Ossi F.1 Tunnel 1st test

[winston]

Hi, 1st test of my new Ossi F.1 Tunnel, this morning at 7.00AM at Melieha Bay Malta, The sea was lovely so I prepared every thing before my Mate arrives, I looked around because there were some people asleep on the beach after there late B.B.Q night at the bay, any way. I am pleased so far with this setup, next step is to increase Engine power.

Check this out.-------------- <a href="http://www.youtube.com/watch?v=IP4KqZbhOg4" target="_blank">http://www.youtube.com/watch?v=IP4KqZbhOg4</a>

~~~`Winston`~~~

 

[Gator 340]

Hi, 1st test of my new Ossi F.1 Tunnel, this morning at 7.00AM at Melieha Bay Malta, The sea was lovely so I prepared every thing before my Mate arrives, I looked around because there were some people asleep on the beach after there late B.B.Q night at the bay, any way. I am pleased so far with this setup, next step is to increase Engine power.Check this out.-------------- <a href="http://www.youtube.com/watch?v=IP4KqZbhOg4" target="_blank">http://www.youtube.com/watch?v=IP4KqZbhOg4</a>

~~~`Winston`~~~

Winston that thing looks pretty good out there

 

[winston]

Hi, 1st test of my new Ossi F.1 Tunnel, this morning at 7.00AM at Melieha Bay Malta, The sea was lovely so I prepared every thing before my Mate arrives, I looked around because there were some people asleep on the beach after there late B.B.Q night at the bay, any way. I am pleased so far with this setup, next step is to increase Engine power.Check this out.-------------- <a href="http://www.youtube.com/watch?v=IP4KqZbhOg4" target="_blank">http://www.youtube.com/watch?v=IP4KqZbhOg4</a>

~~~`Winston`~~~

Winston that thing looks pretty good out there

Hey Buddy, Thanks I am glad that your Tunnel went great With that thing, and thanks a lot for your help.

~~~`Winston`~~~

 

[racejunkie538]

Hey Winston

That looks cool, running good to but sounds like I mis lots of RPM.

Like to show you some pics of my Ossi running this weekend to, I hope you to show a longer vid soon.

Speed at this moment 30mph for a 23lb tunnel.

http://i11.photobucket.com/albums/a184/rac.../Finalcheck.jpg

http://i11.photobucket.com/albums/a184/rac...8/Therewego.jpg

http://i11.photobucket.com/albums/a184/rac...38/Letsrock.jpg

http://s11.photobucket.com/albums/a184/rac...nt=MOV09962.flv

Gr Marc

 

[winston]

Hey Marc, Thanks a lot for your reply, Your boat look cool, Marc can you please measure your tunnel and tell me the length of your C.G.

Please find attached photo to see what I mien. Thanks Buddy.

~~~`Winston`~~~

 

[topfuel443]

Winston, since I have never run one of these boats, I have no idea where the balance point should be. I could guess and say somewhere around 30% from the rear of the boat, but the guys who actually race them would know for sure.

Sorry! ~James

 

[winston]

Winston, since I have never run one of these boats, I have no idea where the balance point should be. I could guess and say somewhere around 30% from the rear of the boat, but the guys who actually race them would know for sure.
Sorry! ~James

Thanks James, Am glad to hear from you. But I don`t know 30% if it is from the sponson or from the transom?

~~~`Winston`~~~

 

[topfuel443]

The number refers to the back edge of the sponson, not the transom.

~James

 

[winston]

The number refers to the back edge of the sponson, not the transom.
~James

Thanks Buddy, ok I was on the right track

~~~`Winston`~~~

 

[FurnalFlyer]

Best way to find the bance point of the hull is to take a small piece of dowl and put in across the bottom and moving it forward or back till it balances on the dowl.

Old race boat trick that I picked up from my father.

 

[topfuel443]

Im pretty sure he knows how to find the current balance point, he is asking what would the ideal balance point be.

 

[racejunkie538]

Winston

James is right, you messure fromt he back edge of the sponson, not the transom.

The CG of my Ossi is at 32% with 500 grams (17.6oz) weight in front. It messures 15.62 inch from the back edge of the sponsons.

Hope this will help you, its difficult to say my CG is at the good point right now, but I think I'm getting close.

Today some nice VooDoo props arrived, so I will do some more testing. Will let you know.

Gr Marc

 

[FurnalFlyer]

Im pretty sure he knows how to find the current balance point, he is asking what would the ideal balance point be.

Sorry just a newbie here..

Trying to take everything in for when I start racing..

 

[winston]

Im pretty sure he knows how to find the current balance point, he is asking what would the ideal balance point be.

Sorry just a newbie here..

Trying to take everything in for when I start racing..

Don`t worry buddy at least you tried to help, James was right its not how to find where the current CG is, but where it should be.

~~~`Winston`~~~

 

[winston]

Winston
James is right, you messure fromt he back edge of the sponson, not the transom.

The CG of my Ossi is at 32% with 500 grams (17.6oz) weight in front. It messures 15.62 inch from the back edge of the sponsons.

Hope this will help you, its difficult to say my CG is at the good point right now, but I think I'm getting close.

Today some nice VooDoo props arrived, so I will do some more testing. Will let you know.

Gr Marc

Hi Marc, So there must be something wrong, my CG is 13`` from the sponson with 1 litter water IV bag in the nose of the Hull, total weight is 9.7 kg = 21.3 lbs

Don't you think so???????? <_< :huh:

~~~`Winston`~~~

 

[racejunkie538]

Winston
James is right, you messure fromt he back edge of the sponson, not the transom.

The CG of my Ossi is at 32% with 500 grams (17.6oz) weight in front. It messures 15.62 inch from the back edge of the sponsons.

Hope this will help you, its difficult to say my CG is at the good point right now, but I think I'm getting close.

Today some nice VooDoo props arrived, so I will do some more testing. Will let you know.

Gr Marc

Hi Marc, So there must be something wrong, my CG is 13`` from the sponson with 1 litter water IV bag in the nose of the Hull, total weight is 9.7 kg = 21.3 lbs

Don't you think so???????? <_< :huh:

~~~`Winston`~~~

Winston

So your CG at this moment is around 28% from the back of the sponsons. What I believe from 1:1 F1 tunnel is the CG from 33% and further forward from back end. Take a look at the picture where the boat is hanging in the crane and you will see where the halters are attachged.

Don't know the complete exact weight of my engine, but I put my radiobox as far as possible in front of the nose.

I know Arian Hendriks with his Ossi was also running with 1000gr of weight in in the nose of the hull, what I ment is that it's not that wrong.

How is your boat running, is it near flip over at high speed. What you can try is to put some more weight in font so you will be at 33% CG, but what comes up must come down to. So if you hit a wave and it will lift the boat up a bit, by the next wave it comes down quicker and the boat will go like a submarine. (that is why 1:1 tunnels will not run with to much swell)

What I know from scale F1 tunnel racing is that the best setup for CG is from 30% / 33% like James sayed.

http://i11.photobucket.com/albums/a184/rac...38/DSC08116.jpg

http://i11.photobucket.com/albums/a184/rac...38/DSC08124.jpg

http://i11.photobucket.com/albums/a184/rac...38/DSC06956.jpg

Gr Marc

 

[winston]

Winston
James is right, you messure fromt he back edge of the sponson, not the transom.

The CG of my Ossi is at 32% with 500 grams (17.6oz) weight in front. It messures 15.62 inch from the back edge of the sponsons.

Hope this will help you, its difficult to say my CG is at the good point right now, but I think I'm getting close.

Today some nice VooDoo props arrived, so I will do some more testing. Will let you know.

Gr Marc

Hi Marc, So there must be something wrong, my CG is 13`` from the sponson with 1 litter water IV bag in the nose of the Hull, total weight is 9.7 kg = 21.3 lbs

Don't you think so???????? <_< :huh:

~~~`Winston`~~~

Winston

So your CG at this moment is around 28% from the back of the sponsons. What I believe from 1:1 F1 tunnel is the CG from 33% and further forward from back end. Take a look at the picture where the boat is hanging in the crane and you will see where the halters are attachged.

Don't know the complete exact weight of my engine, but I put my radiobox as far as possible in front of the nose.

I know Arian Hendriks with his Ossi was also running with 1000gr of weight in in the nose of the hull, what I ment is that it's not that wrong.

How is your boat running, is it near flip over at high speed. What you can try is to put some more weight in font so you will be at 33% CG, but what comes up must come down to. So if you hit a wave and it will lift the boat up a bit, by the next wave it comes down quicker and the boat will go like a submarine. (that is why 1:1 tunnels will not run with to much swell)

What I know from scale F1 tunnel racing is that the best setup for CG is from 30% / 33% like James sayed.

http://i11.photobucket.com/albums/a184/rac...38/DSC08116.jpg

http://i11.photobucket.com/albums/a184/rac...38/DSC08124.jpg

http://i11.photobucket.com/albums/a184/rac...38/DSC06956.jpg

Gr Marc

Hi Marc, Thanks a lot for your help, so in another word I must have the outboard a little heavy, because I made every thing by the rule, what looks strange to me is that the hull weight 8.3 kg complete but with out the one litter water IV bag in the nose of the Tunnel.

Thank you for your time Marc.

~~~`Winston`~~~

 

[racejunkie538]

Winston
James is right, you messure fromt he back edge of the sponson, not the transom.

The CG of my Ossi is at 32% with 500 grams (17.6oz) weight in front. It messures 15.62 inch from the back edge of the sponsons.

Hope this will help you, its difficult to say my CG is at the good point right now, but I think I'm getting close.

Today some nice VooDoo props arrived, so I will do some more testing. Will let you know.

Gr Marc

Hi Marc, So there must be something wrong, my CG is 13`` from the sponson with 1 litter water IV bag in the nose of the Hull, total weight is 9.7 kg = 21.3 lbs

Don't you think so???????? <_< :huh:

~~~`Winston`~~~

Winston

So your CG at this moment is around 28% from the back of the sponsons. What I believe from 1:1 F1 tunnel is the CG from 33% and further forward from back end. Take a look at the picture where the boat is hanging in the crane and you will see where the halters are attachged.

Don't know the complete exact weight of my engine, but I put my radiobox as far as possible in front of the nose.

I know Arian Hendriks with his Ossi was also running with 1000gr of weight in in the nose of the hull, what I ment is that it's not that wrong.

How is your boat running, is it near flip over at high speed. What you can try is to put some more weight in font so you will be at 33% CG, but what comes up must come down to. So if you hit a wave and it will lift the boat up a bit, by the next wave it comes down quicker and the boat will go like a submarine. (that is why 1:1 tunnels will not run with to much swell)

What I know from scale F1 tunnel racing is that the best setup for CG is from 30% / 33% like James sayed.

<a href="http://i11.photobucket.com/albums/a184/rac...38/DSC08116.jpg" target="_blank">http://i11.photobucket.com/albums/a184/rac...38/DSC08116.jpg</a>

<a href="http://i11.photobucket.com/albums/a184/rac...38/DSC08124.jpg" target="_blank">http://i11.photobucket.com/albums/a184/rac...38/DSC08124.jpg</a>

<a href="http://i11.photobucket.com/albums/a184/rac...38/DSC06956.jpg" target="_blank">http://i11.photobucket.com/albums/a184/rac...38/DSC06956.jpg</a>

Gr Marc

Hi Marc, Thanks a lot for your help, so in another word I must have the outboard a little heavy, because I made every thing by the rule, what looks strange to me is that the hull weight 8.3 kg complete but with out the one litter water IV bag in the nose of the Tunnel.

Thank you for your time Marc.

~~~`Winston`~~~

Your picture makes clear that your radiobox is in a good position.

The basic point: make the CG of your tunnel between 30 and 33% from the back end of the sponsons and after that you must test props and engine setup. (engine hight & trim)

I have run my Ossi with a prather 270 with a speed of 54 mph with stock Zenoah 260, (the first 30mph in my early message was not correct) have to do some more testing with 3 blade props.

Gr Marc

 

[winston]

Winston
James is right, you messure fromt he back edge of the sponson, not the transom.

The CG of my Ossi is at 32% with 500 grams (17.6oz) weight in front. It messures 15.62 inch from the back edge of the sponsons.

Hope this will help you, its difficult to say my CG is at the good point right now, but I think I'm getting close.

Today some nice VooDoo props arrived, so I will do some more testing. Will let you know.

Gr Marc

Hi Marc, So there must be something wrong, my CG is 13`` from the sponson with 1 litter water IV bag in the nose of the Hull, total weight is 9.7 kg = 21.3 lbs

Don't you think so???????? <_< :huh:

~~~`Winston`~~~

Winston

So your CG at this moment is around 28% from the back of the sponsons. What I believe from 1:1 F1 tunnel is the CG from 33% and further forward from back end. Take a look at the picture where the boat is hanging in the crane and you will see where the halters are attachged.

Don't know the complete exact weight of my engine, but I put my radiobox as far as possible in front of the nose.

I know Arian Hendriks with his Ossi was also running with 1000gr of weight in in the nose of the hull, what I ment is that it's not that wrong.

How is your boat running, is it near flip over at high speed. What you can try is to put some more weight in font so you will be at 33% CG, but what comes up must come down to. So if you hit a wave and it will lift the boat up a bit, by the next wave it comes down quicker and the boat will go like a submarine. (that is why 1:1 tunnels will not run with to much swell)

What I know from scale F1 tunnel racing is that the best setup for CG is from 30% / 33% like James sayed.

<a href="http://i11.photobucket.com/albums/a184/rac...38/DSC08116.jpg" target="_blank">http://i11.photobucket.com/albums/a184/rac...38/DSC08116.jpg</a>

<a href="http://i11.photobucket.com/albums/a184/rac...38/DSC08124.jpg" target="_blank">http://i11.photobucket.com/albums/a184/rac...38/DSC08124.jpg</a>

<a href="http://i11.photobucket.com/albums/a184/rac...38/DSC06956.jpg" target="_blank">http://i11.photobucket.com/albums/a184/rac...38/DSC06956.jpg</a>

Gr Marc

Hi Marc, Thanks a lot for your help, so in another word I must have the outboard a little heavy, because I made every thing by the rule, what looks strange to me is that the hull weight 8.3 kg complete but with out the one litter water IV bag in the nose of the Tunnel.

Thank you for your time Marc.

~~~`Winston`~~~

Your picture makes clear that your radiobox is in a good position.

The basic point: make the CG of your tunnel between 30 and 33% from the back end of the sponsons and after that you must test props and engine setup. (engine hight & trim)

I have run my Ossi with a prather 270 with a speed of 54 mph with stock Zenoah 260, (the first 30mph in my early message was not correct) have to do some more testing with 3 blade props.

Gr Marc

The height of my OB "the prop shaft" is one centimeter up from the sponsons. What is your tunnel Height and weight complete with out IV water bag Marc and no Fuel.

Thanks for your time.

~~~`Winston`~~~

 

[racejunkie538]

Winston
James is right, you messure fromt he back edge of the sponson, not the transom.

The CG of my Ossi is at 32% with 500 grams (17.6oz) weight in front. It messures 15.62 inch from the back edge of the sponsons.

Hope this will help you, its difficult to say my CG is at the good point right now, but I think I'm getting close.

Today some nice VooDoo props arrived, so I will do some more testing. Will let you know.

Gr Marc

Hi Marc, So there must be something wrong, my CG is 13`` from the sponson with 1 litter water IV bag in the nose of the Hull, total weight is 9.7 kg = 21.3 lbs

Don't you think so???????? <_< :huh:

~~~`Winston`~~~

Winston

So your CG at this moment is around 28% from the back of the sponsons. What I believe from 1:1 F1 tunnel is the CG from 33% and further forward from back end. Take a look at the picture where the boat is hanging in the crane and you will see where the halters are attachged.

Don't know the complete exact weight of my engine, but I put my radiobox as far as possible in front of the nose.

I know Arian Hendriks with his Ossi was also running with 1000gr of weight in in the nose of the hull, what I ment is that it's not that wrong.

How is your boat running, is it near flip over at high speed. What you can try is to put some more weight in font so you will be at 33% CG, but what comes up must come down to. So if you hit a wave and it will lift the boat up a bit, by the next wave it comes down quicker and the boat will go like a submarine. (that is why 1:1 tunnels will not run with to much swell)

What I know from scale F1 tunnel racing is that the best setup for CG is from 30% / 33% like James sayed.

<a href="http://i11.photobucket.com/albums/a184/rac...38/DSC08116.jpg" target="_blank">http://i11.photobucket.com/albums/a184/rac...38/DSC08116.jpg</a>

<a href="http://i11.photobucket.com/albums/a184/rac...38/DSC08124.jpg" target="_blank">http://i11.photobucket.com/albums/a184/rac...38/DSC08124.jpg</a>

<a href="http://i11.photobucket.com/albums/a184/rac...38/DSC06956.jpg" target="_blank">http://i11.photobucket.com/albums/a184/rac...38/DSC06956.jpg</a>

Gr Marc

Hi Marc, Thanks a lot for your help, so in another word I must have the outboard a little heavy, because I made every thing by the rule, what looks strange to me is that the hull weight 8.3 kg complete but with out the one litter water IV bag in the nose of the Tunnel.

Thank you for your time Marc.

~~~`Winston`~~~

Your picture makes clear that your radiobox is in a good position.

The basic point: make the CG of your tunnel between 30 and 33% from the back end of the sponsons and after that you must test props and engine setup. (engine hight & trim)

I have run my Ossi with a prather 270 with a speed of 54 mph with stock Zenoah 260, (the first 30mph in my early message was not correct) have to do some more testing with 3 blade props.

Gr Marc

The height of my OB "the prop shaft" is one centimeter up from the sponsons. What is your tunnel Height and weight complete with out IV water bag Marc and no Fuel.

Thanks for your time.

~~~`Winston`~~~

Winston

Tunnel weight with out fuel and front ballast is 8.8 KG (19.5 lb) prop height is 11 milimeter up from sponsons.

Gr Marc