New TopRC T-28 Trojan
#154
Member
#155
Monday, Monday, can't trust that day
Monday, Monday, sometimes it just turns out that way
Oh Monday mornin' you gave me no warnin' of what was to be
Oh Monday, Monday, how could you leave and not take me
Bah-da bah-da-da-da
Bah-da bah-da-da-da
Bah-da bah-da-da-da
Monday, Monday, sometimes it just turns out that way
Oh Monday mornin' you gave me no warnin' of what was to be
Oh Monday, Monday, how could you leave and not take me
Bah-da bah-da-da-da
Bah-da bah-da-da-da
Bah-da bah-da-da-da
#156
Member
mounted the nose retract on mine. did a test of the strength of the support tray by pulling the strut forward and with minimal pressure the whole tray would easily flex.
going to use some aircraft grade ply and run it from the firewall to the front of that tray to handle some of the load. not much room to work because have to incorporate the throttle pushrod and the steering servo. should do the trick. also removed a lot of the cheap wood. need to trim the support i made to fit.
you can also see where i had to trim the front of the tray to clear my mufflers. mods mods mods!
also the nose gear doors will have to be on a y because the retract controller only has three inputs for door servos. either that or the main gear door servos on a y. i'm thinking i may just leave the nose doors off.
going to use some aircraft grade ply and run it from the firewall to the front of that tray to handle some of the load. not much room to work because have to incorporate the throttle pushrod and the steering servo. should do the trick. also removed a lot of the cheap wood. need to trim the support i made to fit.
you can also see where i had to trim the front of the tray to clear my mufflers. mods mods mods!
also the nose gear doors will have to be on a y because the retract controller only has three inputs for door servos. either that or the main gear door servos on a y. i'm thinking i may just leave the nose doors off.
#158
Member
#159
carbon fibre will help I am sure. Did Stewart get back to you with more photos??
Can't believe that gator have not done a build and flying report on them. Most odd that.
I saw the big Legend RC L-19 Bird dog, 156" span. Lovely model. No one in my country is selling them and I really have enough planes waiting for me to attack them anyway but it is a nice thought. ;-)
Can't believe that gator have not done a build and flying report on them. Most odd that.
I saw the big Legend RC L-19 Bird dog, 156" span. Lovely model. No one in my country is selling them and I really have enough planes waiting for me to attack them anyway but it is a nice thought. ;-)
#160
Member
carbon fibre will help I am sure. Did Stewart get back to you with more photos??
Can't believe that gator have not done a build and flying report on them. Most odd that.
I saw the big Legend RC L-19 Bird dog, 156" span. Lovely model. No one in my country is selling them and I really have enough planes waiting for me to attack them anyway but it is a nice thought. ;-)
Can't believe that gator have not done a build and flying report on them. Most odd that.
I saw the big Legend RC L-19 Bird dog, 156" span. Lovely model. No one in my country is selling them and I really have enough planes waiting for me to attack them anyway but it is a nice thought. ;-)
never heard back from stewart or mike. i don't know what it is with these giant scale planes. none of the manufacturers or distributors do any build or marketing videos. very odd when trying to sell multi thousand dollar toys. the foam planes have way better marketing.
it's a shame you can't get the L-19. that's a really nice plane!
#161
yeah and the market they are in is towards the top end of the hobby, not up with a CARF or the kero burners but close to it. Maybe they need to get a marketing guru on board or hire Peter Goldsmith, he can give them advice on many levels.
I've liked the look of the L-19 since I first saw one. Have a modelling mate who flew them in Vietnam, said he got sicvk of the cong taking pot shots at him so he carried a M16 and a few spare mags and would fly with window open and blat away at them to keep their heads down ! I could just see him doing that too. He flew Mirage III, F-86 avon engine version, F4E as well. Refused to go onto Pigs (F111), I'm not flying a bloody bomber!!
Anyway we digress.
I've liked the look of the L-19 since I first saw one. Have a modelling mate who flew them in Vietnam, said he got sicvk of the cong taking pot shots at him so he carried a M16 and a few spare mags and would fly with window open and blat away at them to keep their heads down ! I could just see him doing that too. He flew Mirage III, F-86 avon engine version, F4E as well. Refused to go onto Pigs (F111), I'm not flying a bloody bomber!!
Anyway we digress.
#162
Member
got some work done yesterday after not getting at it for a while. buddy of mine drilled and tapped the nose gear so the steering situation is figured out.
also reinforced the firewall with aircraft grade ply and made 2 nose gear supports. it's not too pretty but it should be way stronger than stock. that wood is flimsy.
also reinforced the firewall with aircraft grade ply and made 2 nose gear supports. it's not too pretty but it should be way stronger than stock. that wood is flimsy.
#164
Member
no problem. it's been quite a bit of work up front.
next up is the fuel tank. the stock tank looks sketchy and seems to hold around 40oz. i'm looking into installing two tanks, one on each side of the fuse. my dle-130 is thirsty and i have a heavy thumb so i want to be able to hold 50oz.
next up is the fuel tank. the stock tank looks sketchy and seems to hold around 40oz. i'm looking into installing two tanks, one on each side of the fuse. my dle-130 is thirsty and i have a heavy thumb so i want to be able to hold 50oz.
Last edited by pancake321; 11-28-2023 at 11:44 AM.
#165
That will work with the steering. As a thought I'd be inclined to install another arm under the first and have the captive ball link between them. That single arm will not live that long.
Last edited by planenutzz; 11-28-2023 at 12:31 PM.
#166
Member
interesting i've never seen a dual arm setup. i can't quite visualize it you wouldn't happen to have any pictures of one would you?
#168
Member
#169
#170
change of plans with the engine... UMS 180 5 Cylinder radial. I received a series of photos showing both the 180 and 210 mounted. Its doable. Engine mount will need a bit of modifying and use of standoffs.
Advice was that the 210 has 'crazy power'. The 180 will allow use of a nice big 3 blade prop and will keep RPM down. Sadly the Biella 32x15 scale T-28 prop is just too large for this engine but will see what Vario Prop can offer.
My shed fridge has a new sticker.
Advice was that the 210 has 'crazy power'. The 180 will allow use of a nice big 3 blade prop and will keep RPM down. Sadly the Biella 32x15 scale T-28 prop is just too large for this engine but will see what Vario Prop can offer.
My shed fridge has a new sticker.
#171
Member
that's a good engine choice on the ums. i was sent the same pics of the ums 180 in the airplane as well. seems to fit perfectly. now i want to go back to my original plane of putting a radial in mine haha.
was reading back through the posts and someone said the dle111 doesn't need any standoffs. my dle-130 needs almost 40mm standoffs i must be doing something wrong lol
was reading back through the posts and someone said the dle111 doesn't need any standoffs. my dle-130 needs almost 40mm standoffs i must be doing something wrong lol
#172
that's a good engine choice on the ums. i was sent the same pics of the ums 180 in the airplane as well. seems to fit perfectly. now i want to go back to my original plane of putting a radial in mine haha.
was reading back through the posts and someone said the dle111 doesn't need any standoffs. my dle-130 needs almost 40mm standoffs i must be doing something wrong lol
was reading back through the posts and someone said the dle111 doesn't need any standoffs. my dle-130 needs almost 40mm standoffs i must be doing something wrong lol
The version of T28 you and I have is the 2nd type and it has the firewall cut right back and with nose gear mount protruding forward. Its an odd change and can only think it was done to cater for other engine choices.
I will need to use standoffs for the 180 and trim some of the front of the nose gear mount to allow clearance for collector ring and reduce how far the prop hub pokes out past cowl lip.
Prop choice is my next concern. Ramoser Varioprop can do one and I did get a quote from them however I am unclear how it mounts given the UMS uses a 6 bolt prop hub mounting system. Vario probs generally uses a single bolt through the middle. Waiting to hear back from them.
#173
Member
ok that makes sense bc when i was talking about the radial earlier in the thread i was adamantly informed it wouldn't work. guess we were all correct haha.
im going to fly mine with the 130. then may go ums 180 or 210 in the spring. just need to get the fuel system installed and final engine install and im ready to maiden. hopefully in the next couple weeks.
im going to fly mine with the 130. then may go ums 180 or 210 in the spring. just need to get the fuel system installed and final engine install and im ready to maiden. hopefully in the next couple weeks.
#175
My large bench has been cleared and cleaned.
Doing up BoM for mine. yeah ouch $$$$$$$$$
Doing up BoM for mine. yeah ouch $$$$$$$$$
- Spektrum SPM4651T x 2 these will go into a powerbox SR2 - ordered
- Savox SV-1270TG Plus High Voltage Monster Torque Titanium Gear Digital 40kg @ 7.4V - qty 5 of those for flying surfaces, overkill but can get them at a very good price so why not? - ordered
- Savox - SV-1250MG Plus Digital High Voltage Coreless Servo, Metal Gear. qty 1 for throttle, I always like to put a good quality digital servo on throttle 8kg @7.4V - ordered
- Savox SB2290SG Brushless Digital Servo qty 3 for flaps and speed brake. 50kgcm @7.4V - ordered
- Dualsky DS589 High Torque HV Servo, qty 4 for gear doors 15kg at 7.4v - again these are overkill but very good pricing on them - ordered
- Powerbox Smart switch 7.4V - ignition kill - ordered
- Powerbox SR2 - ordered
- APS PowerFuel 380 RX - fuel pump for the UPS 180 - ordered
- LiION 2S 6400mAh with balance cct x 3 flight & ignition/fuel pump - Booma RC packs
- Pilots x 2, currently looking at a few options
- Ramoser VarioProp scale 3 blade T-28 propellor 29" ($$$$$$ ouch)
- Possibly lights, undecided on that yet. Lots of options out there, UniLights, BoomaRC ILS03, SkyCandy etc
Last edited by planenutzz; 12-07-2023 at 05:23 PM.
The following users liked this post:
marksp (12-09-2023)