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Sebart Avanti S Build Thread w/KT 180

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Old 01-21-2014, 07:51 PM
  #76
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Jet cats sit lower on the rails , I had that issue with a gbooster 160 so I put it in a jetcat mount problem solved.
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Old 01-21-2014, 10:12 PM
  #77
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Please be aware that there is also a difference in Jetcat mounts between engine types. Before the RX serie the shaft is substantial lower than the mount (6mm roughly) The RX and later series have centermounts if I am not mistaken.

I had to raise my 120SX 4 mm to align with the bell.

Cheers Mick.
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Old 01-21-2014, 10:17 PM
  #78
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Good to know I'm planning on a 140rx in mine or the gbooster I have for my tutor
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Old 01-23-2014, 05:30 PM
  #79
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My bird is here I can't wait to start on it, gotta finish customer turbo raven first. I'm impressed with the packing it comes in.
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Old 01-25-2014, 03:38 AM
  #80
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Finalizing build and with K170G fitted (awaiting arrival of pipe) weight dry tops @ 12.45kg.
C of G at present is nose heavy may have to move Turbine battery (awaiting pipe) for final balance.

Have noticed however the main oleo's are almost bottomed out.

Nosewheel is fine with spring resistance.

I fly of grass fields (never flown on bitumen) and at present I believe there would be a lot of transfer of bumps etc through to the airframe. At a quick glance am unsure if the spring can be replaced in the oleo for a stronger one. Any others got a similar situation with springs on main oleo's????
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Old 01-25-2014, 08:19 AM
  #81
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Just typed a huge reply and hit "reply thread" again arrghhhh. number 27, that is concerning about your gear, wonder if you got a bad batch or if thats the norm. I am planning on flying off a pretty rough grass field, so need to make sure there is enough support on those oleos! As far as the king tech lining up. I haven't fully mounted it yet, but it looks dead on when eye balling it.

I got the second tank from Gary, it fits perfect. I think a larger width was possible, but its already at 50 oz, not sure I want more weight than that. Dimensions are 6 3/8x4.5x3. If you order one, make sure you talk to Gary about the fittings you want. He and I had a little communication breakdown, even though we were on the phone! LOL He gave me a larger fitting for the main line that the 6mm festo will fit. No biggie, just used larger yellow tygon. One of my buddies swears by plumbing with the larger tubing on the bigger turbines for less resistance.

Really like the hardware the main tank came with. I used hysol on the two threaded fittings, almost sure it would leak without it. Soldered barbs everywhere and safety wired it. In hindsight, I wouldn't have minded being able to glue in the fittings on the tank. Its gonna look like an octopus once its all plumbed. However, I bet I'm in the minority and most modelers will appreciate having all the work done for them!

The vent fittings Seba provides are nice as well, very low profile. He planned two vents for the main tank. Just like my buddy likes larger tubing, makes sense to have less resistance on the draw side. Love to hear comments on this from someone more educated on the subject. I use the dream works vent system for my overflow tank on my other jets, so I switched over to them. Mentioned this before, I love these forstner bits!!!

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Old 01-27-2014, 01:03 AM
  #82
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Just putting mine together at the moment .
Tested the retract springs in the legs , yes mine are very very soft .
I would think mine will have very little travel when the jet is on the ground full with fuel .
With little travel and bottoming out on grass fields I have seen retract mounts break out of wings .
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Old 01-27-2014, 07:42 AM
  #83
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Quote:
Originally Posted by number27 View Post
Finalizing build and with K170G fitted (awaiting arrival of pipe) weight dry tops @ 12.45kg.
C of G at present is nose heavy may have to move Turbine battery (awaiting pipe) for final balance.

Have noticed however the main oleo's are almost bottomed out.

Nosewheel is fine with spring resistance.

I fly of grass fields (never flown on bitumen) and at present I believe there would be a lot of transfer of bumps etc through to the airframe. At a quick glance am unsure if the spring can be replaced in the oleo for a stronger one. Any others got a similar situation with springs on main oleo's????
Mine was the same. Just cut a length of Tygon tube a little shorter than the spring and install it inside, works like a rubber bump stop.
Mine is 12.7kg dry with a 140RX

BR, Gregg
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Old 01-27-2014, 12:19 PM
  #84
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Nice tip on the retract spring.

Will try that but I am going to investigate some alternate springs if possible at local bolt and spring store.
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Old 01-27-2014, 05:09 PM
  #85
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Quote:
Originally Posted by DrScoles View Post
Just typed a huge reply and hit "reply thread" again arrghhhh. number 27, that is concerning about your gear, wonder if you got a bad batch or if thats the norm. I am planning on flying off a pretty rough grass field, so need to make sure there is enough support on those oleos! As far as the king tech lining up. I haven't fully mounted it yet, but it looks dead on when eye balling it.

I got the second tank from Gary, it fits perfect. I think a larger width was possible, but its already at 50 oz, not sure I want more weight than that. Dimensions are 6 3/8x4.5x3. If you order one, make sure you talk to Gary about the fittings you want. He and I had a little communication breakdown, even though we were on the phone! LOL He gave me a larger fitting for the main line that the 6mm festo will fit. No biggie, just used larger yellow tygon. One of my buddies swears by plumbing with the larger tubing on the bigger turbines for less resistance.

Really like the hardware the main tank came with. I used hysol on the two threaded fittings, almost sure it would leak without it. Soldered barbs everywhere and safety wired it. In hindsight, I wouldn't have minded being able to glue in the fittings on the tank. Its gonna look like an octopus once its all plumbed. However, I bet I'm in the minority and most modelers will appreciate having all the work done for them!

The vent fittings Seba provides are nice as well, very low profile. He planned two vents for the main tank. Just like my buddy likes larger tubing, makes sense to have less resistance on the draw side. Love to hear comments on this from someone more educated on the subject. I use the dream works vent system for my overflow tank on my other jets, so I switched over to them. Mentioned this before, I love these forstner bits!!!

Thanks for the pics and the work on the extra tank Mike. I've got one coming for mine from Jet Tech as well.

My engine saga continues..... Oli sent me an e-mail on Saturday night saying they (Ultimate Jets) had the 180s "in stock" and would I still like one?

Being the doubing "Thomas" I've become since playing with this turbine stuff started, I elected to wait and call Houston (where Ulitmate is located) this morning to see if the engines were in fact at the Houston store? Nope.... "It's in Germany"... note that I said "It's" not "they"......

Called Mr. Redman and he's not seen any 180's, no shipping notices and in fact JetCat Germany won't answer his e-mails.

So I call Ultimate back; "are you guys going to ship the "engines" to Houston or what? If you get 'em in your hands before the JetCat's show up, I'll buy the beastie. Answer; no there's only one engine and someone in the Emirates want's it, so since you've been waiting we're offering it to you and if you don't take it, it'll go somewhere in the mid-East..... How long to get it here I ask? 4 to 5 business days is the reply, so I bought the Behotec. Whether or not it's going to show up in Southern California the first part of next week is anybody's guess IMHO, but we'll see....

I don't know about you guys, but I'm having a TON of fun and I'm not even the one assembling mine.... UGH! lol
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Old 01-27-2014, 05:38 PM
  #86
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Mine is in shop beside the raven I'm building for a customer an incentive to get it done so I can start mine. Good thread and pics so far. Kinda nice to order a jet and get it in the same week or so not 6 mos. and oh I need all yer doh now. Sebart are great peeps to deal with.
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Old 01-27-2014, 09:58 PM
  #87
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Quote:
Originally Posted by Zeeb View Post
Thanks for the pics and the work on the extra tank Mike. I've got one coming for mine from Jet Tech as well.

My engine saga continues..... Oli sent me an e-mail on Saturday night saying they (Ultimate Jets) had the 180s "in stock" and would I still like one?

Being the doubing "Thomas" I've become since playing with this turbine stuff started, I elected to wait and call Houston (where Ulitmate is located) this morning to see if the engines were in fact at the Houston store? Nope.... "It's in Germany"... note that I said "It's" not "they"......

Called Mr. Redman and he's not seen any 180's, no shipping notices and in fact JetCat Germany won't answer his e-mails.

So I call Ultimate back; "are you guys going to ship the "engines" to Houston or what? If you get 'em in your hands before the JetCat's show up, I'll buy the beastie. Answer; no there's only one engine and someone in the Emirates want's it, so since you've been waiting we're offering it to you and if you don't take it, it'll go somewhere in the mid-East..... How long to get it here I ask? 4 to 5 business days is the reply, so I bought the Behotec. Whether or not it's going to show up in Southern California the first part of next week is anybody's guess IMHO, but we'll see....

I don't know about you guys, but I'm having a TON of fun and I'm not even the one assembling mine.... UGH! lol
get ahold of Vogelsang. They should have Hammer 180's in stock. I have a 170 and its strong. Awesome engines with great support.

PaulD
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Old 01-27-2014, 11:38 PM
  #88
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Which end of the springs do you place the tygon the yellow or red spring end please?
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Old 01-28-2014, 08:58 AM
  #89
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Quote:
Originally Posted by number27 View Post
Which end of the springs do you place the tygon the yellow or red spring end please?
I used 5mm diameter Tygon and it's around 14mm long. If you want it firmer go to say 18mm.


Gregg
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Old 01-28-2014, 08:59 AM
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Oh, the yellow end because that is the softer spring
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Old 01-28-2014, 09:01 AM
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BTW I would spend some time and make sure the main gear blocks are well glued. It looks to me that they use a thermo setting (hot glue) at the factory. Definately would want to get some epoxy into the wing gear area...
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Old 01-28-2014, 09:29 AM
  #92
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Quote:
Originally Posted by PaulD View Post
get ahold of Vogelsang. They should have Hammer 180's in stock. I have a 170 and its strong. Awesome engines with great support.

PaulD
Ummm..... Thanks for the thought but I won't go there. Already had my experience with Gotz and Thomas over a Tomahawk 2.0 ViperJet. Turbo was great on gettting me the 140+ for the model but I dread the day it might have to go for service, I think I'd just send it back to Germany.....
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Old 01-28-2014, 11:19 AM
  #93
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Gary, KING TECH! You will save $1000, and you'll have it by Friday. The manual is very good, and I've seen time and time again on RCU how good the customer service is! Its cool that Barry is part of things here on RCU. He called me to verify my shipping address and congratulated me on our new baby… nice touch for sure.

Speaking of baby, three week old and potty training a three year old is kicking my behind lately. Not a tremendous amount of progress. I have photo documented what I have done, I'll wait to get a little more this weekend and post.
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Old 01-30-2014, 03:18 AM
  #94
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Have sourced some better springs via my good friend Ian and these appear the bees knees. Did have the tygon in and it was a good alternative as well.

110mm AB ring from Xicoy and Jet Products Australia (Phil) along with his pipe.

build is moving along. Installation of pipe and final fitout this weekend and should maiden next weekend all being well.

Weather bad this weekend imminent fallout from cyclone up north
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Old 01-30-2014, 06:26 PM
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For those of you concerned with stock tank size I happened to have a carf tutor/hawk tank I believe 4.2 Ltrs and it fits quite well.

Kevin
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Old 02-03-2014, 02:15 AM
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Almost there. Home made fuel tank holds 5 litres for the big thirsty Kingtech 170G.

C of G just in front of 250mm. Keeping it slightly nose heavy for first flights and see how it handles.

Still unhappy with main Oleo springs. Either too soft or with tygon too hard and little movement. New springs sourced still not suitable.

Modelflight in Australia not contacted as yet which is the distributor in Australia.

If any other solutions out there would be interested.

Expect to maiden next weekend weather dependent.
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Old 02-03-2014, 02:31 AM
  #97
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Have seen Two Avantis have gear mount issues both dropped in from about a foot most planes should be able to withstand it but not the Avanti. In my opinion the undercarriage attach points are too light.
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Old 02-03-2014, 03:17 AM
  #98
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The springs too soft and allow no bounce or the undercarriage punches through the wings?????
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Old 02-03-2014, 03:53 AM
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The mounts actually break out no punching through the wings and they seemed not to bottom out but they probably did.
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Old 02-03-2014, 04:20 AM
  #100
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Maidened my Avanti yesterday, two flights with the K180G until gear issues stopped play.
First flight went well, until the landing circuit where I put on full flap. With the flaps down at 70 degrees, the Avanti stopped almost completely and required almost 3/4 down elevator and a lot of power to continue flying level. I touched down, however once on the ground it floated off and landed back on the mains, ripping out one of the gear blocks completely. First thing I noticed is there is very little glue on the gear blocks and what there is looks like hot glue. We did a field repair on the gear, gluing in the blocks with epoxy and got a second flight in, including some 3D with the VT pipe on. After this flight, fuelled up for a third flight and the gear ripped out again while taxiing on grass...
That ended the day and I've now brought it home, ripped the gear blocks out the other wing (they pulled out easily enough) and glued both blocks in securely with Hysol.

I am planning on a mid week flight with it and will report back again how this goes... As far as the 3D capability, our resident 3D guru had a go and was very impressed by the maneuverability with the VT on.
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