1948
New Member
Any Challanger owners that can assist with some fuel consumption data
Fuel Consumption Birchwood Challanger 380 Aft Cabin
- Thread starter 1948
- Start date
oldgit
Well-Known Member
Hi and welcome to forum .Several peeps on here have had this sort of boat,but what engines does she have?
Some had the Mermaid 215 Hp.
Some had the Mermaid 215 Hp.
miket
Well-Known Member
Assuming twin engines around 300hp each it will probably be about 1 mpg (total).
PCUK
Well-Known Member
20hp per gallon naturally aspirated
23hp per gallon turbo charged
23hp per gallon turbo charged
Whitelighter
Well-Known Member
Are those HP/Gallon at max rpm?
1948
New Member
Thankyou for the welcome.
She has 2 X 330hp turbo iveco's with 450 hours and they are 9 years old.
She has 2 X 330hp turbo iveco's with 450 hours and they are 9 years old.
1948
New Member
the engines are 2 X 330 turbs. What engine revs are you relating to.
1948
New Member
Please tell me what revs you are relating these figures to
Chris_d
Well-Known Member
Order the MBM test report on this boat, they tested a Challanger 380 called Timbo with 330hp Ivecos a few years ago, all fuel consumption and speed data was in the test. Just search YBW.com for the report.
miket
Well-Known Member
Around 80% of max RPM.
I had 2 x 306 V Pentas, max rpm 3800. We cruised at 3200 around 20 knots. Broom 37 (1991)
I had 2 x 306 V Pentas, max rpm 3800. We cruised at 3200 around 20 knots. Broom 37 (1991)
PCUK
Well-Known Member
Jez,
It's a rule of thumb for consumption at any revs.
It's a rule of thumb for consumption at any revs.
1948
New Member
I have read the report and it has completly confused me. Here is an extract of it below.
RPM KNTS GPH MPG RANGE
1800 13.3 6.8 1.95 312
2000 16.5 10.0 1.65 264
2200 20.6 14.19 1.46 234
2400 23.5 19.4 1.21 194
2650 26.2 28.2 .93 149
(Sorry the figures are so close above in its layout, its the forum format) <span style="color:red"> </span> /forums/images/graemlins/confused.gif.
Fuel Capacity 200 Imp Gall.
Are the above GPH figures with one engine running or both.
Lets take the 1800 rpm at 13.3 knts using 1.95 gph
200 gall/6.8 gph = 29.41 hrs X 13.3knts = 391 miles - 20% = 312 miles. Is this posible. I think they have worked it out using one engine. Could a 330hp engine only use 3.4 GPH at 1800 rpm.
If we use it at 6.8gph on one engine (13.6 on both ) then the range is only 156 ( allowing 20% ) Not 312 !!!!!!!!!!!
Now if we go to the 2200 rpm and the 2400rpm it makes a little more sense. Is the 14.19 and the 19.4 using both engines or one ??
If I do have a range of 312 at 1800 rpm =how far could I travel at 1600rpm or 1400rpm????????????
Could this be the first Challanger to circumnavigate Ireland without refuelling???????????????????????
I dont want to run out of fuel half way around.
HHHHEEEELLLLLPPPPP
RPM KNTS GPH MPG RANGE
1800 13.3 6.8 1.95 312
2000 16.5 10.0 1.65 264
2200 20.6 14.19 1.46 234
2400 23.5 19.4 1.21 194
2650 26.2 28.2 .93 149
(Sorry the figures are so close above in its layout, its the forum format) <span style="color:red"> </span> /forums/images/graemlins/confused.gif.
Fuel Capacity 200 Imp Gall.
Are the above GPH figures with one engine running or both.
Lets take the 1800 rpm at 13.3 knts using 1.95 gph
200 gall/6.8 gph = 29.41 hrs X 13.3knts = 391 miles - 20% = 312 miles. Is this posible. I think they have worked it out using one engine. Could a 330hp engine only use 3.4 GPH at 1800 rpm.
If we use it at 6.8gph on one engine (13.6 on both ) then the range is only 156 ( allowing 20% ) Not 312 !!!!!!!!!!!
Now if we go to the 2200 rpm and the 2400rpm it makes a little more sense. Is the 14.19 and the 19.4 using both engines or one ??
If I do have a range of 312 at 1800 rpm =how far could I travel at 1600rpm or 1400rpm????????????
Could this be the first Challanger to circumnavigate Ireland without refuelling???????????????????????
I dont want to run out of fuel half way around.
HHHHEEEELLLLLPPPPP
Chris_d
Well-Known Member
Looks right to me, a lot to be gained from going slow /forums/images/graemlins/smile.gif
Works for my engines I have 2x150 and get roughly half your consumption and twice the mpg at the same speeds /forums/images/graemlins/grin.gif
Works for my engines I have 2x150 and get roughly half your consumption and twice the mpg at the same speeds /forums/images/graemlins/grin.gif
1948
New Member
I have read the test report report in YBM and it has completly confused me. Here is an extract of it below.
RPM KNTS GPH MPG RANGE
1800 13.3 6.8 1.95 312
2000 16.5 10.0 1.65 264
2200 20.6 14.19 1.46 234
2400 23.5 19.4 1.21 194
2650 26.2 28.2 .93 149
(Sorry the figures are so close above in its layout, its the forum format) .
Fuel Capacity 200 Imp Gall.
Are the above GPH figures with one engine running or both.
Lets take the 1800 rpm at 13.3 knts using 1.95 gph
200 gall/6.8 gph = 29.41 hrs X 13.3knts = 391 miles - 20% = 312 miles. Is this posible. I think they have worked it out using one engine. Could a 330hp engine only use 3.4 GPH at 1800 rpm.
If we use it at 6.8gph on one engine (13.6 on both ) then the range is only 156 ( allowing 20% ) Not 312 !!!!!!!!!!!
Now if we go to the 2200 rpm and the 2400rpm it makes a little more sense. Is the 14.19 and the 19.4 using both engines or one ??
If I do have a range of 312 at 1800 rpm =how far could I travel at 1600rpm or 1400rpm????????????
Could this be the first Challanger to circumnavigate Ireland without refuelling???????????????????????
I dont want to run out of fuel half way around.
HHHHEEEELLLLLPPPPP
RPM KNTS GPH MPG RANGE
1800 13.3 6.8 1.95 312
2000 16.5 10.0 1.65 264
2200 20.6 14.19 1.46 234
2400 23.5 19.4 1.21 194
2650 26.2 28.2 .93 149
(Sorry the figures are so close above in its layout, its the forum format) .
Fuel Capacity 200 Imp Gall.
Are the above GPH figures with one engine running or both.
Lets take the 1800 rpm at 13.3 knts using 1.95 gph
200 gall/6.8 gph = 29.41 hrs X 13.3knts = 391 miles - 20% = 312 miles. Is this posible. I think they have worked it out using one engine. Could a 330hp engine only use 3.4 GPH at 1800 rpm.
If we use it at 6.8gph on one engine (13.6 on both ) then the range is only 156 ( allowing 20% ) Not 312 !!!!!!!!!!!
Now if we go to the 2200 rpm and the 2400rpm it makes a little more sense. Is the 14.19 and the 19.4 using both engines or one ??
If I do have a range of 312 at 1800 rpm =how far could I travel at 1600rpm or 1400rpm????????????
Could this be the first Challanger to circumnavigate Ireland without refuelling???????????????????????
I dont want to run out of fuel half way around.
HHHHEEEELLLLLPPPPP
No1_Moose
Well-Known Member
Pretty safe to say that all the figures are with both engines running! For a start there is no way a boat like that will do anymore than 12-13kts flat out on one engine.
