro

Regatta and foiling News: Long distance Race – Duc d’Albe 2023 – Club Multicoques Hyères – sailing Race @iFLY Razzor Pro

iFLY Main Foil Differential Technology – MDT Foil Control – high Performance sailing

iFLY Main Foil Differential Technology – MDT Foil Control – high Performance sailing

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FOILING – REGATTA – EVENTS

Long distance Race – Duc d’Albe 2021 – Club Multicoques Hyères – sailing Race @iFLY Razzor Pro

Long distance Race – Duc d’Albe 2021 – Club Multicoques Hyères – sailing Race @iFLY Razzor Pro

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COMMENTS

  1. RC Foil Sailing

    About RC Foil Sailing. Building on from 45 years of sailing a multitude of yachts from racing dinghies to keel boats I started sailing radio yachts in 2002 initially buying a Seawind plastic kit but soon progressing to the 1.0m and Marblehead class winning 3 National titles. I still enjoy sailing my Marblehead 15 years later.

  2. Home page

    Home page - RC Foil Sailing. Home /Home page. Home page. Filter. RTF DragonFoiler DF 95 Foiling Trimaran. $1,795.00. DragonFoiler DF 95 Foiling Trimaran Conversion Kit (No Hull) $1,195.00.

  3. Radio Controlled Foiling America's Cup Catamaran: AC 50RC

    The FINAL rule released in June 2015, set the length of the full size boat at 15m or 49.2'. instead of 48. My proposal (based on an earlier suggestion by John Xman) is to adopt the same change for the model: Length 1.5 m or 4.92 ' (59"). The AC guys are calling their boat the AC 50-in my opinion we should call this boat the "AC 50RC".

  4. Dragon Foiler

    Dragon Sailing North America is proud to offer our skippers the latest in cutting edge RC Sailing technology with the affordable & Revolutionary DragonFoiler, RC Foiling Trimaran brought to you from the mind of design guru Paul Goddard from New Zealand! Based on the center hull section of the DragonFlite 95, the DRAGONFOILER is a battle-tested ...

  5. RC 1/5 Scale AC50 Foiling Catamaran

    The Fire Arrow foil system may be the best system for rough water especially if you look at the large fullsize tri's that use the system but neither of these tri's is an "Americas Cup" boat or an F50 type. But you could do an F50 type cat using a wand based foil system instead of a scale manual/electronic system.

  6. Formula Foil

    the ifly racing version enables even higher performance, to sail in extremely tough conditions and allows sailing with xxl rigs. the main difference between the ifly15 one design and the ifly razzor pro is a bigger racing rig, special foils and the main foil differential (mdt), which is manually trimmed by the sailor.the mdt is working hand in hand with the flysafe® dynamic foil control system.

  7. FireDragon

    The FireDragon is a slim hulled Trimaran designed by Roland and build by RCSails. The boat has slim floats from our Nightmare X and a new only 11.5 cm wide slim main hull. With the T-foil rudder the FireDragon is fast and stable. The boat can be equipped with V-foils. Have a look at the pictures and the video clips of the prototype.

  8. Masters of the RC: Foiling Mini 40s Trimarans (II)

    Some links to videos are here. Most of the boats are from the Mini40 class, which is a 1/10th model of the 40ft class raced in Europe in the late 1980s. So the boats can be 1.22m long and 1.22m wide with a max sail area of 0.9sq metres. - Wing tips are on #46 tri.

  9. RG 65 with improved foil setup (RC sailing and foiling)

    RG 65 boat Orka MKII with foil and C-Rig.Improved foil setup. Fully flying phases on the foil over 30-50 meters. Under perfect conditions and timing also foi...

  10. Mini40 Class Multihulls

    The Mini40 in the Untied States called the F48 Class is the most popular model multihull sailboat class. The class is a experimental class ,the boats can have a maximum length and width of 122cm or 48 inch and a maximum sail surface of 0.9 sqm. The class is raced in Europe, the United States, Australia and New Zealand. In the recent time first Mini40 Class hydrofoils have envolved.