Dynamic Review - Page 4

Andy W · Mar 10, 2004, 07:44 AM

I realized I mis-calculated the weight of the FAUP's.. they're actually 1.37oz.. Still, a big improvement over full-size sub-C's..
..a

RCWorks · Mar 10, 2004, 10:36 AM

Quote:

Originally posted by exempt
My COG must have been terribly off, although I can't imagine it being that off. I have flown enough to know what an unbalanced model feels like in the air and that was exactly what this felt like, so I am not blaming the model at all, it was definitely pilot error It's possibly the battery may have shifted in flight (but not likely) I guess I wasn't "precision" enough when balancing? Well no matter, I'm going to fix it and fly it again anyway!

I would say nose heavy, I use the Great Planes CG Machine, I swear by it as long as the instructions are good and from a known good model company (One that really tests the product.) I have not had any problems since using it, I also use it to document my own kits.

exempt · Mar 10, 2004, 10:57 PM

I'm ordering one now! Thanks.

Scott

Roger Felton · Mar 11, 2004, 12:14 AM

Low wing models, such as the Dynamic, are a bit different to balance as the center of gravity is located significantly above the bottom of the wing. A good trick to get around this is to mark the balance point on the top of the wing and balance the plane upside down.
I've gotten a few more flights on my Dynamic and I'm really starting to love it. While it's pretty speedy, I'm amazed at how much it can be slowed down while maintaining good control. I just wish it had better duration. It goes through the 9 cell pack of FAUP's pretty quickly. I guess it's time to get on the LiPoly bandwagon :-)

Andy W · Mar 11, 2004, 07:23 AM

Quote:

Originally posted by Roger Felton
While it's pretty speedy, I'm amazed at how much it can be slowed down while maintaining good control.

This pretty much echos my experience, but not exempt's. I wish he'd let us know where his balanced - as I said, mine is around the wing mount bolts, I believe that's the right spot? Even though it's not as easy to balance a low-wing model upright, it's still pretty simple to just find a point at which the model will balance on two spread fingers..

Quote:

I just wish it had better duration. It goes through the 9 cell pack of FAUP's pretty quickly. I guess it's time to get on the LiPoly bandwagon

I get pretty long flights, but not the 15 minutes many are looking for.. I'm happy with the FAUP's, for the price, I'd be curious to see what LiPo solutions you come up with (and of course, always happy to test an appropriate solution if a vendor wanted to provide one!

)
..a

Andy W · Mar 11, 2004, 07:23 AM

Quote:

Originally posted by Roger Felton
While it's pretty speedy, I'm amazed at how much it can be slowed down while maintaining good control.

This pretty much echos my experience, but not exempt's. I wish he'd let us know where his balanced - as I said, mine is around the wing mount bolts, I believe that's the right spot? Even though it's not as easy to balance a low-wing model upright, it's still pretty simple to just find a point at which the model will balance on two spread fingers..

Quote:

I just wish it had better duration. It goes through the 9 cell pack of FAUP's pretty quickly. I guess it's time to get on the LiPoly bandwagon

I get pretty long flights, but not the 15 minutes many are looking for.. I'm happy with the FAUP's, for the price, I'd be curious to see what LiPo solutions you come up with (and of course, always happy to test an appropriate solution if a vendor wanted to provide one!

)
..a

wd6awp · Mar 27, 2004, 11:24 AM

A video of Roger's Dynamic...

http://www.wd6awp.org/movies/Roger's%20Dynamic.mov

rcjetpilot · Apr 24, 2004, 10:41 AM

Hi Folks,

Could I get a recomendation on control throws? It appears the instruction papers I have did not include any suggestions.

Thanks, Bob

Andy W · Apr 24, 2004, 12:28 PM

"lots"..
She doesn't mind plenty of throw - snaps nicely..
..a

chris sherman · Apr 27, 2004, 08:58 PM

hello everybody. I have been reading the post and found that I don"t seem to be the only one with balance problems on the dynamic. I put a16 25 4 mega motor in it and I can get it to balance at recomended spot but I have to push the sanyo 8 cell pack almost to the motor.what will I do with my 3s2p lipoly?Should I try adding weight? Seems like it will be tough to remove the pack from velcro with the batt stuffed way in the front. any advice on this would really help thanks.

rcjetpilot · Apr 27, 2004, 09:12 PM

Hi Chris,

I'm using an Aveox 36/24/2 with two types of packs:
8 GP3300's
7 RC2400's

Balancing has the packs well inside the canopy section, though its still a bit forward with 1 or 2 cells partially inside the foward fuselage. No flight yet but soon

What type of sanyo cells are you using?

Andy W · Apr 27, 2004, 09:16 PM

Chris, I just sent this to the email you sent..

CG is good per provided instructions. It also happens to be right at the wing mounting bolt location. If it balances on the bolt heads, you're good.
..a

chris sherman · Apr 27, 2004, 10:11 PM

wow that was a fast replie hope my plane will be. I am using sanyo 1700 8 cell nimhs @11oz. as a base pack. I also have 8cell 1700 nicad @ 15 oz. and a 3s2p lipoly @ 9 oz. that I would like to use. I guess I could make up some kind of a tray to insert and remove packs. I wounder how much play you have with the cg on this model? I have other planes that were a half inch or so off the cg marked on the plans and flew the same as always. I have beefed up the landing gear as to Andys advice and that was a little weight forward of the cg but my pack gos in beyond the front hatch opening compleatly to balance.

chris sherman · Apr 27, 2004, 10:21 PM

ooo

rcjetpilot · Apr 27, 2004, 10:26 PM

Chris,

A suggestion, if you need to add weight, how about using your 4 cell RX pack as the ballast? You could velcro mount them way inside the fuselage. I checked you power setup on Motocalc, looks like 10 1950's would be sweet

Bob.

Apr 27, 2004, 10:11 PM	#58
chris sherman Registered User Join Date: Apr 2004 Posts: 5	wow that was a fast replie hope my plane will be. I am using sanyo 1700 8 cell nimhs @11oz. as a base pack. I also have 8cell 1700 nicad @ 15 oz. and a 3s2p lipoly @ 9 oz. that I would like to use. I guess I could make up some kind of a tray to insert and remove packs. I wounder how much play you have with the cg on this model? I have other planes that were a half inch or so off the cg marked on the plans and flew the same as always. I have beefed up the landing gear as to Andys advice and that was a little weight forward of the cg but my pack gos in beyond the front hatch opening compleatly to balance. Last edited by chris sherman; Apr 27, 2004 at 10:57 PM.

Apr 27, 2004, 10:21 PM	#59
chris sherman Registered User Join Date: Apr 2004 Posts: 5	ooo Last edited by chris sherman; May 01, 2004 at 12:17 AM. Reason: over with

Mar 10, 2004, 07:44 AM	#46
Andy W That sickening crunch.. Join Date: Jun 1999 Location: Marietta, GA Posts: 39,796	I realized I mis-calculated the weight of the FAUP's.. they're actually 1.37oz.. Still, a big improvement over full-size sub-C's.. ..a

Mar 10, 2004, 10:57 PM	#48
exempt Registered User Join Date: May 2001 Location: Providence, RI Posts: 378	I'm ordering one now! Thanks. Scott

Mar 11, 2004, 12:14 AM	#49
Roger Felton Registered User Join Date: Aug 2002 Location: Carson City, Nevada, United States Posts: 165	Low wing models, such as the Dynamic, are a bit different to balance as the center of gravity is located significantly above the bottom of the wing. A good trick to get around this is to mark the balance point on the top of the wing and balance the plane upside down. I've gotten a few more flights on my Dynamic and I'm really starting to love it. While it's pretty speedy, I'm amazed at how much it can be slowed down while maintaining good control. I just wish it had better duration. It goes through the 9 cell pack of FAUP's pretty quickly. I guess it's time to get on the LiPoly bandwagon :-)

Mar 27, 2004, 11:24 AM	#52
wd6awp Registered User Join Date: Mar 2002 Location: SoCal Posts: 209	A video of Roger's Dynamic... http://www.wd6awp.org/movies/Roger's%20Dynamic.mov

Apr 24, 2004, 10:41 AM	#53
rcjetpilot Watts is life... Join Date: Sep 2003 Location: Monmouth Co, New Jersey, United States Posts: 2,354	Hi Folks, Could I get a recomendation on control throws? It appears the instruction papers I have did not include any suggestions. Thanks, Bob

Apr 24, 2004, 12:28 PM	#54
Andy W That sickening crunch.. Join Date: Jun 1999 Location: Marietta, GA Posts: 39,796	"lots".. She doesn't mind plenty of throw - snaps nicely.. ..a

Apr 27, 2004, 08:58 PM	#55
chris sherman Registered User Join Date: Apr 2004 Posts: 5	hello everybody. I have been reading the post and found that I don"t seem to be the only one with balance problems on the dynamic. I put a16 25 4 mega motor in it and I can get it to balance at recomended spot but I have to push the sanyo 8 cell pack almost to the motor.what will I do with my 3s2p lipoly?Should I try adding weight? Seems like it will be tough to remove the pack from velcro with the batt stuffed way in the front. any advice on this would really help thanks.

Apr 27, 2004, 09:12 PM	#56
rcjetpilot Watts is life... Join Date: Sep 2003 Location: Monmouth Co, New Jersey, United States Posts: 2,354	Hi Chris, I'm using an Aveox 36/24/2 with two types of packs: 8 GP3300's 7 RC2400's Balancing has the packs well inside the canopy section, though its still a bit forward with 1 or 2 cells partially inside the foward fuselage. No flight yet but soon What type of sanyo cells are you using?

Apr 27, 2004, 09:16 PM	#57
Andy W That sickening crunch.. Join Date: Jun 1999 Location: Marietta, GA Posts: 39,796	Chris, I just sent this to the email you sent.. CG is good per provided instructions. It also happens to be right at the wing mounting bolt location. If it balances on the bolt heads, you're good. ..a

Apr 27, 2004, 10:26 PM	#60
rcjetpilot Watts is life... Join Date: Sep 2003 Location: Monmouth Co, New Jersey, United States Posts: 2,354	Chris, A suggestion, if you need to add weight, how about using your 4 cell RX pack as the ballast? You could velcro mount them way inside the fuselage. I checked you power setup on Motocalc, looks like 10 1950's would be sweet Bob.