Sebart Mini Avanti w/ K45 build thread
06-28-2023, 09:22 PM
#1127
That K55G4 is at a good price, cheaper than both a K45g4 and a k65g4. Do you think it is a good match for the avanti? I do not need more heavy junk that barely stand the landing speed it needs.
In the end a few hundreds bucks is worth it to have a great flying airplane. Ive read, The k45 is a bit unreliable?
In the end a few hundreds bucks is worth it to have a great flying airplane. Ive read, The k45 is a bit unreliable?
06-29-2023, 09:40 AM
#1131
Yea, I wouldn't want the residual thrust. This thread is old enough that anyone contemplating over a P20 was nuts, then 45 became the norm. I personally wouldn't fly it on anything bigger than a 45 but I'd never get it down and stopped at my field if it was faster and heavier or had more residual thrust.
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RCISFUN (06-30-2023)
06-30-2023, 04:23 AM
#1135
My Feedback: (1)
I am building another one. I will use X45 Light, HAB single wall pipe and mounting kit. (I have a Gumania pipe and its 2-1/2 times heavier than HAB.)
I found a new source of wheels from RC Castle. LD Technology. They look like JP wheels but the brake wires plug in the same as Electron does. And they costs 40% less than JPs.
https://www.rc-castle.com/index.php?...oduct_id=10071
I found a new source of wheels from RC Castle. LD Technology. They look like JP wheels but the brake wires plug in the same as Electron does. And they costs 40% less than JPs.
https://www.rc-castle.com/index.php?...oduct_id=10071
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essyou35 (07-03-2023)
07-02-2023, 10:29 PM
#1136
My Feedback: (3)
I am building another one. I will use X45 Light, HAB single wall pipe and mounting kit. (I have a Gumania pipe and its 2-1/2 times heavier than HAB.)
I found a new source of wheels from RC Castle. LD Technology. They look like JP wheels but the brake wires plug in the same as Electron does. And they costs 40% less than JPs.
https://www.rc-castle.com/index.php?...oduct_id=10071
I found a new source of wheels from RC Castle. LD Technology. They look like JP wheels but the brake wires plug in the same as Electron does. And they costs 40% less than JPs.
https://www.rc-castle.com/index.php?...oduct_id=10071
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essyou35 (07-03-2023)
07-02-2023, 11:03 PM
#1137
you will most probably need to add weight aft, going for the heavier pipe is not at all a bad idea. i have the K-30 and grumania pipe in mine and need to remove 230 gr. from the front (according to Xicoy CG device) or add some weight far aft to achieve the required CG at 145mm....
07-03-2023, 05:00 AM
#1138
My Feedback: (1)
you will most probably need to add weight aft, going for the heavier pipe is not at all a bad idea. i have the K-30 and grumania pipe in mine and need to remove 230 gr. from the front (according to Xicoy CG device) or add some weight far aft to achieve the required CG at 145mm....
I like the HAB pipe + their G10 mounts, because the installation is so easy.
I use Grumania pipes too, they are great.
07-10-2023, 11:39 PM
#1141
My Feedback: (3)
Pleased to say that i have maiden my Mini Avanti last Saturday. i had added 50 Gr lead aft and programmed all throws as per manual. What i can say is woooow. What a nice docile jet CG was spot on and jet tracks perfectly.... i programmed crow and used it for landing. simply perfect.
i had a stuck nose gear for the first landing and still i was able to land on the mains and keep the nose straight until speed was bled and i came to a stop with not even a scratch on the doors that remained open.
after fixing the nose gear problem, second flight was even better with some maneuvers loops rolls, slow roll, four point roll, split S....this jet handles like a big pattern ship...
flew 5 minutes (timer) and landed with half tank full. i can easily go for 7 minute flights and have plenty fuel left...
i had a stuck nose gear for the first landing and still i was able to land on the mains and keep the nose straight until speed was bled and i came to a stop with not even a scratch on the doors that remained open.
after fixing the nose gear problem, second flight was even better with some maneuvers loops rolls, slow roll, four point roll, split S....this jet handles like a big pattern ship...
flew 5 minutes (timer) and landed with half tank full. i can easily go for 7 minute flights and have plenty fuel left...
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dr.tom (07-11-2023)
08-04-2023, 06:49 PM
#1142
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I use 45mm JP wheels at the rear, 40mm at the front. I want the nose pointing a bit lower on the ground. Beware, my M Avanti take off and land on asphalt.
If larger wheel size is used, it certainly help in grass field but, if the pin in the strut bend a little, the landing gear might stuck in the fuselage.
If larger wheel size is used, it certainly help in grass field but, if the pin in the strut bend a little, the landing gear might stuck in the fuselage.
09-11-2023, 07:34 AM
#1144
Sebart Avanti Mini Largest Nose Wheel
Hey Guys, I am having issues rotating off grass with my Mini Avanti, powered via KT K45. I believe it to be the small wheels. I have 50mm for rears with brakes and 46mm on the front. What is the largest nose wheel that can be put on the stock nose strut? It appears to be no more than 50mm but maybe 55mm will fit with alteration? I read somewhere on this thread where someone mentioned altering the front strut but no details of what they did. I appreciate any help.
09-11-2023, 02:09 PM
#1145
Hey Guys, I am having issues rotating off grass with my Mini Avanti, powered via KT K45. I believe it to be the small wheels. I have 50mm for rears with brakes and 46mm on the front. What is the largest nose wheel that can be put on the stock nose strut? It appears to be no more than 50mm but maybe 55mm will fit with alteration? I read somewhere on this thread where someone mentioned altering the front strut but no details of what they did. I appreciate any help.
The black line is my CG position.
. Here is a old video of my jet showing grass ops.
09-11-2023, 05:32 PM
#1146
I have been flying my Mini Avanti for many years now with a X45 in it, and am still using the original retracts and wheels. I did put some 3mm ply under the front retract to raise the nose slightly and always use 10 degrees of flap for take-off, which makes a huge difference in take-off distance off grass. My jet had a K45 G2 engine in it at one stage, which made it quite a heavy jet. I estimate that I lost 800gms of weight by installing the X45! Also, the fuel tank sits slightly ahead of the CG, so this will create a forward CG when full, so maybe balance with zero fuel towards the rear most CG position. I do not use a header tank, just a felt clunk, so it's possible that a header tank may be forward of the main tank compounding the nose heaviness
The black line is my CG position.
. Here is a old video of my jet showing grass ops. https://www.youtube.com/watch?v=-gwl0nuxLnY
The black line is my CG position.
. Here is a old video of my jet showing grass ops. https://www.youtube.com/watch?v=-gwl0nuxLnY
Last edited by ddfwaj; 09-11-2023 at 05:36 PM.
09-11-2023, 06:36 PM
#1147
Can you please post some pictures of your installation? For starters,,you can mount the batteries over the tank and remove the lead. It's up to you whether you remove the header tank or try and mount it over the main tank as well. Also, I don't use the cockpit tub, just have a pilot sitting on a support. This allows room into the canopy for other staff. I think mine weights 4.2kg and my cg is 150mm back.
09-11-2023, 07:08 PM
#1148
Good Stuff Aussie1, that's certainly a great combination you have there. I can recall when we use to run PST-600's, similar power levels to an X45 but so much more weight, and long spool times...I guess that's progress.
BRG, Frank
BRG, Frank
09-11-2023, 07:30 PM
#1149
Yeah, I had a couple of those PST engines, great little turbines! The X45 is also great because it will still power most 60 size jets, but at a reduced take-off weight.
