Nitro Models Rutan Defiant
#26
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From: Gauteng, SOUTH AFRICA
The only thing that I never did was fly it with one engine, I should have tried with just the front engine, I believe I did get the CofG as close as possible but the issues with multiple thrust lines which are exagerated by the front canards being able to be anywhere from 10 degress negative to 10 degrees positive with no indication in the instructions as to there angle relative to the main wing is I believe problematic. I was fortunate and had 4 or 5 flights which all nearly ended in disaster, one word of advice, if it starts to porpoise and pitch up and down close the throttles, mine actually flew (glided) well - this suggested that the issues were related to when the motors were working and this is why I am suggesting the thrust lines are the issue. Good luck with your machine, it looks very nice in the air and is a croud pleaser but holy cow - a handful is an understatement
#28
I dowbt if anyone still has one of these models to maiden yet but thought I would add my experience of this model and its COG.
I read everything availible on line about this model and knew there was a thrust/balance issue so left mine in its box for two years.
ThenI seenone fly on youtube I asked the pilot where his cog was and he said 1/2 inchaft ofthe leading edge of the main wing and to add 1/8 positive reflex to the ailerons.
With this information I thought it was time to fly her so I set the cog as above and added the reflex, took her to the field and told everyone there to expect a crash, Well it could have not gone any better.
She needed a few clicks down and after that flew like a trainer, cog is spot on at 1/2 inch, thrust lines are spot on as se never climbs on power or dives at idle, floats in at slow speed with ease, its a strange model to see in the sky but flys very well. I rolled, spinned and had her inverted on the maiden.
Nice plane with proper cog.
I read everything availible on line about this model and knew there was a thrust/balance issue so left mine in its box for two years.
ThenI seenone fly on youtube I asked the pilot where his cog was and he said 1/2 inchaft ofthe leading edge of the main wing and to add 1/8 positive reflex to the ailerons.
With this information I thought it was time to fly her so I set the cog as above and added the reflex, took her to the field and told everyone there to expect a crash, Well it could have not gone any better.
She needed a few clicks down and after that flew like a trainer, cog is spot on at 1/2 inch, thrust lines are spot on as se never climbs on power or dives at idle, floats in at slow speed with ease, its a strange model to see in the sky but flys very well. I rolled, spinned and had her inverted on the maiden.
Nice plane with proper cog.
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rutanman (09-24-2020)



Thank you very much for the reply.

