T-28 Dave Platt
10-22-2010, 05:41 PM
#101
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RE: T-28 Dave Platt
Ok guy's I'm back in the saddle again.
Stab 1
I build the stab like I build the wing. Draw a center line on all ribs, trailing edge & leading edge. Put on the builiding board and measure all ribs so that the center line is equal distance from the building surface at the leading and trailing edge.
Stab 2
Picture shows how I place crutchs under the stab to make it straight. Not pictured, I place one sheet of sheeting on the tope of stab to keep it aligned. Then I take it off the building surface and finish sheeting.
I'm using Robart hinges rather than the way Dave Platt shows, because for me, it's easier. That means you will have to install blocks on both the stab & elevator for the hinges to glue into.
Elevator 1
Draw a center line on the LE of elevator & ribs. I just eye in the alingment.
Also not pictured, is a 3/32 music wire bent in the shape of an elonggated u with control horn braded to it to drive the elevator
Stab 1
I build the stab like I build the wing. Draw a center line on all ribs, trailing edge & leading edge. Put on the builiding board and measure all ribs so that the center line is equal distance from the building surface at the leading and trailing edge.
Stab 2
Picture shows how I place crutchs under the stab to make it straight. Not pictured, I place one sheet of sheeting on the tope of stab to keep it aligned. Then I take it off the building surface and finish sheeting.
I'm using Robart hinges rather than the way Dave Platt shows, because for me, it's easier. That means you will have to install blocks on both the stab & elevator for the hinges to glue into.
Elevator 1
Draw a center line on the LE of elevator & ribs. I just eye in the alingment.
Also not pictured, is a 3/32 music wire bent in the shape of an elonggated u with control horn braded to it to drive the elevator
10-22-2010, 07:12 PM
#102
RE: T-28 Dave Platt
Okay, Okay, so if I live vicariously through your build and dream of me doing it does that count... hopefully getting closer to ordering sierra gear and kit... wife is softening or maybe it's my brain from hearing her say maybe. Anyway glad to see you back at it, at least one of us will finish before the next decade 
Larry
Larry
10-23-2010, 05:58 PM
#104
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RE: T-28 Dave Platt
As we continue with the building of the T-28 let me make a couple of comments. I enjoy building "scale" models, but am not willing to put in the time that is required to enter in competition such as the Top Gun. I do this only for my pleasure. I have been progressing with the scale detail on each of my models such as cockpit interiors, panel lines, gear doors etc. I have a good friend here in Oklahoma City that is a Top Gun Judge. He has given me enoumous help in how to obtain scale apperance. His aircraft are spectacular. He will spend more time just on cockpit detail than I'm willing to do. As such, I will take shortcuts to cut back on the time it takes to build my models. I try to obtain commercially available parts and put them together, as opposed to making everything from scratch like he does. Each of you must decide for yourself the degree you are willing to spend in obtaining certain results. There are a couple of things I had to do with the T-28 that will draw back from the scale apperance, as you will see as we progress. I bet though, no one will notice at my flying field. Only those that are following this site. Lets keep this a seacret. Ha.
10-23-2010, 07:18 PM
#105
RE: T-28 Dave Platt
Boyd,
Your building tecniques so far on the Trojan impress. I hear what you are saying about time to make a Top Gun contender, it amazing that when I take my P-38 (not flown yet) the oohs and ahhs that come out of peoples mouths. And as a friend of mine told me, "can't see it 200' up in the air, though personal satisfaction is always a driving force. The Trojan will be my 2nd scale project, the Avenger along with a friend is my first. What I am learning on the Avenger build and Dave Platts videos is extreemly helpful not to mention inspiriing. The Avenger is taking a long time since everytime we turn around there is something to go back and do a bit better. Right now we are trying to get the outboard flaps to lay flat when retracted, this has become a real chore not mention we are NOW more than ever to get them as perfect as possible.
I look forward to your posts so that when the wife finally opens up the pocket book I will have someones guidance for the build.
Tahnks for the posts and happy flying
Larry
Your building tecniques so far on the Trojan impress. I hear what you are saying about time to make a Top Gun contender, it amazing that when I take my P-38 (not flown yet) the oohs and ahhs that come out of peoples mouths. And as a friend of mine told me, "can't see it 200' up in the air, though personal satisfaction is always a driving force. The Trojan will be my 2nd scale project, the Avenger along with a friend is my first. What I am learning on the Avenger build and Dave Platts videos is extreemly helpful not to mention inspiriing. The Avenger is taking a long time since everytime we turn around there is something to go back and do a bit better. Right now we are trying to get the outboard flaps to lay flat when retracted, this has become a real chore not mention we are NOW more than ever to get them as perfect as possible.
I look forward to your posts so that when the wife finally opens up the pocket book I will have someones guidance for the build.
Tahnks for the posts and happy flying
Larry
10-24-2010, 08:52 AM
#107
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RE: T-28 Dave Platt
This part covers the dorsal fin and rudder. I finally figured out how to put text in the pictures. I hope this will be a better way of showing everyone how I'm building the T-28. By the way, there is a lot of sanding on the rudder part. I like to use 60 to 80 grit to get most of it sanded. I hate to sand.
10-24-2010, 12:00 PM
#110
RE: T-28 Dave Platt
Boyd,
Here are some pix, I am now working on the actual spinners with 3 bladed props. It'sis from a Glass By Price Kit, I think he went out of business, I have had the kit for 10 years and didnt touch it for 5
Let me know if it worked
Larry
Here are some pix, I am now working on the actual spinners with 3 bladed props. It'sis from a Glass By Price Kit, I think he went out of business, I have had the kit for 10 years and didnt touch it for 5
Let me know if it worked
Larry
10-24-2010, 01:02 PM
#112
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RE: T-28 Dave Platt
The next series will focus on the fusalage.
I made a couple of descision when I sarted this project in regards to power plant and landing gear. I had already bought the Robart retracts and then decided on the power plant. I ended up choosing a Fuji BT-50ESI (46.50 cc).
First a thought regarding Dave Platts design, more particularly with right hand offset for the engine. I know his plans don't call for any offset thrust, but, I ALLWAYS design 3 degreesright hand thrust in my models regardless if the plans call for it or not. I have never been dissatisfied.
As a result of my decision to buy the Fuji engine I learned quickly that the only way for it to fit "right" within the cowl was to invert it. I didnot want any unsightly holes on the top or sides of the cowl.Because this plan has a nose gear, that meant by inverting the engine, thecylinder would hit the nose gear rails when inverted. This meant moving the firewall forward as you will see. The nose gear stays inplace according to the plans. As you will see later on, I made a second firewall out of 1/8th" ply and will put it in the location of the original firewall.
I made a couple of descision when I sarted this project in regards to power plant and landing gear. I had already bought the Robart retracts and then decided on the power plant. I ended up choosing a Fuji BT-50ESI (46.50 cc).
First a thought regarding Dave Platts design, more particularly with right hand offset for the engine. I know his plans don't call for any offset thrust, but, I ALLWAYS design 3 degreesright hand thrust in my models regardless if the plans call for it or not. I have never been dissatisfied.
As a result of my decision to buy the Fuji engine I learned quickly that the only way for it to fit "right" within the cowl was to invert it. I didnot want any unsightly holes on the top or sides of the cowl.Because this plan has a nose gear, that meant by inverting the engine, thecylinder would hit the nose gear rails when inverted. This meant moving the firewall forward as you will see. The nose gear stays inplace according to the plans. As you will see later on, I made a second firewall out of 1/8th" ply and will put it in the location of the original firewall.
10-24-2010, 01:11 PM
#113
RE: T-28 Dave Platt
Okay Mr. President / Chief Financial Officer Maser, 
Maser Quote [&:]:There are a couple of things I had to do with the T-28 that will draw back from the scale appearance, as you will see as we progress. I bet though, no one will notice at my flying field. Only those that are following this site. Lets keep this a secret. Ha.
Ah ha, I have you now[8D]. Okay here is the deal. You provide me with a coffee on our weekend flying mornings, oh and holidays too, and I will Not give out your little secret [sm=spinnyeyes.gif]. Also, what is this 80 grit thing. Have you reverted back on this? It took me to many years to get 320 into your hands, and I will not give up on you now
.
See you at the field. For now I have to get under my daughters car.
Maser Quote [&:]:There are a couple of things I had to do with the T-28 that will draw back from the scale appearance, as you will see as we progress. I bet though, no one will notice at my flying field. Only those that are following this site. Lets keep this a secret. Ha.
Ah ha, I have you now[8D]. Okay here is the deal. You provide me with a coffee on our weekend flying mornings, oh and holidays too
, and I will Not give out your little secret [sm=spinnyeyes.gif]. Also, what is this 80 grit thing. Have you reverted back on this? It took me to many years to get 320 into your hands, and I will not give up on you now.See you at the field. For now I have to get under my daughters car.
10-26-2010, 05:06 PM
#118
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RE: T-28 Dave Platt
As with the wing, I like to lay out most of the major components that will be inside the fus.prior to construction. As a general rule, I want to be ableto remove any major componants for repair or replacement. Once the air tank is positioned in the fus as shown on the plans, it is impossible to remove. Therefore, I made modification to F7 thru F9 so that I would be able to remove the air tank. Also, I want to be able to remove the pushrods so will make accomodations to allow me to do this as well. I hope the pics are self explanatory.
10-26-2010, 05:13 PM
#119
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RE: T-28 Dave Platt
Now we are ready to buld the fusalage. By the way, as you will see,I elevated the crutch and bulkheads to build above the plans. I like this method the best. These photos are self explanatory.
10-26-2010, 05:30 PM
#120
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RE: T-28 Dave Platt
More of fusalage bldg. Once the bulkheads are in place to be glued to the 3/8" sq. crutch, spot glue the 3/8" sq. crutch to the elevated crutchs. I deliberatley did not place bulkheads F-1 thru F-4 at this time. This will come next.
10-26-2010, 06:06 PM
#122
RE: T-28 Dave Platt
Boyd,
Awesome handy work and from the pix it looks like you have an awesome shop. Thanks for the photos and captions it will help me when I finally start mine
Larry
Awesome handy work and from the pix it looks like you have an awesome shop. Thanks for the photos and captions it will help me when I finally start mine
Larry
10-27-2010, 09:12 PM
#125
RE: T-28 Dave Platt
Hey Steve,
Believe it or not it has yet to fly, started this 10 yrs ago, lost my business because of a bad partner and it sat for almost 6 years before I got back into it. This weekend hoping to finish fitting the scale aluminum spinners and 3 bladed props, spinners weigh a ton, I think to help with the balancing which will happen after I get the spinners on. Some info, 74" wing span, 2 OS 61FX engines, 2 PCM recievers, dual battery packs, Mcdaniels glow driver for the inverted engines, spring air retracts, inboard and outboard flaps, 13 servos, 2 for rudders, 2 for elevator, 3 for flaps, 2 for ailerons, 2 for throttles, 1 for nose gear steering and 1 for retracts. Both engines have had 3 tanks of fuel run through them with the 2 bladed props. Can't wait to get the real spinners on and see how she pulls
Larry
Believe it or not it has yet to fly, started this 10 yrs ago, lost my business because of a bad partner and it sat for almost 6 years before I got back into it. This weekend hoping to finish fitting the scale aluminum spinners and 3 bladed props, spinners weigh a ton, I think to help with the balancing which will happen after I get the spinners on. Some info, 74" wing span, 2 OS 61FX engines, 2 PCM recievers, dual battery packs, Mcdaniels glow driver for the inverted engines, spring air retracts, inboard and outboard flaps, 13 servos, 2 for rudders, 2 for elevator, 3 for flaps, 2 for ailerons, 2 for throttles, 1 for nose gear steering and 1 for retracts. Both engines have had 3 tanks of fuel run through them with the 2 bladed props. Can't wait to get the real spinners on and see how she pulls
Larry