Andy Harris

Seems like a great model. My son has the Mini Pulse XT and a club member has the Pulse XT 40, the finish on the XT 40 is better. Both models can get a long way away quickly and both fly well ...  Andy

Chris  The running gear from my Dualsky Extra 260 is making its way into a Graupner Saphira, this is based on the same thought process as yourself, slightly heavier and stonger. My 260 had a spectacular mid-air disintegration. Andy 

Tonight I flew the Addiction in the dead calm after the thunderstorms.  Its been in sick bay but I've used some carbon fibre to beef up the tail wheel mounting. I've been mostly flying a Seb Art 30E Katana lately, from the take-off through the first roll I instantly recalled the sheer joy of the Addiction - wonderful. Mr Barnesboy -- I got a Graupner Saphira to replace the airframe of my Dualsky Extra 260, did you get another one? Andy 

Andy  --- Be mindful of the wallet strain there! Well done! 

Laptop and phone batteries have internal protection circuits. These are not used in modelling because they would get in the way of the high current short discharge times we use. 

No problem! I set mine up exactly as the manual states, which is a good 60 deg on maximum deflection. Apart from a 30 second try-out I didn't fly on high rates. The roll rate is akin to watching a food mixer! The elevator on high rates was really sid vicious, looked like a loop in its own length. Can't comment on the rudder, never got round to doing any knife edge. ...Andy 

Tom I'm looking at the remaining good wing:   On the aileron you have a 90 degree section where the hinge enters at a 45 degree angle, BUT it is a hollow section! the pin would go into air after penetrating the outer spar.  Ah value of having one to disect !   The wing is a different story.  Look from underneath.  Through the transparent covering you'll see that there's nowhere to get a pin from above or below.  The trailing edge of the wing is pretty thin at this point.   Therefore either the build ninjas come up with a solution, or I'd suggest doubling the hinges between the wing and aileron. Andy

Tom 11 flights, two test flights, two for the 'A',  six for practicing slow rolls and the final flight. As a postscript I was using Electrolite batteries that seemed to get better and better. Therefore the 820 Watts that I measured before the test flights could have become the full 1100 Watts in subsequent flights. The first two flights were very short, but I put this down to a fair sized model and 3700mAh batteries. When I mention quick, I really meant quick, With a Funtana 50 in the circuit I could see not just a difference but the ability to catch up within half a circuit. Timbo has warned in this very thread of over powering. I've looked at the remaining wing, can't see where pins would go on the aileron side without causing a weakness.  Next time I'll double up on the number of hinges. I really enjoyed the 'point and squirt' locked in feel of the model in the air, the landings were really easy. You're going to enjoy this one ...  Andy

Tom I'm envious you have some great flying ahead ! The 'accident investigation' thread is here: Catastrophic Failure My baseline thoughts are that it was the control horns that failed first, others feel that the hinges needed to be pinned. I've ordered another airframe since all the expensive bits survived! Andy 

Robotbirds and BRChobbies. Both do combo deals, so check their web shops in all 'motor' places because you can find the same products at different prices. Both are pleasant to deal with.

Ed Respect -- great innovation and resourcefulness! Andy 

Detectives, Gary, Peevie, Jetsome: The servos are connected on the furthest hole to give the required throws. Theres only one hole on the carbon fibre control horn.The detail shows that the wood broke rather than the glue (see pic above, but all four are the same)I saw both the wing and aileron separate long before they hit the groundI note that the control horn is still connected to the pushrod, this seems to have come out cleanish, can see the marks where the CA spread but no fragments of wood. So, esteemed crash detectives hows this: Control surfaces checked before flight, assumed good.Control horn becomes loose in flightAileron becomes sloppy, control horn pulls outAileron now free goes into resonance (flutter)As per Jetsome's observation wing shakes so hard it breaks internally and takes part of the fuselage side with itThrottle closed to minimise damage. Andy 

Here are the detailed photos, note how all the tabs have stayed in the wing: and here's the close-up

Detective Jetsome: Sir - your evidence is:  exhibit 'A' RH wing has aileron detached.               'B' the carbon fibre rods are intact and solid.               'C' the instructions and kit did not have pins for the aileron tabs The servos were JR 591, I had to change on on the right hand side after flight 5 (it was overshooting). Control surfaces thoroughly checked before flight, I did see both  ailerons fluttering just before failure, one of course could have been the reflection of the other. So AF could be number one suspect, I'll take a closer picture of the suspect aileron. Regards ... Andy 

Dear Forum Calling all model accident investigators ... There was no damage to the model before this happened, it had two test flights, then the 'A' test (3,4) the next six flights were fairly gentle (i.e not 3D) , with mostly aileron roll practice. On flight 11, I made a single circuit followed by a pair of aileron rolls, on the third circuit I could hear a fluttering sound as it flew into a 14mph wind. I could see both ailerons fluttering, then suddenly the right hand wing left the fuselage, inevitable carnage followed. You'll see in the pictures here that the innards of the wing came out like a hand from a glove. Here's the overview: Note that the left hand wind is in good shape, the right hand looksOK, but see later: This is the spar, as found with the wing tube still in place. Here's the view inside the wing, you can see all the parts have just parted company with the 'skin' of the wing. And finally as evidence: Here's the motor, it was turning a 13x8 prop and was measured at 830W static output, the Dualsky 260 is rated at 900W, note that this motor could deliver 1100W on a larger prop. The motor was supplied as part of the 'combo' deal. Note that the combo deal actually quotes a smaller motor. Club members present at the time reckon I should be requesting a new airframe ... what do you think? Regards Andy

Tom Welcome back to flying ... the Dualsky does fly very nice, but be careful its quite fragile.  Als Hobbies supplied me with a larger motor capable of 1.1kW, I think they may have been short of the one specified in the combo deal. Mine literally pulled itself apart in flight Friday night, a mid air disintegration.  Before that it had been easily out pacing 40 powered IC models in the circuit. So have a look at the motor part number and if its a biggy (you'll have to mod the cowl).  Think about propping the model so that it can't use all the available power. Andy 

Thunderbird is the the email client of the gods -- however it can have enthusiastic spam filtering ... andy

Cracking stuff  --- make that trainer work ! Andy 

I'd love to do a B-test on mine, I've started practicing all the manuvers. As soon as its light I check the weather to see if I can pop out and fly off dewy grass. My club were not happy about my taking the 'A' on the Addiction (too small, too light).  I got the Dualsky Extra 260 for the 'A', looking at the forum looks like I'll have to ask BarnseyBoy what he's getting next. I just ordered a Dystraction, v.small ep jobby ...Andy