Dynamic Review - Page 3

LenBFP · Feb 27, 2004, 08:14 PM

My flying buddy has had two Dynamic hotliners. It has a propencity to tip stall if it is heavy an you are a little careless. He started running eight KAN 1050 cells and although the flights are not as long, the beast is better behaved. It is quick and kinda like a pattern flyer. He likes it, but lost the latest last week and it dug quite a hole. Got disoriented. I don't know if it came this way but he had the whole bottom of the wing red. It gets out there quick and becomes hard to tell which side is up, the red helps.

exempt · Feb 27, 2004, 09:03 PM

Oh great, just what I wanted to hear before I maiden it

So I guess I won't be able to thermal it around like I had planned

I'll just be a lead foot and fly it fast and try to keep it close.

Scott

rcjetpilot · Feb 28, 2004, 12:34 PM

Hi Folks,

I also bought one, seems like a decent kit for the money. Mine will be powered by an Aveox 36/24/2 on 7-RC2400 cells. What sold me on this plane was the video, seemed to fly very nicely.

I just started to assemble it, will definitely add 1/4 light ply to support the landing gear.

How did everyone secure the battery pack? Any pictures?

Bob.

exempt · Feb 28, 2004, 04:13 PM

I just made this custom "strap" from velcro and that Hi-Tec life preserver foam stuff that comes with the radios. Probonded it down and glued a "stop" forward of the servos for the pack to rest against. Oh I will just post a pic later this evening! I did find it difficult to find a home for the RX though, mines below the and slightly aft of the servos.

Scott

rcjetpilot · Feb 29, 2004, 11:04 AM

Hi All,

Did everyone use the supplied pushrod setup or did you install something else? Gluing the linkage clips to the carbon rod seems troubling, like failing at the worst possible time...

Bob

Andy W · Feb 29, 2004, 11:33 AM

Read my review, which is why this thread was started.
..a

Roger Felton · Mar 01, 2004, 12:52 AM

Be sure to mount the rudder and elevator servos up high enough that the reciever will fit underneath. The reciever I used is a Hitec Super Slim, mounted to the fuselage floor with adhesive backed velcro. I used short extensions for the aileron servos so the wing could be easily removed if needed.

Roger Felton · Mar 01, 2004, 12:57 AM

I used the supplied flexible control rods, but used DuBro hardware on the ends. I just CA'd the inner core into the brass ends. This seems to be very secure - I tested one with pliers and a vise.

Roger Felton · Mar 01, 2004, 01:04 AM

The battery ends up farther forward than I had imagined. 2" ahesive backed velcro on the floor of the fuselage with a velcro strap to hold it down. Because the battery is now a little hard to get to I'm just going to charge it in place, and go fly something else while it is charging.

Roger Felton · Mar 01, 2004, 01:11 AM

A shot of the aileron servos. I used the supplied ends for the aileron strip horns, but DuBro stuff for the rest.

The runway has mostly dried out, but there was a strong gusty crosswind today so the maiden didn't happen. Perhaps tomorrow if the weather gods smile on me...

exempt · Mar 02, 2004, 12:11 AM

Well things DID NOT go well on the Dynamic maiden flight! I knew this thing would fly like a rock with wings due to the very high wing loading and EXTREME tendency to TIP STALL at any speed lower than say, space shuttle re-entry speeds, but man this thing needed MASSIVE speed to stay aloft and to maintain control at a comfortable level. After a couple of minor pre-launch snags including landing gear problems and other things I finally got it up and it did climb FAIRLY well but I could tell instantly that my center of gravity was off (although it was set as per instructions) felt tail heavy but I managed to bring it around into my first turn at around 90' maybe 100' the right wing tip stalled and I was UNABLE to recover, it spiraled into terra firma at a pretty high rate of speed. Damage is not as bad as it could have been but the wing will need extensive repair, although the fuse was unscathed. I am a little bummed but, as is often the case, the plane itself is the "cheap" part of the whole equation, my expensive motor and electronics are fine. I will march forward and expand my knowledge.

Scott

Andy W · Mar 02, 2004, 07:04 AM

Sorry for your experience, this has certainly not been my experience. Mine leaps into the air easily (with 8 sub-C cells, even better with 8 1900FAUP's), and is stable and easy to fly. It has never "tip stalled" as people like to say, it has no bad tendancies whatsoever. Plus, I have my control throws set to pretty wild and my CG pretty far back (I like to do snap rolls and such) and if that doesn't induce such behaviour, I don't know what will. It's not a slow-stick, so yes it is more stable at speed, but I fly mostly half-throttle with full power reserved for climbs/verticals. It's not a difficult model to fly - far easier to manage than any hotliner I've owned, for example.
..a

exempt · Mar 02, 2004, 12:42 PM

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!

Andy W · Mar 03, 2004, 06:32 AM

I'm pretty sure mine balances on the heads of the wing mount bolts.. what about yours?

Roger Felton · Mar 08, 2004, 03:46 PM

Finally got some decent conditions last Friday, but the Dynamic miserably failed it's range check. That evening I swapped out the Hitec Super Slim reciever for a new Electron 6 that I had for another project. Saturday morning saw perfect contitions for a test flight, and the range check was flawless. To make a long story short, the Dynamic leaps into the air after a short ground roll and climbs out nicely. The recommended control throws gives it plenty of control authority with no tendancy for over controlling. While it dosen't have unlimited vertical, it does climb very nicely with a pullup from a high speed pass. The rolls were very close to axial. The Dynamic does take a bit of space to land as it glides very well. I suspect the CG could be moved back a bit as it wanted to climb a bit from a dive, and I was running out of elevator in the landing flare. The only difficulty I had was with the takeoffs. I have no previous experience with taildraggers, and not much experience with using the rudder, so I wasn't quite prepared for how much right rudder was needed on takeoff. Fortunately there wasn't anything in the way as it headed for left field :-)
All in all this is a very nice plane, with no detectable bad habits. Like Andy says, this plane likes to fly fast!

Mar 01, 2004, 12:52 AM	#37
Roger Felton Registered User Join Date: Aug 2002 Location: Carson City, Nevada, United States Posts: 165	Be sure to mount the rudder and elevator servos up high enough that the reciever will fit underneath. The reciever I used is a Hitec Super Slim, mounted to the fuselage floor with adhesive backed velcro. I used short extensions for the aileron servos so the wing could be easily removed if needed. Attached Thumbnails 81.4 KB · Views: 308

Mar 01, 2004, 12:57 AM	#38
Roger Felton Registered User Join Date: Aug 2002 Location: Carson City, Nevada, United States Posts: 165	I used the supplied flexible control rods, but used DuBro hardware on the ends. I just CA'd the inner core into the brass ends. This seems to be very secure - I tested one with pliers and a vise. Attached Thumbnails 65.4 KB · Views: 275

Mar 01, 2004, 01:04 AM	#39
Roger Felton Registered User Join Date: Aug 2002 Location: Carson City, Nevada, United States Posts: 165	The battery ends up farther forward than I had imagined. 2" ahesive backed velcro on the floor of the fuselage with a velcro strap to hold it down. Because the battery is now a little hard to get to I'm just going to charge it in place, and go fly something else while it is charging. Attached Thumbnails 68.8 KB · Views: 283

Mar 01, 2004, 01:11 AM	#40
Roger Felton Registered User Join Date: Aug 2002 Location: Carson City, Nevada, United States Posts: 165	A shot of the aileron servos. I used the supplied ends for the aileron strip horns, but DuBro stuff for the rest. The runway has mostly dried out, but there was a strong gusty crosswind today so the maiden didn't happen. Perhaps tomorrow if the weather gods smile on me... Attached Thumbnails 93.8 KB · Views: 351

Mar 08, 2004, 03:46 PM	#45
Roger Felton Registered User Join Date: Aug 2002 Location: Carson City, Nevada, United States Posts: 165	Dynamic maiden flight Finally got some decent conditions last Friday, but the Dynamic miserably failed it's range check. That evening I swapped out the Hitec Super Slim reciever for a new Electron 6 that I had for another project. Saturday morning saw perfect contitions for a test flight, and the range check was flawless. To make a long story short, the Dynamic leaps into the air after a short ground roll and climbs out nicely. The recommended control throws gives it plenty of control authority with no tendancy for over controlling. While it dosen't have unlimited vertical, it does climb very nicely with a pullup from a high speed pass. The rolls were very close to axial. The Dynamic does take a bit of space to land as it glides very well. I suspect the CG could be moved back a bit as it wanted to climb a bit from a dive, and I was running out of elevator in the landing flare. The only difficulty I had was with the takeoffs. I have no previous experience with taildraggers, and not much experience with using the rudder, so I wasn't quite prepared for how much right rudder was needed on takeoff. Fortunately there wasn't anything in the way as it headed for left field :-) All in all this is a very nice plane, with no detectable bad habits. Like Andy says, this plane likes to fly fast!

Feb 27, 2004, 08:14 PM	#31
LenBFP It's a Great Day to Fly Join Date: Jan 2002 Location: Melbourne Beach, Florida Posts: 3,149	My flying buddy has had two Dynamic hotliners. It has a propencity to tip stall if it is heavy an you are a little careless. He started running eight KAN 1050 cells and although the flights are not as long, the beast is better behaved. It is quick and kinda like a pattern flyer. He likes it, but lost the latest last week and it dug quite a hole. Got disoriented. I don't know if it came this way but he had the whole bottom of the wing red. It gets out there quick and becomes hard to tell which side is up, the red helps.

Feb 27, 2004, 09:03 PM	#32
exempt Registered User Join Date: May 2001 Location: Providence, RI Posts: 378	Oh great, just what I wanted to hear before I maiden it So I guess I won't be able to thermal it around like I had planned I'll just be a lead foot and fly it fast and try to keep it close. Scott

Feb 28, 2004, 12:34 PM	#33
rcjetpilot Watts is life... Join Date: Sep 2003 Location: Monmouth Co, New Jersey, United States Posts: 2,354	Hi Folks, I also bought one, seems like a decent kit for the money. Mine will be powered by an Aveox 36/24/2 on 7-RC2400 cells. What sold me on this plane was the video, seemed to fly very nicely. I just started to assemble it, will definitely add 1/4 light ply to support the landing gear. How did everyone secure the battery pack? Any pictures? Bob.

Feb 28, 2004, 04:13 PM	#34
exempt Registered User Join Date: May 2001 Location: Providence, RI Posts: 378	I just made this custom "strap" from velcro and that Hi-Tec life preserver foam stuff that comes with the radios. Probonded it down and glued a "stop" forward of the servos for the pack to rest against. Oh I will just post a pic later this evening! I did find it difficult to find a home for the RX though, mines below the and slightly aft of the servos. Scott

Feb 29, 2004, 11:04 AM	#35
rcjetpilot Watts is life... Join Date: Sep 2003 Location: Monmouth Co, New Jersey, United States Posts: 2,354	Hi All, Did everyone use the supplied pushrod setup or did you install something else? Gluing the linkage clips to the carbon rod seems troubling, like failing at the worst possible time... Bob

Feb 29, 2004, 11:33 AM	#36
Andy W That sickening crunch.. Join Date: Jun 1999 Location: Marietta, GA Posts: 39,779	Read my review, which is why this thread was started. ..a

Mar 02, 2004, 12:11 AM	#41
exempt Registered User Join Date: May 2001 Location: Providence, RI Posts: 378	Well things DID NOT go well on the Dynamic maiden flight! I knew this thing would fly like a rock with wings due to the very high wing loading and EXTREME tendency to TIP STALL at any speed lower than say, space shuttle re-entry speeds, but man this thing needed MASSIVE speed to stay aloft and to maintain control at a comfortable level. After a couple of minor pre-launch snags including landing gear problems and other things I finally got it up and it did climb FAIRLY well but I could tell instantly that my center of gravity was off (although it was set as per instructions) felt tail heavy but I managed to bring it around into my first turn at around 90' maybe 100' the right wing tip stalled and I was UNABLE to recover, it spiraled into terra firma at a pretty high rate of speed. Damage is not as bad as it could have been but the wing will need extensive repair, although the fuse was unscathed. I am a little bummed but, as is often the case, the plane itself is the "cheap" part of the whole equation, my expensive motor and electronics are fine. I will march forward and expand my knowledge. Scott

Mar 02, 2004, 07:04 AM	#42
Andy W That sickening crunch.. Join Date: Jun 1999 Location: Marietta, GA Posts: 39,779	Sorry for your experience, this has certainly not been my experience. Mine leaps into the air easily (with 8 sub-C cells, even better with 8 1900FAUP's), and is stable and easy to fly. It has never "tip stalled" as people like to say, it has no bad tendancies whatsoever. Plus, I have my control throws set to pretty wild and my CG pretty far back (I like to do snap rolls and such) and if that doesn't induce such behaviour, I don't know what will. It's not a slow-stick, so yes it is more stable at speed, but I fly mostly half-throttle with full power reserved for climbs/verticals. It's not a difficult model to fly - far easier to manage than any hotliner I've owned, for example. ..a

Mar 02, 2004, 12:42 PM	#43
exempt Registered User Join Date: May 2001 Location: Providence, RI Posts: 378	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!

Mar 03, 2004, 06:32 AM	#44
Andy W That sickening crunch.. Join Date: Jun 1999 Location: Marietta, GA Posts: 39,779	I'm pretty sure mine balances on the heads of the wing mount bolts.. what about yours?