HobbyKing.com New Products Flash Sale
Reply
Thread Tools
Old Feb 01, 2006, 10:46 PM
Registered User
Joined Jan 2006
34 Posts
Discussion
need help with BUMP

ok so heres the specs
BUMP built from plans out of depron
auw 19 grams
motor SS red DD gws 2510
rx chariot car
batt 145

the problem is when i try flying it doesnt rise it just goes into a straight glide then dives ive messed around with the cog/downthrust and no avail

and if someone could tell me how to post pics ill put some of it thanx
lilpnoytonton is offline Find More Posts by lilpnoytonton
Reply With Quote
Sign up now
to remove ads between posts
Old Feb 01, 2006, 11:02 PM
Registered User
caseyjholmes's Avatar
riverside, CA
Joined Feb 2003
725 Posts
whats the wingspan and chord? (length and width?)
caseyjholmes is offline Find More Posts by caseyjholmes
Reply With Quote
Old Feb 01, 2006, 11:04 PM
Registered User
Joined Jan 2006
34 Posts
its 16 w and 3 chord
lilpnoytonton is offline Find More Posts by lilpnoytonton
Reply With Quote
Old Feb 01, 2006, 11:18 PM
Registered User
caseyjholmes's Avatar
riverside, CA
Joined Feb 2003
725 Posts
you should be fine weight wise =)
try balancing the plane back a bit more with some weight on the tail in tiny incraments. See if this helps any. What about playing with different props?
caseyjholmes is offline Find More Posts by caseyjholmes
Reply With Quote
Old Feb 01, 2006, 11:20 PM
a little kid at heart
poulsbobill's Avatar
Poulsbo, Wa
Joined Sep 2004
1,237 Posts
Quote:
Originally Posted by lilpnoytonton
ok so heres the specs
BUMP built from plans out of depron
auw 19 grams
motor SS red DD gws 2510
rx chariot car
batt 145

the problem is when i try flying it doesnt rise it just goes into a straight glide then dives ive messed around with the cog/downthrust and no avail

and if someone could tell me how to post pics ill put some of it thanx
Did you do a fet change on the transistors?...if not then the motor isnt getting enough power (amps) so you are not getting enough thrust. As i recall that motor and prop combo gets about 12 grams of thrust , should be enough thrust unless you built her real draggy.

Bill
poulsbobill is offline Find More Posts by poulsbobill
Reply With Quote
Old Feb 01, 2006, 11:23 PM
Registered User
Oregon, United States
Joined Jul 2004
1,138 Posts
To post pics just scroll down to MANAGE ATTACHMENTS. It is pretty easy from there.

Lets see some pics. Im thinking of building a bump!
Tony
Tshires is offline Find More Posts by Tshires
Reply With Quote
Old Feb 01, 2006, 11:24 PM
Registered User
Joined Jan 2006
34 Posts
no fet needed on the chariot atleast thats what ive been told
lilpnoytonton is offline Find More Posts by lilpnoytonton
Reply With Quote
Old Feb 01, 2006, 11:26 PM
Registered User
Oregon, United States
Joined Jul 2004
1,138 Posts
Fet?
Tshires is offline Find More Posts by Tshires
Reply With Quote
Old Feb 01, 2006, 11:47 PM
Registered User
Joined Jan 2006
34 Posts
well ill try with the diffrent props and weight and if that doesnt work im going to move on to my corsair build
specs
depron/ plans from free flight
motor/gearbox/prop SS geared 4:1 gws 5'3
rx chariot
batt 145

hope this one works
lilpnoytonton is offline Find More Posts by lilpnoytonton
Reply With Quote
Old Feb 01, 2006, 11:49 PM
Registered User
caseyjholmes's Avatar
riverside, CA
Joined Feb 2003
725 Posts
Quote:
Originally Posted by Tshires
Fet?
High speed/power switching transistor pulsed with PWM from an MCU to drive a motor in variable speeds =)
aka Electronic Speed Control (esc) for smaller sized models
caseyjholmes is offline Find More Posts by caseyjholmes
Reply With Quote
Old Feb 02, 2006, 12:08 AM
Registered User
Oregon, United States
Joined Jul 2004
1,138 Posts
OK so now I know what it does. Thanks!

Uhhmm does a Raiedentech chariot bit car guts need one to be used for this application?

Its the stunt car model with the spinning front end.
Tshires is offline Find More Posts by Tshires
Reply With Quote
Old Feb 02, 2006, 12:13 AM
Registered User
Joined Jan 2006
34 Posts
raidentech is currently on backorder i just ordered some from a fellow forumer =)
lilpnoytonton is offline Find More Posts by lilpnoytonton
Reply With Quote
Old Feb 02, 2006, 12:17 AM
Registered User
Oregon, United States
Joined Jul 2004
1,138 Posts
Yep! Thats the ones I have a whole case of them. I am going to use them for projects for my CAD/CAM high school students. A step up from the mouse trap race cars we just finished.

Anyway, Nice pics! Glad you got it figured out.

Do you think 16 year olds could make a bump?
Tshires is offline Find More Posts by Tshires
Reply With Quote
Old Feb 02, 2006, 12:20 AM
Registered User
Joined Jan 2006
34 Posts
well i can speak from experiance because im 16 and that would be great for a CAD class took two years of it built robots/hovercrafts out of plans i drew on CAD
lilpnoytonton is offline Find More Posts by lilpnoytonton
Reply With Quote
Reply


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Need help with digital camera!!!!!!!!! deadcell Electric Plane Talk 4 Jul 24, 2001 01:20 AM
Need help with ailerons! KMKAZE Electric Plane Talk 11 Jul 19, 2001 01:34 AM
Desperately need help with motor interference problem Ken Lapointe Electric Plane Talk 8 Jun 22, 2001 07:40 AM
I need help with motor timing. jtthebiggafigga Electric Plane Talk 3 Jun 10, 2001 12:12 AM
Need help with 400 for park flyer Cpietro Electric Plane Talk 2 May 21, 2001 02:35 AM