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View Full Version : Now runs ok !! ,Fanguard is better 2mm or 2.5mm or 3mm or 4mm ?



OSPREY - n/a
9-Sep-08, 05:30 PM
http://www.youtube.com/watch?v=cEUuHiYrimc (www.youtube.com/watch?v=cEUuHiYrimc)

sixpackpert - n/a
9-Sep-08, 05:36 PM
Good work dude.



Just one thing, get the fan guard on before running it again. It will save you from serious injury in the event of something getting into the fan and making it explode.

OSPREY - n/a
9-Sep-08, 05:44 PM
yes I will create fan guard !

the hovercraft need some work to complete (new P clips ,electrick, painting ..)

thank you.

Dave - n/a
9-Sep-08, 06:54 PM
Looks good, well done!



One other thing, what revs are you pulling? I say cos the tzr needs the airbox to rev to opimum.

OSPREY - n/a
9-Sep-08, 07:05 PM
16 tooth H down pulley , 54 tooth H top , Truflo fan blades .

I must run the engine max at 9000 rpm ~ 45hp !

I will put the airbox ,this is the first start !

what is the cost for one good fan guard ?

Dave - n/a
9-Sep-08, 07:35 PM
Ah, 9000 rpm seems a bit too low to me it will only do that if it is tuned to produce power at that output, standard is max power at 10,000 or 10,500.



A guard is about 52 from ken at km products.

tonybroad - n/a
10-Sep-08, 09:09 AM
peak power on a TZR is 9800rpm and power drops off sharply after that

Sean Atterbury - n/a
10-Sep-08, 09:44 AM
Great work, but a must is the fan guard, I had my craft cover sitting on the floor in front to the right of my craft while testing like you and it got sucked in. Broke only one blade luckily I was attached to the lanyard and could get it stopped quite quick.

OSPREY - n/a
10-Sep-08, 11:11 AM
index.php?t=getfile&id=1775&private=0

Dave - n/a
10-Sep-08, 03:08 PM
So your using standard pipes then i take it?

OSPREY - n/a
10-Sep-08, 10:29 PM
Fanguard is better 2mm or 2.5mm or 3mm or 4mm ?

Inox or steal ?

thanks for your help

OSPREY - n/a
16-Sep-08, 07:24 PM
Fanguard is better 2mm or 2.5mm or 3mm or 4mm ?

Inox or steal ?

GavinParson - n/a
17-Sep-08, 02:48 PM
Fanguard is better 2mm or 2.5mm or 3mm or 4mm ?

Inox or steal ?




You gonna steal a guard?

sixpackpert - n/a
17-Sep-08, 03:28 PM
<table border="0" align="center" width="90%" cellpadding="3" cellspacing="1"><tr><td class="SmallText">OSPREY wrote on Tue, 16 September 2008 20&#58;24</td></tr><tr><td class="quote">
Fanguard is better 2mm or 2.5mm or 3mm or 4mm ?

Inox or steal ?




You gonna steal a guard?


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http://www.travel-destination-pictures.com/data/media/70/queens-guard_1403.jpg



http://www.jonrb.com/emoticons/hehe.gif

Vortex - n/a
17-Sep-08, 10:28 PM
What a load of dumbos...... OK Inox is French for stainless steel, you could make the guard out of stainless, expensive here in the UK or normal mild steel, Stainless will save you having to paint it or plastic coat it. As for material 2mm is ok 2.5 better 3.00 too thick.



We at Vortex manufacture guards but transport to Greece would be very expensive ...get one made locally.....get some 50*50 weld mesh and beat it into a dome shape over a dustbin, roll up a ring of 5mm wire and weld it to the outside...job done....sounds easy....but it isn't!!!



Keith

bufo - n/a
18-Sep-08, 07:15 PM
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We at Vortex manufacture guards but transport to Greece would be very expensive ...get one made locally.....get some 50*50 weld mesh and beat it into a dome shape over a dustbin, roll up a ring of 5mm wire and weld it to the outside...job done....sounds easy....but it isn't!!!
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I tried that... didn't work... now I make 4 mm inox with 6mm ring - 1step is ring made in circulate shablone than i curve each wire to right shape with curve mashine, than assamble the fanguard wire by wire... It takes several hours... but here is the look



http://www.bufocraft.net/world_airboat_racing_2008/airboat-racing-13.JPG



It is true you save time with painting... but when you calculate the time and cost of removing the welden blacks from inox and polishing the guard to shy... it costs about same or eaven more as painting, only qualitie is much better, because it not rust. I would chose inox, specialy if you use hover in sea water.

profqwerty - n/a
18-Sep-08, 10:14 PM
That...does look kinda nice http://hovercraft.org.uk/images/icons/smiley_icons/icon_cool.gif

Sean Atterbury - n/a
19-Sep-08, 07:09 AM
These Froghoverers seem to be making an impression. I guess Persistence pays in the end.

hovmart - n/a
19-Sep-08, 08:55 AM
big hole around carbs,not sure that would pass http://hovercraft.org.uk/images/icons/smiley_icons/icon_redface.gif

bufo - n/a
19-Sep-08, 04:27 PM
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big hole around carbs
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Just enough big to make carbs possible to service without taking fanguard of http://hovercraft.org.uk/images/icons/smiley_icons/icon_smile.gif

hovmart - n/a
19-Sep-08, 05:31 PM
and get hand through if you fell on it, or some thing go through the gard, rope,sponge,glove, BANG

bufo - n/a
19-Sep-08, 05:43 PM
<table border="0" align="center" width="90%" cellpadding="3" cellspacing="1"><tr><td class="SmallText">Quote:</td></tr><tr><td class="quote">
and get hand through if you fell on it, or some thing go through the gard, rope,sponge,glove, BANG
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So far it did not happen... it is only 6 cm hole http://hovercraft.org.uk/images/icons/smiley_icons/icon_smile.gif

hovmart - n/a
19-Sep-08, 05:45 PM
time will tell http://hovercraft.org.uk/images/icons/smiley_icons/icon_redface.gif

OSPREY - n/a
21-Oct-08, 10:51 AM
What a load of dumbos...... OK Inox is French for stainless steel, you could make the guard out of stainless, expensive here in the UK or normal mild steel, Stainless will save you having to paint it or plastic coat it. As for material 2mm is ok 2.5 better 3.00 too thick.



We at Vortex manufacture guards but transport to Greece would be very expensive ...get one made locally.....get some 50*50 weld mesh and beat it into a dome shape over a dustbin, roll up a ring of 5mm wire and weld it to the outside...job done....sounds easy....but it isn't!!!



Keith




<font color="darkblue">What is the weight of Fan guard made from :

1. 2mm

2. 2.5mm

3. 3mm

What’s the difference in weight between one fanguard 2.5mm and one 3mm ?

What welding electrode do you use ? (mm ?)

Thanks[/COLOR]

OSPREY - n/a
30-Nov-08, 05:28 PM
Stainless steel Fanguard is ready !! http://hovercraft.org.uk/images/icons/smiley_icons/icon_biggrin.gif http://hovercraft.org.uk/images/icons/smiley_icons/icon_thumbsup.gif



index.php?t=getfile&id=1994&private=0



index.php?t=getfile&id=1995&private=0

bufo - n/a
30-Nov-08, 05:40 PM
I gues the video from the sea you made was whitout fanguard installed...



... and you guys say I am crazy, because sometimes I forget to use kill switch http://hovercraft.org.uk/images/icons/smiley_icons/icon_biggrin.gif

OSPREY - n/a
30-Nov-08, 05:41 PM
haha !!!!!!!!

sixpackpert - n/a
30-Nov-08, 07:28 PM
Glad you've got the fan guard done.



Next thing is to sort out the tip clearance of your blades. The gap between the end of the blade and duct is mahoosive. If you get the gap down to 5-10mm then it will be more efficient and quiter.



Keep going friend and hope to get to Greece for a cruise sometime! http://hovercraft.org.uk/images/icons/smiley_icons/icon_biggrin.gif

bufo - n/a
1-Dec-08, 07:25 PM
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Next thing is to sort out the tip clearance of your blades. The gap between the end of the blade and duct is mahoosive. If you get the gap down to 5-10mm then it will be more efficient and quiter.
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I see rubber mounts at top of engine frame to duct...

If you make tip clearence lower, I think is better to remove the mounts at the top... or else you will crack the impeller...

OSPREY - n/a
2-Dec-08, 12:38 PM
The tip clearance is 7.5mm .This is the manufactures’ set ! The picture is from built period and the engine is not at the center (only 3 screws!!)

OSPREY - n/a
4-Dec-08, 07:47 PM
<table border="0" align="center" width="90%" cellpadding="3" cellspacing="1"><tr><td class="SmallText">Quote&#58;</td></tr><tr><td class="quote">
Next thing is to sort out the tip clearance of your blades. The gap between the end of the blade and duct is mahoosive. If you get the gap down to 5-10mm then it will be more efficient and quiter.


I see rubber mounts at top of engine frame to duct...

If you make tip clearence lower, I think is better to remove the mounts at the top... or else you will crack the impeller...
</td></tr></table>



All frames must have mounts ! I think is better to put mounts and in your hovercraft !

hovmart - n/a
4-Dec-08, 09:19 PM
mounts only work if what you are bolting them to is solid http://hovercraft.org.uk/images/icons/smiley_icons/icon_rolleyes.gif most GRP ducts flex so they are not realy working as well as they could

sixpackpert - n/a
5-Dec-08, 08:12 AM
<table border="0" align="center" width="90%" cellpadding="3" cellspacing="1"><tr><td class="SmallText">bufo wrote on Mon, 01 December 2008 22&#58;25</td></tr><tr><td class="quote">
<table border="0" align="center" width="90%" cellpadding="3" cellspacing="1"><tr><td class="SmallText">Quote&#58;</td></tr><tr><td class="quote">
Next thing is to sort out the tip clearance of your blades. The gap between the end of the blade and duct is mahoosive. If you get the gap down to 5-10mm then it will be more efficient and quiter.


I see rubber mounts at top of engine frame to duct...

If you make tip clearence lower, I think is better to remove the mounts at the top... or else you will crack the impeller...
</td></tr></table>



All frames must have mounts ! I think is better to put mounts and in your hovercraft !
</td></tr></table>



Bolt the engine/fan frame directly to the hull/duct and use rubber mounts to mount the engine to the frame.