bearracing

This is my home made tunnel. The outboard foot is also home made.

bearracing

The slot at the back of the cowl is for picking the boat up. It comes in handy when you lanch yourself.Here are 2 more views. Will know how fast it is April 1st . We will be holding time trials onthe1-2-3 .

jpelezo

jay I am on my third season with carbon rods, have not broken one yet. even had one run up on bank and went upside down, still did not break. they work great.jim pelezoOdessa,tx

jay384

Jim could you post some photos or send some to me of your steeriong rods so i can see what your doing because i have split another set today

F1TUNNEL

Jay, are you using threaded rod the full length of your rods? The carbon tube is more of a stiffener than anything else,
cheers,
dion

jay384

was originally using carbon rods with the 4-40 thread rod glued in the end. but the rods kept shattering. So i decided to try the 4-40 push rods.But their not any better. So tried another set of carbon rod and brok them aswell. the next thing im going to try is cables like the full sze boat.

The other issue im having is massive torque steer problems

Hesco Racing

Problem with carbon rods is that the carbon is thin strands all running in a length wise way. There is no binding around the tube so if you glue something inside any hard force would burst the carbon open. What we used to do is machine a brass sleeve that fits at least 30mm over the carbon tube threaded at the end to insert a stud which then threads into the ball link. Some guys also used 4mm spring steel rod (mostly used in spar reinforcing in rc planes) threaded at the end to M4 which then threads into the ball links.

Cobus

F1TUNNEL

Hi Cobus!!
Jay, here is what I use. The stainless all thread comes from Thomas Warburton. If you use brass or al on your rods a pipe cutter leaves a nice lip. I now use the ggood shrink tube with glue in it on the ends as it is easy I epoxy the full length of threaded rod into the carbon- no failures yet

Outboard Jay

Hello Jay, from another Jay,

I have used Sullivan stainless steel cables for years ...from 3.5 OB's to gas OB's...soldered ball links to cable BUT feeling that
I needed more room at the transom, I cut out from aluminum sheeting steering arms that are mounted on the engine lug bolts so that the cable mounts to the steering arms OUTSIDE the hull on wooden hulls..(fiber glass full size bodies may offer some exit problems.) The cable is flexible so it is simple to exit out the side of the hull fastening to the steering arm. The only negative is that the aluminum arms can bend easily if you are hit by another boat! ...perhaps steel arms would be the way to go...I've never used them because I have no way to fashion them...Oh, and an added plus to me is that the cable w/ steering arms look more like their full sized brothers. Good luck with your rigging...there are other methods...someone else may respond also.

Jay

jpelezo

jay here is picture of my cable end. this one is 3/16 and 7/32 brass tube cut about 1' long and epoxied on ends

bearracing

Did not get a speed on my boat At the records trials. What is the speed of a good gas tunnel? A good guess on my boat was 45mph.

BigByrd47119

Cross-threaded the prop shaft piece that goes into the leg on the lawless...put it in and out a hundred times and never an issue...guess Im in the market for a new one...damn thats an expensive mistake!

F1TUNNEL

BUGGER!!

Tiekie

We do between 90-100 km/h easily...
Regards

YPC

Hi All......great to see you are all still enjoying 'Flying' your hulls....and continuing the development.

I am keeping an ear and eye out from the side lines for now.

As for the Carbon steering Rods - The big F1's need weight - so - I just use a full length 4mm S/S threaded rod - pass it all the way through the Carbon tube with nuts on either end. It 'never' breaks.

BigByrd - get a hold of the left hand thread tap and clean it out - I have restored quite a number by simply doing that.


If you would like to see what is keeping me otherwise occupied , take a look at my YouTube page..... http://www.youtube.com/user/formulaish ......... just loving it.

RCU Forum http://www.rcuniverse.com/forum/m_11...m.htm#11411721

web site http://bro********.com/

"If its touching the water - You are going to slow"............have a Gas !

Regards
Dominic
YPC

F1TUNNEL

Hi Dom!! Great to hear from you!! That 4mm rod is the way to go for sure-my carbon rods will wear out from rubbing on my cowl brace before they break. I am hoping now my rod ends are my weak link but it may be the servo gears as they are plastic.
did you ever get my email as I did not hear from Lisa-Marie?
got a couple AB mod props on the way to try out which should bring some more speed.
did some great acrobatics the other day- around the back marker and caught a gust of wind and did a 360 spin with a back flip and kept going like it was meant to happen lol, wish it was on film- would have made a good go pro clip.
happy boating,
Dion.

YPC

Hi Dion......I will follow up with Lisa-Marie......I do still have the unit put aside for you.

Those 360 flips are amazing......I to have done a few by fluke......'no damage' is always a good day !

Remember ! when testing the props - its not how fast the GPS indicates you are going.......its how fast the stop watch indicates you are going 'around the course'...good handling is good speed.

It would be great to see some footage.......

Regards
Dominic
YPC

F1TUNNEL

Yeah I am going to have to buy a vid cam as the iPhone just doesn't cut it.

tony480

Hi need some help please, where can I get replacement drive cable for G Morty outboard leg , please .

jay384

From Greg himself he works at a company called sure castings here in Australia should be able to find it on the web. its located in a suburb called mortdale in new south wales Australia. Hope this helps if not email me and ill see what I can find out.

F1TUNNEL

I think Ian at Oz RC stocks/can get G-Morty cables.

F1TUNNEL

Anyone have a hot pipe for ob not being used- would like to try one out

Hesco Racing

Why try? buy it it works. Trust me have 3 running in our club and they run hard and strong.

Cobus

F1TUNNEL

Hi there Cobus!!! Hope you have been well I do want to buy one, just thought I would put it out there to see if there was any used ones around first. If I go new I will get Don M to weld me up one. Got any pics of the boats running at your club- be great to add some fresh color to the thread
cheers,
Dion.

jay384

Dion my Alpha runs one of dons pipes I will vouch for it. on a saw engine with a modified 1048 carb and a 3 inch flex centre. on an MHZ leg. send me your email and ill send you some photos.....better still here they are