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Thread: My TFL Pursuit coming up to speed.

  1. #31
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    I have just checked the cg on my stock Pursuit with an Aquastar 3974-2200kv motor fitted & Seaking 180 esc,the esc is on one side of the boat behind the motor. 2 Gens Ace 3s 5000mah weighing 370g each are in the centre on the stock battery tray ( batteries pulled almost to the motor) & i have 30% cog. If i push the batteries a bit more forward just under the deck i get 32% cog.

  2. #32

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    Quote Originally Posted by Turbo Dan-O View Post
    Man, that's crazy to me. So, your boat is around 30% with two batteries that far under the deck? Seems like it would be a snow plow!

    Here's mine at 30% or a little less...
    Keep in mind my Esc is in the back of the boat along with a GPS. I also have a larger and heavier than stock dual pickup rudder on my boat. My 3d printed battery tray has been stragetically placed to and is much lighter than the stock long tray. You have a very large esc and a whopper of a motor upfront in your boat that you have to offset the difference by placing your batteries further back.
    Last edited by MADRCER; 07-26-2018 at 10:11 PM.
    Zelos Twin 36 (90mph), Miss Geico 29v3 (83.5mph), Veles 29 (80mph), TFL Pursuit (76.7mph), UL-19 (75mph), Sonicwake 36 (71mph), Motley Crew Cat (47.5mph), H-King Relentless v2 (43mph), Barbwire XL, Feilun FT011, AquaCraft Rescue 17, Atlantic II Tug

  3. #33
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    If the cg is a little further forward than 30% with the battery as far back in the centre of the boat as it will go & the bow is a bit low, add a bit of positive to the stinger ( 1 maybe 2 degrees ). Also check the bottom of the hull for any hook @ the rear.

  4. #34
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    uk
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    MADRCER is your motor mount still in the stock position or have you moved it back towards the transom.

  5. #35

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    I am building a Pursuit

    I have installed a carbon fiber liner in the bottom and up the sides, 19" long.
    I then put a strip of fiberglass tape 1-1/4" wide around the seem between the deck and the hull for extra reinforcement.
    1/8" ply inside the transom.

    I am now ready to install the motor mount.
    In the picture it is not installed yet.
    My question is the cg measurement ( from the outside of the transom forward)that I should end up with.

    This boat will be for the "P" Speck Mono class -racing.

    4S-2P - 5000 packs - 36mm Motor

    Larry
    Attached Images Attached Images
    Past NAMBA- P Mono -1 Mile Race Record holder
    Past NAMBA- P Sport -1 Mile Race Record holder
    Bump & Grind Racing Props -We Like Em Smooth & Wet

  6. #36
    Join Date
    Jan 2013
    Location
    Ga
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    1,260

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    30%= 9.6in. I have a 4070 1650kv I just put in there for the hell of it. Here is inside balanced at 30%.

    IMG_20180715_160317966.jpg

  7. #37

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    heres where mine balances out at 30% ....aka.....about 9.5 inches from transom. when i tried a lipo on the tray up front it was very nose heavy during balance test . even still i managed 55mph .i havent got much more running them on the sides ,although i just made a stinger adjustment ,i have not got to run it yet .hopefully monday .
    but here is where my side mounted lipos balance out at .

    stock motor mount location .leopard 4082 and flycolor 150 mounted up front .x645 prop
    Attached Images Attached Images
    Last edited by boatsrnew2me; 07-15-2018 at 08:57 PM.
    volantex vector pro ,proboat veles 29 , traxxas spartan, hobbyking/tfl pursuit ,ft009 with rescue rigging

  8. #38

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    Quote Originally Posted by TRUCKPULL View Post
    I am building a Pursuit

    I have installed a carbon fiber liner in the bottom and up the sides, 19" long.
    I then put a strip of fiberglass tape 1-1/4" wide around the seem between the deck and the hull for extra reinforcement.
    1/8" ply inside the transom.

    I am now ready to install the motor mount.
    In the picture it is not installed yet.
    My question is the cg measurement ( from the outside of the transom forward)that I should end up with.

    This boat will be for the "P" Speck Mono class -racing.

    4S-2P - 5000 packs - 36mm Motor

    Larry
    9.5 inches from the back of the transom is where you would want to start for race waters. Below is a picture of my boat balanced on a dowel of a magazine rack sitting right at 28% or so (with my batteries up front). I did have two short pieces of pool noodle on each side of the dowel to hold the boat straight up while I took the picture.

    Screenshot_2018-07-15-20-00-14.jpg Screenshot_2018-07-15-20-12-42.jpg
    Last edited by MADRCER; 07-15-2018 at 09:23 PM. Reason: error and added pictures
    Zelos Twin 36 (90mph), Miss Geico 29v3 (83.5mph), Veles 29 (80mph), TFL Pursuit (76.7mph), UL-19 (75mph), Sonicwake 36 (71mph), Motley Crew Cat (47.5mph), H-King Relentless v2 (43mph), Barbwire XL, Feilun FT011, AquaCraft Rescue 17, Atlantic II Tug

  9. #39

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    Quote Originally Posted by MADRCER View Post
    9.5 inches from the back of the transom is where you would want to start for race waters. Below is a picture of my boat balanced on a dowel of a magazine rack sitting right at 29-30% with my batteries up front. I did have two short pieces of pool noodle on each side of the dowel to hold the boat straight up while I took the picture.

    Attachment 160309 Attachment 160311
    how about that ,mine was front heavy with a 6s up front .hey i got a magazine rack like that in my man basement...lol....just gave me a new idea
    volantex vector pro ,proboat veles 29 , traxxas spartan, hobbyking/tfl pursuit ,ft009 with rescue rigging

  10. #40

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    Everyone has a rack like that I bet...Lol FYI My math was off that was around 28% still with batteries up front. I do like 30% better for just ripping around.
    Zelos Twin 36 (90mph), Miss Geico 29v3 (83.5mph), Veles 29 (80mph), TFL Pursuit (76.7mph), UL-19 (75mph), Sonicwake 36 (71mph), Motley Crew Cat (47.5mph), H-King Relentless v2 (43mph), Barbwire XL, Feilun FT011, AquaCraft Rescue 17, Atlantic II Tug

  11. #41

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    Quote Originally Posted by MADRCER View Post
    9.5 inches from the back of the transom is where you would want to start for race waters. Below is a picture of my boat balanced on a dowel of a magazine rack sitting right at 28% or so with my batteries up front. I did have two short pieces of pool noodle on each side of the dowel to hold the boat straight up while I took the picture.
    Attachment 160312
    My aim is to have as much weight at the CG or as close as possible.
    I would to end up with the batteries centered on each side of the motor.
    I will get all the hardware installed first, then arrange the motor and mount with the batteries, ESC, and radio etc. for the 9.5"

    Here is a picture of what I would like to end up with. Items are just sitting there, not mounted yet.

    Larry
    Attached Images Attached Images
    Last edited by TRUCKPULL; 07-16-2018 at 12:39 AM.
    Past NAMBA- P Mono -1 Mile Race Record holder
    Past NAMBA- P Sport -1 Mile Race Record holder
    Bump & Grind Racing Props -We Like Em Smooth & Wet

  12. #42

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    Quote Originally Posted by TRUCKPULL View Post
    My aim is to have as much weight at the CG or as close as possible.
    I would to end up with the batteries centered on each side of the motor.
    I will get all the hardware installed first, then arrange the motor and mount with the batteries, ESC, and radio etc. for the 9.5"

    Here is a picture of what I would to end up with. Items are just sitting there, not mounted yet.

    Larry
    Looks good. You just using Velcro for mounting your batteries or are you mounting trays?
    Zelos Twin 36 (90mph), Miss Geico 29v3 (83.5mph), Veles 29 (80mph), TFL Pursuit (76.7mph), UL-19 (75mph), Sonicwake 36 (71mph), Motley Crew Cat (47.5mph), H-King Relentless v2 (43mph), Barbwire XL, Feilun FT011, AquaCraft Rescue 17, Atlantic II Tug

  13. #43

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    Quote Originally Posted by MADRCER View Post
    Looks good. You just using Velcro for mounting your batteries or are you mounting trays?
    I have tried trays once in the past, On this one I may just go with the Velcro and straps epoxied to the hull.

    Larry
    Past NAMBA- P Mono -1 Mile Race Record holder
    Past NAMBA- P Sport -1 Mile Race Record holder
    Bump & Grind Racing Props -We Like Em Smooth & Wet

  14. #44

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    Quote Originally Posted by TRUCKPULL View Post
    My aim is to have as much weight at the CG or as close as possible.
    I read somewhere that you actually want the weight distributed as far way from the CG as possible in a boat because it increases stability. Seems counter-intuitive at first but makes sense. Unfortunately it's hard to implement and keep power wires short.

  15. #45

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    Does weight forward and aft of the CG NOT make for teeter-totter effect?

    Larry
    Past NAMBA- P Mono -1 Mile Race Record holder
    Past NAMBA- P Sport -1 Mile Race Record holder
    Bump & Grind Racing Props -We Like Em Smooth & Wet

  16. #46
    Join Date
    Aug 2010
    Location
    uk
    Posts
    2,808

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    Quote Originally Posted by MADRCER View Post
    9.5 inches from the back of the transom is where you would want to start for race waters. Below is a picture of my boat balanced on a dowel of a magazine rack sitting right at 28% or so (with my batteries up front). I did have two short pieces of pool noodle on each side of the dowel to hold the boat straight up while I took the picture.

    Screenshot_2018-07-15-20-00-14.jpg Screenshot_2018-07-15-20-12-42.jpg
    Did you have the stock foam that comes in the boat up front or no foam up there.

  17. #47

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    Quote Originally Posted by martin View Post
    Did you have the stock foam that comes in the boat up front or no foam up there.
    A couple pieces of pool noodle. I trashed the stock foam
    Zelos Twin 36 (90mph), Miss Geico 29v3 (83.5mph), Veles 29 (80mph), TFL Pursuit (76.7mph), UL-19 (75mph), Sonicwake 36 (71mph), Motley Crew Cat (47.5mph), H-King Relentless v2 (43mph), Barbwire XL, Feilun FT011, AquaCraft Rescue 17, Atlantic II Tug

  18. #48

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    That’s running well.
    I’m thinking after mine comes back from the body shop I can get 70+ with the castle 2200kv
    5s2p pushed by a m645.
    Short runs only.

  19. #49

    Default Pursuit hits 74mph on 6s!!!

    Here is another quick run of my Pursuit 74mph was the top speed on this one. Thanks to Chris for the Awesome propwork.
    https://www.youtube.com/watch?v=yLsQ...ature=youtu.be

    74mph pursuit.jpg IMG_0934.jpg

    Zelos Twin 36 (90mph), Miss Geico 29v3 (83.5mph), Veles 29 (80mph), TFL Pursuit (76.7mph), UL-19 (75mph), Sonicwake 36 (71mph), Motley Crew Cat (47.5mph), H-King Relentless v2 (43mph), Barbwire XL, Feilun FT011, AquaCraft Rescue 17, Atlantic II Tug

  20. #50

    Default TFL Pursuit hits 76mph on 6s.

    It was too windy and I probably shouldn't have been trying to run on the extreme edge with this boat, but I ran it anyways and I got a new personal best speed of 76mph by the data logger and 75mph by the GPS device. I ran the boat yesterday and got 74.7mph but this run tops that one so I won't be uploading that run. At this speed the boat needs almost glass water or it can get upset pretty quick. It handles very well in the 65mph range on any waters but when you get over 70mph is when it gets dicey. The temps were 115° motor and 123° on the ESC on this run. Thanks to Chris Hoffmann for the prop work.

    75mph purusit.jpg 76MPH PURSUIT.jpg
    https://www.youtube.com/watch?v=awMQiB9MDBk

    Last edited by MADRCER; 07-30-2018 at 07:47 PM.
    Zelos Twin 36 (90mph), Miss Geico 29v3 (83.5mph), Veles 29 (80mph), TFL Pursuit (76.7mph), UL-19 (75mph), Sonicwake 36 (71mph), Motley Crew Cat (47.5mph), H-King Relentless v2 (43mph), Barbwire XL, Feilun FT011, AquaCraft Rescue 17, Atlantic II Tug

  21. #51

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    Here's another 6s run. 76.7mph was the top speed by the gps on this one. Prop was prepped by Chris Hoffmann (dasboata)
    https://www.youtube.com/watch?v=VWcBmrBFNgY

    Last edited by MADRCER; 09-04-2018 at 10:41 PM.
    Zelos Twin 36 (90mph), Miss Geico 29v3 (83.5mph), Veles 29 (80mph), TFL Pursuit (76.7mph), UL-19 (75mph), Sonicwake 36 (71mph), Motley Crew Cat (47.5mph), H-King Relentless v2 (43mph), Barbwire XL, Feilun FT011, AquaCraft Rescue 17, Atlantic II Tug

  22. #52

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    Nice speeds on that motor!
    are you running the T-180 esc?
    Jesus is King .......NAMBA20...Caterpillar UL-1, P-Spec OM29, P-Mono DF33, P-Spec JAE, Aussie 33" Hydro-LSH, Sprintcat CC2028 on 8s, PT SS45 Q Hydro, PS295 UL-1 power, OSE Brothers Outlaw QMono 4-sale, Rio 51z CC2028 on 8s

  23. #53

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    Quote Originally Posted by Brushless55 View Post
    Nice speeds on that motor!
    are you running the T-180 esc?
    Thanks Brushless! Yes it's a T-180.
    Zelos Twin 36 (90mph), Miss Geico 29v3 (83.5mph), Veles 29 (80mph), TFL Pursuit (76.7mph), UL-19 (75mph), Sonicwake 36 (71mph), Motley Crew Cat (47.5mph), H-King Relentless v2 (43mph), Barbwire XL, Feilun FT011, AquaCraft Rescue 17, Atlantic II Tug

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